{
  "api": {
    "Document": {
      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document",
        "spec_url": [
          "https://dom.spec.whatwg.org/#interface-document",
          "https://html.spec.whatwg.org/multipage/dom.html#the-document-object",
          "https://drafts.csswg.org/cssom-view/#extensions-to-the-document-interface",
          "https://w3c.github.io/pointerlock/#extensions-to-the-document-interface",
          "https://w3c.github.io/selection-api/#extensions-to-document-interface"
        ],
        "tags": [
          "web-features:dom"
        ],
        "support": {
          "chrome": {
            "version_added": "1"
          },
          "chrome_android": "mirror",
          "edge": {
            "version_added": "12"
          },
          "firefox": {
            "version_added": "1"
          },
          "firefox_android": "mirror",
          "ie": {
            "version_added": "4"
          },
          "oculus": "mirror",
          "opera": {
            "version_added": "3"
          },
          "opera_android": {
            "version_added": "10.1"
          },
          "safari": {
            "version_added": "1"
          },
          "safari_ios": "mirror",
          "samsunginternet_android": "mirror",
          "webview_android": {
            "version_added": "1"
          },
          "webview_ios": "mirror"
        },
        "status": {
          "experimental": false,
          "standard_track": true,
          "deprecated": false
        }
      },
      "Document": {
        "__compat": {
          "description": "`Document()` constructor",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/Document",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-document①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "60"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "17"
            },
            "firefox": {
              "version_added": "20"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "8"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "DOMContentLoaded_event": {
        "__compat": {
          "description": "`DOMContentLoaded` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/DOMContentLoaded_event",
          "spec_url": "https://html.spec.whatwg.org/multipage/parsing.html#stop-parsing",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "9"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "3.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "URL": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/URL",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-url①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "19"
              },
              {
                "version_added": "1",
                "version_removed": "19",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": [
              {
                "version_added": "3"
              },
              {
                "version_added": "1",
                "version_removed": "3",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "activeElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/activeElement",
          "spec_url": "https://html.spec.whatwg.org/multipage/interaction.html#dom-documentorshadowroot-activeelement-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "2"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "7"
              },
              {
                "version_added": "4",
                "version_removed": "7",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "activeViewTransition": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/activeViewTransition",
          "spec_url": "https://drafts.csswg.org/css-view-transitions-2/#dom-document-activeviewtransition",
          "support": {
            "chrome": {
              "version_added": "142"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "147"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "26.2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "adoptedStyleSheets": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/adoptedStyleSheets",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-documentorshadowroot-adoptedstylesheets",
          "tags": [
            "web-features:constructed-stylesheets"
          ],
          "support": {
            "chrome": {
              "version_added": "73"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "101"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": "50"
            },
            "safari": {
              "version_added": "16.4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "mutable": {
          "__compat": {
            "description": "Array value is mutable",
            "spec_url": "https://drafts.csswg.org/cssom/#dom-documentorshadowroot-adoptedstylesheets",
            "tags": [
              "web-features:constructed-stylesheets"
            ],
            "support": {
              "chrome": {
                "version_added": "99"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "101"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "16.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "adoptNode": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/adoptNode",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-adoptnode①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "afterscriptexecute_event": {
        "__compat": {
          "description": "`afterscriptexecute` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/afterscriptexecute_event",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "9",
              "version_removed": "144"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "alinkColor": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/alinkColor",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-alinkcolor",
          "tags": [
            "web-features:document-colors"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "64"
              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "11"
              },
              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "all": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/all",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-all",
          "support": {
            "chrome": [
              {
                "version_added": "64"
              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "70"
              },
              {
                "version_added": "24",
                "version_removed": "70",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "11"
              },
              {
                "version_added": "3",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              },
              {
                "version_added": "1",
                "version_removed": "2",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": [
              {
                "version_added": "11"
              },
              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "anchors": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/anchors",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-anchors",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "1",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "append": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/append",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-append①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "54"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "17"
            },
            "firefox": {
              "version_added": "49"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "applets": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/applets",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-applets",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "1",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "ariaNotify": {
        "__compat": {
          "description": "`ariaNotify() method`",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/ariaNotify",
          "spec_url": "https://w3c.github.io/aria/#ARIANotifyMixin",
          "tags": [
            "web-features:arianotify"
          ],
          "support": {
            "chrome": {
              "version_added": "141",
              "partial_implementation": true,
              "notes": [
                "Fully supported on Windows and Linux, no support on ChromeOS.",
                "Method exposed on macOS, but notifications are not reliably spoken."
              ]
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "150"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "beforescriptexecute_event": {
        "__compat": {
          "description": "`beforescriptexecute` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/beforescriptexecute_event",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "9",
              "version_removed": "144"
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            "standard_track": false,
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/bgColor",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-bgcolor",
          "tags": [
            "web-features:document-colors"
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              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              "version_added": "12"
            },
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                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
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              "version_added": "4"
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                "version_added": "51"
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              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            "web-features:dom"
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              {
                "version_added": "60"
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              {
                "version_added": "1",
                "version_removed": "60",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
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            "ie": {
              "version_added": "4"
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              "version_added": "9.6"
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            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/browsingTopics",
          "tags": [
            "web-features:topics"
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          "support": {
            "chrome": {
              "version_added": "126"
            },
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            "edge": "mirror",
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              "version_added": false
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            "opera_android": "mirror",
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            },
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            "webview_android": "mirror",
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          },
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            "standard_track": false,
            "deprecated": true
          }
        }
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          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-captureevents",
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              {
                "version_added": "64"
              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            },
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              {
                "version_added": "1",
                "version_removed": "70",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "deprecated": true
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          "tags": [
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            "webview_ios": "mirror"
          },
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            "standard_track": true,
            "deprecated": false
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        },
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            "description": "`options` parameter",
            "tags": [
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                "version_added": "128"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": [
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                  "version_added": "150"
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                {
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                  "version_removed": "133"
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              "opera": "mirror",
              "opera_android": "mirror",
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              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
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              "deprecated": false
            }
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              "version_added": "4"
            },
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            "edge": {
              "version_added": "12"
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          },
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            "standard_track": false,
            "deprecated": false
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/characterSet",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-characterset①",
          "tags": [
            "web-features:dom"
          ],
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              {
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                "version_added": "1",
                "notes": "`charset` alias was made read-only in Chrome 45."
              },
              {
                "alternative_name": "inputEncoding",
                "version_added": "1"
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            ],
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                "version_added": "12"
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              {
                "alternative_name": "charset",
                "version_added": "12"
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              {
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                "version_added": "12"
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            ],
            "firefox": [
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                "version_added": "1"
              },
              {
                "alternative_name": "charset",
                "version_added": "44"
              },
              {
                "alternative_name": "inputEncoding",
                "version_added": "1.5"
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              {
                "version_added": "9"
              },
              {
                "alternative_name": "inputEncoding",
                "version_added": "9"
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              {
                "alternative_name": "charset",
                "version_added": "4"
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            "oculus": "mirror",
            "opera": [
              {
                "version_added": "≤12.1"
              },
              {
                "alternative_name": "charset",
                "version_added": "15",
                "notes": "`charset` alias was made read-only in Opera 45."
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              {
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              {
                "version_added": "≤12.1"
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              {
                "alternative_name": "charset",
                "version_added": "14",
                "notes": "`charset` alias was made read-only in Opera 45."
              },
              {
                "alternative_name": "inputEncoding",
                "version_added": "14"
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                "version_added": "3"
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              {
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                "version_added": "1"
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              {
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              {
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                "version_added": "1"
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            "samsunginternet_android": "mirror",
            "webview_android": [
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                "version_added": "1"
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              {
                "alternative_name": "charset",
                "version_added": "1",
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              {
                "alternative_name": "inputEncoding",
                "version_added": "1"
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            "webview_ios": "mirror"
          },
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            "standard_track": true,
            "deprecated": false
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/childElementCount",
          "spec_url": "https://dom.spec.whatwg.org/#dom-parentnode-childelementcount",
          "tags": [
            "web-features:dom"
          ],
          "support": {
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              "version_added": "29"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "17"
            },
            "firefox": {
              "version_added": "25"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "9"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/children",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-children①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "29"
            },
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            "edge": {
              "version_added": "16"
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            "opera": "mirror",
            "opera_android": "mirror",
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            },
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/clear",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-clear",
          "support": {
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              {
                "version_added": "64"
              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
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            "edge": {
              "version_added": "12"
            },
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              {
                "version_added": "70"
              },
              {
                "version_added": "1",
                "version_removed": "70",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
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            "opera": [
              {
                "version_added": "51"
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              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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                "version_added": "47"
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              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "version_added": "11"
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              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "experimental": false,
            "standard_track": true,
            "deprecated": true
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        }
      },
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/close",
          "spec_url": "https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-close-dev",
          "tags": [
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                "version_added": "45"
              },
              {
                "version_added": "1",
                "version_removed": "45",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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              "version_added": "12"
            },
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              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
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            "ie": {
              "version_added": "4"
            },
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            "opera": [
              {
                "version_added": "51"
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              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "version_added": "11"
              },
              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "standard_track": true,
            "deprecated": false
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        }
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/compatMode",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-compatmode①",
          "tags": [
            "web-features:dom"
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          "support": {
            "chrome": [
              {
                "version_added": "8"
              },
              {
                "version_added": "1",
                "version_removed": "8",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
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              {
                "version_added": "19"
              },
              {
                "version_added": "1",
                "version_removed": "19",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "6"
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              {
                "version_added": "3.1",
                "version_removed": "5.1",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "standard_track": true,
            "deprecated": false
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        }
      },
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/contentType",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-contenttype①",
          "tags": [
            "web-features:dom"
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            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "23"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "15"
              }
            ],
            "opera_android": [
              {
                "version_added": "24"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "14"
              }
            ],
            "safari": {
              "version_added": "9"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "cookie": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/cookie",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-cookie",
          "tags": [
            "web-features:cookies"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "68"
              },
              {
                "version_added": "1",
                "version_removed": "68",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createAttribute": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createAttribute",
          "spec_url": "https://dom.spec.whatwg.org/#dom-document-createattribute",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "44"
              },
              {
                "version_added": "1",
                "version_removed": "44",
                "notes": "The parameter was not converted to its lowercase variant."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "html_name_validity": {
          "__compat": {
            "description": "Emoji and more Unicode in element and attribute names and namespace prefix (valid names match HTML parser)",
            "spec_url": "https://dom.spec.whatwg.org/#namespaces",
            "support": {
              "chrome": {
                "version_added": "143"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "149"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "createAttributeNS": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createAttributeNS",
          "spec_url": "https://dom.spec.whatwg.org/#dom-document-createattributens",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "html_name_validity": {
          "__compat": {
            "description": "Emoji and more Unicode in element and attribute names and namespace prefix (valid names match HTML parser)",
            "spec_url": "https://dom.spec.whatwg.org/#namespaces",
            "support": {
              "chrome": {
                "version_added": "143"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "149"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "createCDATASection": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createCDATASection",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-createcomment①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createComment": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createComment",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-createcomment①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createDocumentFragment": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createDocumentFragment",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-createdocumentfragment①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createElement",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-createelement①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Doesn't conform to the DOM spec for XUL and XHTML documents: `localName` and `namespaceURI` are not set to null on the created element."
            },
            "firefox_android": {
              "version_added": "4"
            },
            "ie": {
              "version_added": "5"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "6"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
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        },
        "html_name_validity": {
          "__compat": {
            "description": "Emoji and more Unicode in element and attribute names and namespace prefix (valid names match HTML parser)",
            "spec_url": "https://dom.spec.whatwg.org/#namespaces",
            "support": {
              "chrome": {
                "version_added": "143"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "149"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "options_parameter": {
          "__compat": {
            "description": "`options` parameter",
            "spec_url": "https://dom.spec.whatwg.org/#dictdef-elementcreationoptions",
            "tags": [
              "web-features:dom"
            ],
            "support": {
              "chrome": {
                "version_added": "56",
                "notes": "For backwards compatibility, the `options` parameter can be an object or a string with the custom element tag name, although the string version is deprecated."
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "50",
                "notes": "Firefox accepts a string instead of an object here, but only from version 51 onwards. In version 50, options must be an object."
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "26"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "customElementRegistry_option": {
            "__compat": {
              "description": "`customElementRegistry` option",
              "spec_url": "https://dom.spec.whatwg.org/#dictdef-elementcreationoptions",
              "support": {
                "chrome": {
                  "version_added": "146"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "26"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "options_is_parameter": {
            "__compat": {
              "description": "`is` parameter",
              "spec_url": "https://dom.spec.whatwg.org/#dictdef-elementcreationoptions",
              "support": {
                "chrome": {
                  "version_added": "56"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "26"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          }
        }
      },
      "createElementNS": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createElementNS",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-createelementns①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Doesn't conform to the DOM spec for XUL and XHTML documents: `localName` and `namespaceURI` are not set to null on the created element."
            },
            "firefox_android": {
              "version_added": "4"
            },
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
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        },
        "html_name_validity": {
          "__compat": {
            "description": "Emoji and more Unicode in element and attribute names and namespace prefix (valid names match HTML parser)",
            "spec_url": "https://dom.spec.whatwg.org/#namespaces",
            "support": {
              "chrome": {
                "version_added": "143"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "149"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "options_parameter": {
          "__compat": {
            "description": "`options` parameter",
            "spec_url": "https://dom.spec.whatwg.org/#dictdef-elementcreationoptions",
            "tags": [
              "web-features:dom"
            ],
            "support": {
              "chrome": {
                "version_added": "56",
                "notes": "For backwards compatibility, the `options` parameter can be an object or a string with the custom element tag name, although the string version is deprecated."
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "50",
                "notes": "Firefox accepts a string instead of an object here, but only from version 51 onwards. In version 50, options must be an object."
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "26"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          },
          "customElementRegistry_option": {
            "__compat": {
              "description": "`customElementRegistry` option",
              "spec_url": "https://dom.spec.whatwg.org/#dictdef-elementcreationoptions",
              "support": {
                "chrome": {
                  "version_added": "146"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "26"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "options_is_parameter": {
            "__compat": {
              "description": "`is` option",
              "spec_url": "https://dom.spec.whatwg.org/#dictdef-elementcreationoptions",
              "support": {
                "chrome": {
                  "version_added": "56"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
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            }
          }
        }
      },
      "createEvent": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createEvent",
          "spec_url": "https://dom.spec.whatwg.org/#dom-document-createevent",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "From version 67, creating touch events using this method is no longer supported."
            },
            "firefox_android": {
              "version_added": "4"
            },
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "7"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "createExpression": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createExpression",
          "spec_url": "https://dom.spec.whatwg.org/#dom-xpathevaluatorbase-createexpression",
          "tags": [
            "web-features:xpath"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "3"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createNodeIterator": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createNodeIterator",
          "spec_url": "https://dom.spec.whatwg.org/#dom-document-createnodeiterator",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "9"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createNSResolver": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createNSResolver",
          "spec_url": "https://dom.spec.whatwg.org/#dom-xpathevaluatorbase-creatensresolver",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "3"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "createProcessingInstruction": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createProcessingInstruction",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-createprocessinginstruction①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createRange": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createRange",
          "spec_url": "https://dom.spec.whatwg.org/#dom-document-createrange",
          "tags": [
            "web-features:selection-api"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createTextNode": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createTextNode",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-createtextnode①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "7"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "createTouch": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createTouch",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": {
              "version_added": "25",
              "version_removed": "68",
              "notes": "Since Chrome 55, all parameters are optional."
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "18",
              "version_removed": "67"
            },
            "firefox_android": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": "14",
              "version_removed": "48",
              "notes": "Since Opera Android 42, all parameters are optional."
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": "≤3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "createTouchList": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createTouchList",
          "support": {
            "chrome": {
              "version_added": "22",
              "version_removed": "69"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "18",
              "version_removed": "67"
            },
            "firefox_android": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": "≤3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "createTreeWalker": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/createTreeWalker",
          "spec_url": "https://dom.spec.whatwg.org/#dom-document-createtreewalker",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "9"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "whatToShow_filter_parameters_optional": {
          "__compat": {
            "description": "`whatToShow` and `filter` parameters are optional",
            "tags": [
              "web-features:dom"
            ],
            "support": {
              "chrome": {
                "version_added": "4"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "13"
              },
              "firefox": {
                "version_added": "12"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": {
                "version_added": "≤15"
              },
              "opera_android": {
                "version_added": "≤14"
              },
              "safari": {
                "version_added": "3"
              },
              "safari_ios": {
                "version_added": "3"
              },
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "currentScript": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/currentScript",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-currentscript-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "29"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "4"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "8"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "customElementRegistry": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/customElementRegistry",
          "spec_url": "https://dom.spec.whatwg.org/#dom-documentorshadowroot-customelementregistry",
          "tags": [
            "web-features:scoped-custom-element-registries"
          ],
          "support": {
            "chrome": {
              "version_added": "146"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "150",
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.scoped-custom-element-registries.enabled",
                  "value_to_set": "true"
                }
              ],
              "impl_url": "https://bugzil.la/2018900"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "26"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "defaultView": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/defaultView",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-document-defaultview-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "designMode": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/designMode",
          "spec_url": "https://html.spec.whatwg.org/multipage/interaction.html#dom-document-designmode-dev",
          "support": {
            "chrome": [
              {
                "version_added": "36"
              },
              {
                "version_added": "1",
                "version_removed": "36",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "9"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": [
              {
                "version_added": "10.1"
              },
              {
                "version_added": "1",
                "version_removed": "10.1",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "dir": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/dir",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-dir",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "36"
              },
              {
                "version_added": "1",
                "version_removed": "36",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Incorrect behavior before Firefox 23."
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "10.1"
              },
              {
                "version_added": "1",
                "version_removed": "10.1",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "doctype": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/doctype",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-doctype①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "documentElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/documentElement",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-documentelement①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "7"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "documentURI": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/documentURI",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-documenturi①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "17"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "domain": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/domain",
          "spec_url": "https://html.spec.whatwg.org/multipage/browsers.html#relaxing-the-same-origin-restriction",
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Since Chrome 115, setting `domain` has no effect, unless the website has opted into [origin-keyed agent clusters](https://developer.mozilla.org/docs/Web/HTTP/Headers/Origin-Agent-Cluster)."
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69",
                "notes": "From Firefox 62, if the domain cannot be identified, `domain` returns an empty string instead of `null`. See [bug 819475](https://bugzil.la/819475)."
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "elementFromPoint": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/elementFromPoint",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-document-elementfrompoint",
          "tags": [
            "web-features:element-from-point"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Before Chrome 66, this method returned `null` when the element was a child of a host node. See [bug 40537452](https://crbug.com/40537452)."
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1",
              "notes": "Before Opera 53, this method returned `null` when the element was a child of a host node. See [bug 40537452](https://crbug.com/40537452)."
            },
            "opera_android": {
              "version_added": "≤12.1",
              "notes": "Before Opera Android 47, this method returned `null` when the element was a child of a host node. See [bug 40537452](https://crbug.com/40537452)."
            },
            "safari": {
              "version_added": "4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "elementsFromPoint": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/elementsFromPoint",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-document-elementsfrompoint",
          "tags": [
            "web-features:element-from-point"
          ],
          "support": {
            "chrome": {
              "version_added": "43",
              "notes": "Before Chrome 66, this method returned `null` when the element was a child of a host node. See [bug 40537452](https://crbug.com/40537452)."
            },
            "chrome_android": "mirror",
            "edge": [
              {
                "version_added": "79"
              },
              {
                "prefix": "ms",
                "version_added": "12",
                "version_removed": "79",
                "notes": "Returns a `NodeList` instead of an array. See [the MSDN documentation](https://msdn.microsoft.com/en-us/library/hh772121(v=vs.85).aspx). Returns `null` when the point provided has no elements beneath it (e.g., when given a point outside the document)."
              }
            ],
            "firefox": {
              "version_added": "46"
            },
            "firefox_android": "mirror",
            "ie": {
              "prefix": "ms",
              "version_added": "10",
              "notes": "Returns a `NodeList` instead of an array. See [the MSDN documentation](https://msdn.microsoft.com/en-us/library/hh772121(v=vs.85).aspx). Returns `null` when the point provided has no elements beneath it (e.g., when given a point outside the document)."
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "30"
            },
            "opera_android": {
              "version_added": "30"
            },
            "safari": {
              "version_added": "11.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "embeds": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/embeds",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-embeds-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "36"
              },
              {
                "version_added": "1",
                "version_removed": "36",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "1",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "10.1"
              },
              {
                "version_added": "2",
                "version_removed": "10.1",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "enableStyleSheetsForSet": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/enableStyleSheetsForSet",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "evaluate": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/evaluate",
          "spec_url": "https://dom.spec.whatwg.org/#dom-xpathevaluatorbase-evaluate",
          "tags": [
            "web-features:xpath"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": {
              "version_added": "9"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "3"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "execCommand": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/execCommand",
          "tags": [
            "web-features:execcommand"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69",
                "notes": [
                  "From Firefox 82, nested calls are not supported (return `false`). See [bug 1634262](https://bugzil.la/1634262).",
                  "Before Firefox 89, manipulating the content of `<input>` and `<textarea>` elements using `Document.execCommand()` commands requires workarounds (see [bug 1220696](https://bugzil.la/1220696))."
                ]
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "9"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1.3"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        },
        "copy": {
          "__compat": {
            "description": "`copy` command",
            "tags": [
              "web-features:execcommand"
            ],
            "support": {
              "chrome": {
                "version_added": "42"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "41"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "10"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        },
        "cut": {
          "__compat": {
            "description": "`cut` command",
            "tags": [
              "web-features:execcommand"
            ],
            "support": {
              "chrome": {
                "version_added": "42"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "41"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "10"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        },
        "defaultParagraphSeparator": {
          "__compat": {
            "description": "`defaultParagraphSeparator` command",
            "tags": [
              "web-features:execcommand"
            ],
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "≤18",
                "version_removed": "79"
              },
              "firefox": {
                "version_added": "55"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        },
        "insertBrOnReturn": {
          "__compat": {
            "description": "`insertBrOnReturn` command",
            "tags": [
              "web-features:execcommand"
            ],
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "1.5"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        },
        "insertHTML": {
          "__compat": {
            "description": "`insertHTML` command",
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "4"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "9"
              },
              "opera_android": {
                "version_added": "10.1"
              },
              "safari": {
                "version_added": "1.3"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          },
          "enforces_trusted_types": {
            "__compat": {
              "description": "Requires `TrustedHTML` instance when trusted types are enforced",
              "support": {
                "chrome": {
                  "version_added": "96"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "preview"
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "26"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": true
              }
            }
          }
        },
        "paste": {
          "__compat": {
            "description": "`paste` command",
            "tags": [
              "web-features:execcommand"
            ],
            "support": {
              "chrome": {
                "version_added": "42"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "148",
                "notes": "Supported in content scripts (not just extensions) via the [Clipboard API](https://developer.mozilla.org/docs/Web/API/Clipboard_API)"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        }
      },
      "exitFullscreen": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/exitFullscreen",
          "spec_url": "https://fullscreen.spec.whatwg.org/#ref-for-dom-document-exitfullscreen①",
          "tags": [
            "web-features:fullscreen"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "71"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
              }
            ],
            "chrome_android": "mirror",
            "edge": [
              {
                "version_added": "79"
              },
              {
                "prefix": "webkit",
                "version_added": "12"
              },
              {
                "version_added": "12",
                "version_removed": "14"
              }
            ],
            "firefox": [
              {
                "version_added": "64"
              },
              {
                "alternative_name": "mozCancelFullScreen",
                "version_added": "9"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "prefix": "ms",
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "58"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
              },
              {
                "version_added": "12.1",
                "version_removed": "15"
              }
            ],
            "opera_android": [
              {
                "version_added": "50"
              },
              {
                "prefix": "webkit",
                "version_added": "14"
              },
              {
                "version_added": "12.1",
                "version_removed": "14"
              }
            ],
            "safari": [
              {
                "version_added": "16.4"
              },
              {
                "prefix": "webkit",
                "version_added": "5.1"
              }
            ],
            "safari_ios": [
              {
                "version_added": "16.4",
                "partial_implementation": true,
                "notes": [
                  "Only available on iPad, not on iPhone.",
                  "Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games."
                ]
              },
              {
                "prefix": "webkit",
                "version_added": "12",
                "partial_implementation": true,
                "notes": "Only available on iPad, not on iPhone."
              }
            ],
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": {
              "version_added": false
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "returns_promise": {
          "__compat": {
            "description": "Returns a `Promise`",
            "tags": [
              "web-features:fullscreen"
            ],
            "support": {
              "chrome": {
                "version_added": "69"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "64"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "16.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": {
                "version_added": false
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "exitPictureInPicture": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/exitPictureInPicture",
          "spec_url": "https://w3c.github.io/picture-in-picture/#dom-document-exitpictureinpicture",
          "tags": [
            "web-features:picture-in-picture"
          ],
          "support": {
            "chrome": {
              "version_added": "69"
            },
            "chrome_android": {
              "version_added": "105"
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1463402"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "13.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "exitPointerLock": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/exitPointerLock",
          "spec_url": "https://w3c.github.io/pointerlock/#dom-document-exitpointerlock",
          "tags": [
            "web-features:pointer-lock"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "37"
              },
              {
                "prefix": "webkit",
                "version_added": "22"
              }
            ],
            "chrome_android": {
              "version_added": false,
              "impl_url": "https://crbug.com/40290045"
            },
            "edge": {
              "version_added": "13"
            },
            "firefox": [
              {
                "version_added": "50"
              },
              {
                "prefix": "moz",
                "version_added": "14",
                "version_removed": "50"
              }
            ],
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "featurePolicy": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/featurePolicy",
          "tags": [
            "web-features:feature-policy"
          ],
          "support": {
            "chrome": {
              "version_added": "74"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "69",
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.security.featurePolicy.webidl.enabled",
                  "value_to_set": "true"
                }
              ]
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "fgColor": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fgColor",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-fgcolor",
          "tags": [
            "web-features:document-colors"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "64"
              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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              "version_added": "12"
            },
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                "version_added": "69"
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              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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              {
                "version_added": "11"
              },
              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "standard_track": true,
            "deprecated": true
          }
        }
      },
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/firstElementChild",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-firstelementchild①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "29"
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            "edge": {
              "version_added": "17"
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            "firefox": {
              "version_added": "25"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "9"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fonts",
          "spec_url": "https://drafts.csswg.org/css-font-loading/#FontFaceSet-interface",
          "tags": [
            "web-features:font-loading"
          ],
          "support": {
            "chrome": {
              "version_added": "35"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "41"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "forms": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/forms",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-forms-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
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            "firefox": [
              {
                "version_added": "61"
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              {
                "version_added": "1",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            ],
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            "ie": {
              "version_added": "4"
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            "opera": {
              "version_added": "≤12.1"
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            "opera_android": {
              "version_added": "≤12.1"
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              {
                "version_added": "4"
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              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
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          },
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            "standard_track": true,
            "deprecated": false
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fragmentDirective",
          "spec_url": "https://wicg.github.io/scroll-to-text-fragment/#dom-document-fragmentdirective",
          "tags": [
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            "chrome": {
              "version_added": "86"
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            "edge": "mirror",
            "firefox": {
              "version_added": "131"
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            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "18.4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
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        "__compat": {
          "description": "`freeze` event",
          "spec_url": "https://wicg.github.io/page-lifecycle/#dom-document-onfreeze",
          "tags": [
            "web-features:page-lifecycle"
          ],
          "support": {
            "chrome": {
              "version_added": "68"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "fullscreen": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fullscreen",
          "spec_url": "https://fullscreen.spec.whatwg.org/#dom-document-fullscreen",
          "tags": [
            "web-features:fullscreen"
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          "support": {
            "chrome": [
              {
                "version_added": "71"
              },
              {
                "alternative_name": "webkitIsFullScreen",
                "version_added": "15"
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            ],
            "chrome_android": "mirror",
            "edge": [
              {
                "version_added": "79"
              },
              {
                "alternative_name": "webkitIsFullScreen",
                "version_added": "12"
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            ],
            "firefox": [
              {
                "version_added": "64"
              },
              {
                "alternative_name": "mozFullScreen",
                "version_added": "9"
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            ],
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": [
              {
                "version_added": "16.4"
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              {
                "alternative_name": "webkitIsFullScreen",
                "version_added": "6"
              }
            ],
            "safari_ios": [
              {
                "version_added": "16.4",
                "partial_implementation": true,
                "notes": [
                  "Only available on iPad, not on iPhone.",
                  "Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games."
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              },
              {
                "alternative_name": "webkitIsFullScreen",
                "version_added": "12",
                "partial_implementation": true,
                "notes": "Only available on iPad, not on iPhone."
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            ],
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
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              "version_added": false
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          },
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            "standard_track": true,
            "deprecated": true
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          "description": "`fullscreenchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fullscreenchange_event",
          "spec_url": "https://fullscreen.spec.whatwg.org/#handler-document-onfullscreenchange",
          "tags": [
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            "chrome": [
              {
                "version_added": "71"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
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              {
                "version_added": "79"
              },
              {
                "prefix": "webkit",
                "version_added": "12"
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              {
                "version_added": "12",
                "version_removed": "14"
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              {
                "version_added": "64"
              },
              {
                "prefix": "moz",
                "version_added": "10"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "alternative_name": "MSFullscreenChange",
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "58"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
              },
              {
                "version_added": "12.1",
                "version_removed": "15"
              }
            ],
            "opera_android": [
              {
                "version_added": "50"
              },
              {
                "prefix": "webkit",
                "version_added": "14"
              },
              {
                "version_added": "12.1",
                "version_removed": "14"
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            ],
            "safari": [
              {
                "version_added": "16.4"
              },
              {
                "prefix": "webkit",
                "version_added": "5.1"
              }
            ],
            "safari_ios": [
              {
                "version_added": "16.4",
                "partial_implementation": true,
                "notes": [
                  "Only available on iPad, not on iPhone.",
                  "Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games."
                ]
              },
              {
                "prefix": "webkit",
                "version_added": "12",
                "partial_implementation": true,
                "notes": "Only available on iPad, not on iPhone."
              }
            ],
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": {
              "version_added": false
            }
          },
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            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
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        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fullscreenElement",
          "spec_url": "https://fullscreen.spec.whatwg.org/#ref-for-dom-document-fullscreenelement①",
          "tags": [
            "web-features:fullscreen"
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          "support": {
            "chrome": [
              {
                "version_added": "71"
              },
              {
                "prefix": "webkit",
                "version_added": "20"
              }
            ],
            "chrome_android": "mirror",
            "edge": [
              {
                "version_added": "79"
              },
              {
                "prefix": "webkit",
                "version_added": "12"
              },
              {
                "version_added": "12",
                "version_removed": "14"
              }
            ],
            "firefox": [
              {
                "version_added": "64"
              },
              {
                "alternative_name": "mozFullScreenElement",
                "version_added": "9"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "prefix": "ms",
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "58"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
              },
              {
                "version_added": "12.1",
                "version_removed": "15"
              }
            ],
            "opera_android": [
              {
                "version_added": "50"
              },
              {
                "prefix": "webkit",
                "version_added": "14"
              },
              {
                "version_added": "12.1",
                "version_removed": "14"
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            ],
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                "version_added": "16.4"
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              {
                "prefix": "webkit",
                "version_added": "6"
              }
            ],
            "safari_ios": [
              {
                "version_added": "16.4",
                "partial_implementation": true,
                "notes": [
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              },
              {
                "prefix": "webkit",
                "version_added": "12",
                "partial_implementation": true,
                "notes": "Only available on iPad, not on iPhone."
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            "webview_android": "mirror",
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          },
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            "standard_track": true,
            "deprecated": false
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        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fullscreenEnabled",
          "spec_url": "https://fullscreen.spec.whatwg.org/#ref-for-dom-document-fullscreenenabled①",
          "tags": [
            "web-features:fullscreen"
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          "support": {
            "chrome": [
              {
                "version_added": "71"
              },
              {
                "prefix": "webkit",
                "version_added": "20"
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "64"
              },
              {
                "alternative_name": "mozFullScreenEnabled",
                "version_added": "10"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "prefix": "ms",
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "58"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
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              {
                "version_added": "12.1",
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            ],
            "opera_android": [
              {
                "version_added": "50"
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              {
                "prefix": "webkit",
                "version_added": "14"
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              {
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                "version_added": "16.4"
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              {
                "prefix": "webkit",
                "version_added": "6"
              }
            ],
            "safari_ios": [
              {
                "version_added": "16.4",
                "partial_implementation": true,
                "notes": [
                  "Only available on iPad, not on iPhone.",
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                ]
              },
              {
                "prefix": "webkit",
                "version_added": "12",
                "partial_implementation": true,
                "notes": "Only available on iPad, not on iPhone."
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            "samsunginternet_android": "mirror",
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              "version_added": false
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          },
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            "experimental": false,
            "standard_track": true,
            "deprecated": false
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        "__compat": {
          "description": "`fullscreenerror` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/fullscreenerror_event",
          "spec_url": "https://fullscreen.spec.whatwg.org/#handler-document-onfullscreenerror",
          "tags": [
            "web-features:fullscreen"
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          "support": {
            "chrome": [
              {
                "version_added": "71"
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              {
                "prefix": "webkit",
                "version_added": "18"
              }
            ],
            "chrome_android": "mirror",
            "edge": [
              {
                "version_added": "79"
              },
              {
                "prefix": "webkit",
                "version_added": "12"
              },
              {
                "version_added": "12",
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            ],
            "firefox": [
              {
                "version_added": "64"
              },
              {
                "prefix": "moz",
                "version_added": "10"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "alternative_name": "MSFullscreenError",
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "58"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
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              {
                "version_added": "12.1",
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            ],
            "opera_android": [
              {
                "version_added": "50"
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              {
                "prefix": "webkit",
                "version_added": "14"
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              {
                "version_added": "12.1",
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                "version_added": "16.4"
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              {
                "prefix": "webkit",
                "version_added": "6"
              }
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              {
                "version_added": "16.4",
                "partial_implementation": true,
                "notes": [
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              },
              {
                "prefix": "webkit",
                "version_added": "12",
                "partial_implementation": true,
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            "samsunginternet_android": "mirror",
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          },
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            "standard_track": true,
            "deprecated": false
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      },
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/getAnimations",
          "spec_url": "https://drafts.csswg.org/web-animations-1/#dom-documentorshadowroot-getanimations",
          "tags": [
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          "support": {
            "chrome": {
              "version_added": "84"
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            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "75"
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            "opera_android": "mirror",
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                "version_added": "13.1",
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                "partial_implementation": true,
                "notes": "Implements an older version of the specification, see [bug 179536](https://webkit.org/b/179536)."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
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            "deprecated": false
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            "web-features:getboxquads"
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              "version_added": false
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            "edge": "mirror",
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              "version_added": "31",
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            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
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        }
      },
      "getElementById": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/getElementById",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-nonelementparentnode-getelementbyid②",
          "tags": [
            "web-features:dom"
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          "support": {
            "chrome": {
              "version_added": "1"
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            "chrome_android": "mirror",
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              "version_added": "12"
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            "firefox": {
              "version_added": "1"
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            "firefox_android": "mirror",
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              "version_added": "5.5"
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            "oculus": "mirror",
            "opera": {
              "version_added": "7"
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            "opera_android": {
              "version_added": "10.1"
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            "safari": {
              "version_added": "1"
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            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
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            "standard_track": true,
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        }
      },
      "getElementsByClassName": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/getElementsByClassName",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-getelementsbyclassname①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "9.5"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "3.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "getElementsByName": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/getElementsByName",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-getelementsbyname-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12",
              "notes": "Before Edge 79, this method returns an `HTMLCollection`, not a `NodeList`."
            },
            "firefox": [
              {
                "version_added": "58"
              },
              {
                "version_added": "1",
                "version_removed": "58",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5",
              "notes": "Returns an `HTMLCollection`, not a `NodeList`"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "5"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "getElementsByTagName": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/getElementsByTagName",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-getelementsbytagname①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "5.1"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "getElementsByTagNameNS": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/getElementsByTagNameNS",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-getelementsbytagnamens①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "getSelection": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/getSelection",
          "spec_url": "https://w3c.github.io/selection-api/#dom-document-getselection",
          "tags": [
            "web-features:selection-api"
          ],
          "support": {
            "chrome": {
              "version_added": "2"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "57"
              },
              {
                "version_added": "1",
                "version_removed": "57",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "hasFocus": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/hasFocus",
          "spec_url": "https://html.spec.whatwg.org/multipage/interaction.html#dom-document-hasfocus-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "34"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5.5"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": [
              {
                "version_added": "7"
              },
              {
                "version_added": "4",
                "version_removed": "7",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "hasPrivateToken": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/hasPrivateToken",
          "spec_url": "https://wicg.github.io/trust-token-api/#dom-document-hasprivatetoken",
          "support": {
            "chrome": {
              "version_added": "117"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "hasRedemptionRecord": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/hasRedemptionRecord",
          "spec_url": "https://wicg.github.io/trust-token-api/#dom-document-hasredemptionrecord",
          "support": {
            "chrome": {
              "version_added": "117"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "hasStorageAccess": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/hasStorageAccess",
          "spec_url": "https://privacycg.github.io/storage-access/#dom-document-hasstorageaccess",
          "tags": [
            "web-features:storage-access"
          ],
          "support": {
            "chrome": {
              "version_added": "119"
            },
            "chrome_android": {
              "version_added": "120"
            },
            "edge": {
              "version_added": "85"
            },
            "firefox": {
              "version_added": "65"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "11.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "hasUnpartitionedCookieAccess": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/hasUnpartitionedCookieAccess",
          "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-document-hasunpartitionedcookieaccess",
          "tags": [
            "web-features:non-cookie-storage-access"
          ],
          "support": {
            "chrome": {
              "version_added": "125"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "head": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/head",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-head-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "4"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "4",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "11"
            },
            "opera_android": {
              "version_added": "11"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": {
              "version_added": "4"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "hidden": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/hidden",
          "spec_url": "https://html.spec.whatwg.org/multipage/interaction.html#dom-document-hidden",
          "tags": [
            "web-features:page-visibility"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "33"
              },
              {
                "prefix": "webkit",
                "version_added": "13"
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "18",
                "notes": "Since Firefox 56 it also returns `true` on macOS when the window is completely hidden by another non-translucent application."
              },
              {
                "prefix": "moz",
                "version_added": "10",
                "version_removed": "52"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "12.1"
            },
            "opera_android": {
              "version_added": "12.1"
            },
            "safari": {
              "version_added": "7"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "images": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/images",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-images-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "1",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "implementation": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/implementation",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-implementation①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "6"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "importNode": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/importNode",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-document-importnode①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "9"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "lastElementChild": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/lastElementChild",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-lastelementchild①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "29"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "17"
            },
            "firefox": {
              "version_added": "25"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "9"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "lastModified": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/lastModified",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-lastmodified-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "lastStyleSheetSet": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/lastStyleSheetSet",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "linkColor": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/linkColor",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-linkcolor",
          "tags": [
            "web-features:document-colors"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "64"
              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "11"
              },
              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "links": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/links",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-links-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "1",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "location": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/location",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#the-location-interface",
          "tags": [
            "web-features:location"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "1",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "moveBefore": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/moveBefore",
          "spec_url": "https://dom.spec.whatwg.org/#dom-parentnode-movebefore",
          "tags": [
            "web-features:move-before"
          ],
          "support": {
            "chrome": {
              "version_added": "133"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "144"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false,
              "impl_url": "https://webkit.org/b/281223"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "mozSetImageElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/mozSetImageElement",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "4"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": false
          }
        }
      },
      "open": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/open",
          "spec_url": "https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-open-dev",
          "tags": [
            "web-features:document-write"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "45"
              },
              {
                "version_added": "1",
                "version_removed": "45",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "11"
              },
              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "parseHTML_static": {
        "__compat": {
          "description": "`parseHTML` static method",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/parseHTML_static",
          "spec_url": "https://wicg.github.io/sanitizer-api/#dom-document-parsehtml",
          "tags": [
            "web-features:sanitizer"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "148"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "parseHTMLUnsafe_static": {
        "__compat": {
          "description": "`parseHTMLUnsafe()` static method",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/parseHTMLUnsafe_static",
          "spec_url": "https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-parsehtmlunsafe",
          "tags": [
            "web-features:parse-html-unsafe"
          ],
          "support": {
            "chrome": {
              "version_added": "124"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": [
              {
                "version_added": "128"
              },
              {
                "version_added": "123",
                "version_removed": "127",
                "partial_implementation": true,
                "notes": "Throws error `NS_ERROR_UNEXPECTED` ([bug 1887817](https://bugzil.la/1887817).)"
              }
            ],
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": [
              {
                "version_added": "26"
              },
              {
                "version_added": "17.4",
                "version_removed": "26",
                "partial_implementation": true,
                "notes": "If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and `connectedCallback()` methods are not called ([bug 296420](https://webkit.org/b/296420))."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "enforces_trusted_types": {
          "__compat": {
            "description": "Requires `TrustedHTML` instance when trusted types are enforced",
            "spec_url": "https://w3c.github.io/trusted-types/dist/spec/#dom-xss-injection-sinks",
            "tags": [
              "web-features:trusted-types"
            ],
            "support": {
              "chrome": {
                "version_added": "124"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "148"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "26"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "options_sanitizer_parameter": {
          "__compat": {
            "description": "`options.sanitizer` parameter",
            "spec_url": "https://wicg.github.io/sanitizer-api/#dom-shadowroot-sethtmlunsafe",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "preview"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": true,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "pictureInPictureElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/pictureInPictureElement",
          "spec_url": "https://w3c.github.io/picture-in-picture/#dom-documentorshadowroot-pictureinpictureelement",
          "tags": [
            "web-features:picture-in-picture"
          ],
          "support": {
            "chrome": {
              "version_added": "69"
            },
            "chrome_android": {
              "version_added": "105"
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1463402"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "13.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "pictureInPictureEnabled": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/pictureInPictureEnabled",
          "spec_url": "https://w3c.github.io/picture-in-picture/#dom-document-pictureinpictureenabled",
          "tags": [
            "web-features:picture-in-picture"
          ],
          "support": {
            "chrome": {
              "version_added": "69"
            },
            "chrome_android": {
              "version_added": "105"
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1463402"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "13.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "plugins": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/plugins",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-plugins-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "36"
              },
              {
                "version_added": "1",
                "version_removed": "36",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "1",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "10.1"
              },
              {
                "version_added": "3",
                "version_removed": "10.1",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": [
              {
                "version_added": "10.3"
              },
              {
                "version_added": "1",
                "version_removed": "10.3",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "pointerlockchange_event": {
        "__compat": {
          "description": "`pointerlockchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/pointerlockchange_event",
          "spec_url": [
            "https://w3c.github.io/pointerlock/#pointerlockchange-and-pointerlockerror-events",
            "https://w3c.github.io/pointerlock/#dom-document-onpointerlockchange"
          ],
          "tags": [
            "web-features:pointer-lock"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "36"
              },
              {
                "prefix": "webkit",
                "version_added": "22",
                "version_removed": "38"
              }
            ],
            "chrome_android": {
              "version_added": false,
              "impl_url": "https://crbug.com/40290045"
            },
            "edge": {
              "version_added": "13"
            },
            "firefox": [
              {
                "version_added": "50"
              },
              {
                "prefix": "moz",
                "version_added": "14",
                "version_removed": "50"
              }
            ],
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "pointerLockElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/pointerLockElement",
          "spec_url": "https://w3c.github.io/pointerlock/#dom-documentorshadowroot-pointerlockelement",
          "tags": [
            "web-features:pointer-lock"
          ],
          "support": {
            "chrome": {
              "version_added": "37"
            },
            "chrome_android": {
              "version_added": false,
              "impl_url": "https://crbug.com/40290045"
            },
            "edge": {
              "version_added": "13"
            },
            "firefox": [
              {
                "version_added": "50"
              },
              {
                "prefix": "moz",
                "version_added": "14",
                "version_removed": "50"
              }
            ],
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "pointerlockerror_event": {
        "__compat": {
          "description": "`pointerlockerror` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/pointerlockerror_event",
          "spec_url": [
            "https://w3c.github.io/pointerlock/#pointerlockchange-and-pointerlockerror-events",
            "https://w3c.github.io/pointerlock/#dom-document-onpointerlockerror"
          ],
          "tags": [
            "web-features:pointer-lock"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "36"
              },
              {
                "prefix": "webkit",
                "version_added": "22",
                "version_removed": "38"
              }
            ],
            "chrome_android": {
              "version_added": false,
              "impl_url": "https://crbug.com/40290045"
            },
            "edge": {
              "version_added": "13"
            },
            "firefox": [
              {
                "version_added": "50"
              },
              {
                "prefix": "moz",
                "version_added": "14",
                "version_removed": "50"
              }
            ],
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "preferredStyleSheetSet": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/preferredStyleSheetSet",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "prepend": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/prepend",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-prepend①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "54"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "17"
            },
            "firefox": {
              "version_added": "49"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "prerendering": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/prerendering",
          "spec_url": "https://wicg.github.io/nav-speculation/prerendering.html#dom-document-prerendering",
          "tags": [
            "web-features:speculation-rules"
          ],
          "support": {
            "chrome": {
              "version_added": "108"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "prerenderingchange_event": {
        "__compat": {
          "description": "`prerenderingchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/prerenderingchange_event",
          "spec_url": [
            "https://wicg.github.io/nav-speculation/prerendering.html#eventdef-document-prerenderingchange",
            "https://wicg.github.io/nav-speculation/prerendering.html#dom-document-onprerenderingchange"
          ],
          "tags": [
            "web-features:speculation-rules"
          ],
          "support": {
            "chrome": {
              "version_added": "108"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "queryCommandEnabled": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/queryCommandEnabled",
          "tags": [
            "web-features:execcommand"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "41",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              },
              {
                "version_added": "1",
                "version_removed": "41",
                "partial_implementation": true,
                "notes": [
                  "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects.",
                  "`queryCommandEnabled` with arguments `cut`, `copy` or `paste` would throw errors unless the script had special privileges."
                ]
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "queryCommandIndeterm": {
        "__compat": {
          "tags": [
            "web-features:execcommand"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "queryCommandState": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/queryCommandState",
          "tags": [
            "web-features:execcommand"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "queryCommandSupported": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/queryCommandSupported",
          "tags": [
            "web-features:execcommand"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "41",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              },
              {
                "version_added": "1",
                "version_removed": "41",
                "partial_implementation": true,
                "notes": [
                  "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects.",
                  "The `\"paste\"` command is reported as supported when the paste feature is available even if the calling script has insufficient privileges to actually perform the action."
                ]
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "queryCommandValue": {
        "__compat": {
          "tags": [
            "web-features:execcommand"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "69"
              },
              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "querySelector": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/querySelector",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-queryselector①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3.5"
            },
            "firefox_android": "mirror",
            "ie": [
              {
                "version_added": "9"
              },
              {
                "version_added": "8",
                "version_removed": "9",
                "partial_implementation": true,
                "notes": "`querySelector()` is supported, but only for CSS 2.1 selectors."
              }
            ],
            "oculus": "mirror",
            "opera": {
              "version_added": "10"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "3.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "querySelectorAll": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/querySelectorAll",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-queryselectorall①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3.5"
            },
            "firefox_android": "mirror",
            "ie": [
              {
                "version_added": "9"
              },
              {
                "version_added": "8",
                "version_removed": "9",
                "partial_implementation": true,
                "notes": "`querySelectorAll()` is supported, but only for CSS 2.1 selectors."
              }
            ],
            "oculus": "mirror",
            "opera": {
              "version_added": "10"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "3.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "readyState": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/readyState",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#current-document-readiness",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3.6"
            },
            "firefox_android": "mirror",
            "ie": [
              {
                "version_added": "11"
              },
              {
                "version_added": "9",
                "version_removed": "11",
                "notes": "Internet Explorer 9 and 10 have bugs where the 'interactive' state can be fired too early before the document has finished parsing."
              },
              {
                "version_added": "4",
                "version_removed": "9",
                "partial_implementation": true,
                "notes": "Only supports 'complete'."
              }
            ],
            "oculus": "mirror",
            "opera": {
              "version_added": "11",
              "notes": "Opera Presto fires 'complete' late after the 'load' event (in an incorrect order as per HTML5 standard specification)."
            },
            "opera_android": {
              "version_added": "11",
              "notes": "Opera Presto fires 'complete' late after the 'load' event (in an incorrect order as per HTML5 standard specification)."
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "readystatechange_event": {
        "__compat": {
          "description": "`readystatechange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/readystatechange_event",
          "spec_url": "https://html.spec.whatwg.org/multipage/indices.html#event-readystatechange",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "9"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "4"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "5.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "referrer": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/referrer",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-referrer-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "releaseCapture": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/releaseCapture",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "4"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": false
          }
        }
      },
      "releaseEvents": {
        "__compat": {
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-releaseevents",
          "support": {
            "chrome": [
              {
                "version_added": "64"
              },
              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "70"
              },
              {
                "version_added": "1",
                "version_removed": "70",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "51"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "51",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "opera_android": [
              {
                "version_added": "47"
              },
              {
                "version_added": "≤12.1",
                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari": [
              {
                "version_added": "11"
              },
              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "replaceChildren": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/replaceChildren",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-replacechildren①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "86"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "78"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "14"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "requestStorageAccess": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/requestStorageAccess",
          "spec_url": "https://privacycg.github.io/storage-access/#dom-document-requeststorageaccess",
          "tags": [
            "web-features:storage-access"
          ],
          "support": {
            "chrome": {
              "version_added": "119"
            },
            "chrome_android": {
              "version_added": "120"
            },
            "edge": {
              "version_added": "85"
            },
            "firefox": {
              "version_added": "65"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "11.1",
              "notes": "Client-side storage access is granted per-page ([see explanation](https://developer.mozilla.org/docs/Web/API/Storage_Access_API#how_it_works:~:text=In%20older%20spec%20versions%2C%20the%20access%20was%20per%2Dpage))."
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "strict_same_origin_policy": {
          "__compat": {
            "description": "Third-party cookies sent only with requests to the calling embed's exact origin, not the whole site.",
            "spec_url": "https://privacycg.github.io/storage-access/#dom-document-requeststorageaccess:~:text=is%20not%20same%20origin",
            "tags": [
              "web-features:storage-access"
            ],
            "support": {
              "chrome": {
                "version_added": "141"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "140"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": {
                "version_added": false
              },
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "types_parameter": {
          "__compat": {
            "description": "`types` parameter",
            "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dictdef-storageaccesstypes",
            "tags": [
              "web-features:non-cookie-storage-access"
            ],
            "support": {
              "chrome": {
                "version_added": "125"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": {
                "version_added": false
              },
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "types_all_parameter": {
            "__compat": {
              "description": "`types.all` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-all",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_BroadcastChannel_parameter": {
            "__compat": {
              "description": "`types.BroadcastChannel` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-broadcastchannel",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_caches_parameter": {
            "__compat": {
              "description": "`types.caches` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-caches",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_cookies_parameter": {
            "__compat": {
              "description": "`types.cookies` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-cookies",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_createObjectURL_parameter": {
            "__compat": {
              "description": "`types.createObjectURL` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-createobjecturl",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_estimate_parameter": {
            "__compat": {
              "description": "`types.estimate` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-estimate",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_getDirectory_parameter": {
            "__compat": {
              "description": "`types.getDirectory` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-getdirectory",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_indexedDB_parameter": {
            "__compat": {
              "description": "`types.indexedDB` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-indexeddb",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_localStorage_parameter": {
            "__compat": {
              "description": "`types.localStorage` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-localstorage",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_locks_parameter": {
            "__compat": {
              "description": "`types.locks` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-locks",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_revokeObjectURL_parameter": {
            "__compat": {
              "description": "`types.revokeObjectURL` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-revokeobjecturl",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_sessionStorage_parameter": {
            "__compat": {
              "description": "`types.sessionStorage` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-sessionstorage",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                  "version_added": false
                },
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "types_SharedWorker_parameter": {
            "__compat": {
              "description": "`types.SharedWorker` parameter",
              "spec_url": "https://privacycg.github.io/saa-non-cookie-storage/#dom-storageaccesstypes-sharedworker",
              "tags": [
                "web-features:non-cookie-storage-access"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": {
                  "version_added": false
                },
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          }
        }
      },
      "requestStorageAccessFor": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/requestStorageAccessFor",
          "tags": [
            "web-features:related-website-sets"
          ],
          "support": {
            "chrome": {
              "version_added": "119",
              "notes": "Requires the calling top-level page and the embedded document (that the storage access is being requested for) to be part of the same [related website set](https://developer.mozilla.org/docs/Web/API/Storage_Access_API/Related_website_sets)."
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "resume_event": {
        "__compat": {
          "description": "`resume` event",
          "spec_url": "https://wicg.github.io/page-lifecycle/#dom-document-onresume",
          "tags": [
            "web-features:page-lifecycle"
          ],
          "support": {
            "chrome": {
              "version_added": "68"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "rootElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/rootElement",
          "spec_url": "https://w3c.github.io/svgwg/svg2-draft/struct.html#__svg__SVGDocument__rootElement",
          "support": {
            "chrome": {
              "version_added": "34"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "52"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "scripts": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/scripts",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-scripts-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "36"
              },
              {
                "version_added": "1",
                "version_removed": "36",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "61"
              },
              {
                "version_added": "9",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "10.1"
              },
              {
                "version_added": "1",
                "version_removed": "10.1",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "scroll_event": {
        "__compat": {
          "description": "`scroll` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/scroll_event",
          "spec_url": [
            "https://drafts.csswg.org/cssom-view/#eventdef-document-scroll",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-onscroll"
          ],
          "tags": [
            "web-features:scroll-elements"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "11.6"
            },
            "opera_android": {
              "version_added": "12"
            },
            "safari": {
              "version_added": "2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "scrollend_event": {
        "__compat": {
          "description": "`scrollend` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/scrollend_event",
          "spec_url": [
            "https://drafts.csswg.org/cssom-view/#eventdef-document-scrollend",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-onscrollend"
          ],
          "tags": [
            "web-features:scrollend"
          ],
          "support": {
            "chrome": {
              "version_added": "114"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "109"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "26.2"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "scrollingElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/scrollingElement",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement",
          "tags": [
            "web-features:scroll-elements"
          ],
          "support": {
            "chrome": {
              "version_added": "44"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "48"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "9"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "scrollsnapchange_event": {
        "__compat": {
          "description": "`scrollsnapchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/scrollsnapchange_event",
          "spec_url": "https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchange",
          "tags": [
            "web-features:scroll-snap-events"
          ],
          "support": {
            "chrome": {
              "version_added": "129"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1843961"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "scrollsnapchanging_event": {
        "__compat": {
          "description": "`scrollsnapchanging` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/scrollsnapchanging_event",
          "spec_url": "https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchanging",
          "tags": [
            "web-features:scroll-snap-events"
          ],
          "support": {
            "chrome": {
              "version_added": "129"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1843961"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "securitypolicyviolation_event": {
        "__compat": {
          "description": "`securitypolicyviolation` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/securitypolicyviolation_event",
          "spec_url": "https://html.spec.whatwg.org/multipage/webappapis.html#handler-onsecuritypolicyviolation",
          "tags": [
            "web-features:csp"
          ],
          "support": {
            "chrome": {
              "version_added": "76"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "93"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "15.4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "selectedStyleSheetSet": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/selectedStyleSheetSet",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "selectionchange_event": {
        "__compat": {
          "description": "`selectionchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/selectionchange_event",
          "spec_url": [
            "https://w3c.github.io/selection-api/#selectionchange-event",
            "https://w3c.github.io/selection-api/#dom-globaleventhandlers-onselectionchange"
          ],
          "tags": [
            "web-features:selection-api"
          ],
          "support": {
            "chrome": {
              "version_added": "11"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "52"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5.5"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "5.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "startViewTransition": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/startViewTransition",
          "spec_url": [
            "https://drafts.csswg.org/css-view-transitions-1/#dom-document-startviewtransition",
            "https://drafts.csswg.org/css-view-transitions-2/#dom-document-startviewtransition"
          ],
          "tags": [
            "web-features:view-transitions"
          ],
          "support": {
            "chrome": {
              "version_added": "111"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "144"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "18"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "options_parameter": {
          "__compat": {
            "description": "`options` parameter",
            "spec_url": "https://drafts.csswg.org/css-view-transitions-2/#dictdef-startviewtransitionoptions",
            "tags": [
              "web-features:view-transitions"
            ],
            "support": {
              "chrome": {
                "version_added": "125"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "18.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "types_parameter": {
            "__compat": {
              "description": "`options.types` parameter",
              "spec_url": "https://drafts.csswg.org/css-view-transitions-2/#dom-startviewtransitionoptions-types",
              "tags": [
                "web-features:view-transitions"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "147"
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "18.2"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "update_parameter": {
            "__compat": {
              "description": "`options.update` parameter",
              "spec_url": "https://drafts.csswg.org/css-view-transitions-2/#dom-startviewtransitionoptions-update",
              "tags": [
                "web-features:view-transitions"
              ],
              "support": {
                "chrome": {
                  "version_added": "125"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "147"
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "18.2"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          }
        },
        "updateCallback_parameter": {
          "__compat": {
            "description": "`updateCallback` parameter",
            "spec_url": "https://drafts.csswg.org/css-view-transitions-2/#callbackdef-viewtransitionupdatecallback",
            "tags": [
              "web-features:view-transitions"
            ],
            "support": {
              "chrome": {
                "version_added": "111"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": [
                {
                  "version_added": "preview"
                },
                {
                  "version_added": "140",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "dom.viewTransitions.enabled",
                      "value_to_set": "true"
                    }
                  ]
                }
              ],
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "18"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "styleSheets": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/styleSheets",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-documentorshadowroot-stylesheets",
          "tags": [
            "web-features:css-object-model"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "styleSheetSets": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/styleSheetSets",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "3"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "timeline": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/timeline",
          "spec_url": "https://drafts.csswg.org/web-animations-1/#dom-document-timeline",
          "tags": [
            "web-features:web-animations"
          ],
          "support": {
            "chrome": {
              "version_added": "84"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "75"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "13.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "title": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/title",
          "spec_url": "https://html.spec.whatwg.org/multipage/dom.html#document.title",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": [
              {
                "version_added": "4"
              },
              {
                "version_added": "3",
                "version_removed": "4",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument) and `XMLDocument`, but not `SVGDocument` objects."
              },
              {
                "version_added": "1",
                "version_removed": "3",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "visibilitychange_event": {
        "__compat": {
          "description": "`visibilitychange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/visibilitychange_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-visibilitychange",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-onvisibilitychange"
          ],
          "tags": [
            "web-features:page-visibility"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "62"
              },
              {
                "prefix": "webkit",
                "version_added": "13",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              },
              {
                "version_added": "33",
                "version_removed": "62",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              }
            ],
            "chrome_android": "mirror",
            "edge": [
              {
                "version_added": "18"
              },
              {
                "version_added": "12",
                "version_removed": "18",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              }
            ],
            "firefox": {
              "version_added": "56"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10",
              "partial_implementation": true,
              "notes": "The `onvisibilitychange` event handler property is not supported."
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "49"
              },
              {
                "prefix": "webkit",
                "version_added": "15",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              },
              {
                "version_added": "20",
                "version_removed": "49",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              },
              {
                "version_added": "12.1",
                "version_removed": "15",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              }
            ],
            "opera_android": [
              {
                "version_added": "46"
              },
              {
                "prefix": "webkit",
                "version_added": "14",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              },
              {
                "version_added": "20",
                "version_removed": "46",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              },
              {
                "version_added": "12.1",
                "version_removed": "14",
                "partial_implementation": true,
                "notes": "The `onvisibilitychange` event handler property is not supported."
              }
            ],
            "safari": [
              {
                "version_added": "14.1"
              },
              {
                "version_added": "14",
                "version_removed": "14.1",
                "partial_implementation": true,
                "notes": "Doesn't fire the `visibilitychange` event when navigating away from a document, so also include code to check for the `pagehide` event (which does fire for that case in all current browsers). See [bug 116769](https://webkit.org/b/116769), [bug 151234](https://webkit.org/b/151234), [bug 151610](https://webkit.org/b/151610), and [bug 194897](https://webkit.org/b/194897)."
              },
              {
                "version_added": "10.1",
                "version_removed": "14",
                "partial_implementation": true,
                "notes": [
                  "Doesn't fire the `visibilitychange` event when navigating away from a document, so also include code to check for the `pagehide` event (which does fire for that case in all current browsers). See [bug 116769](https://webkit.org/b/116769), [bug 151234](https://webkit.org/b/151234), [bug 151610](https://webkit.org/b/151610), and [bug 194897](https://webkit.org/b/194897).",
                  "Before Safari 14, the event does not bubble, so `document.addEventListener('visibilitychange', ...)` works, but `window.addEventListener('visibilitychange', ...)` does not."
                ]
              },
              {
                "version_added": "7",
                "version_removed": "10.1",
                "partial_implementation": true,
                "notes": [
                  "Doesn't fire the `visibilitychange` event when navigating away from a document, so also include code to check for the `pagehide` event (which does fire for that case in all current browsers). See [bug 116769](https://webkit.org/b/116769), [bug 151234](https://webkit.org/b/151234), [bug 151610](https://webkit.org/b/151610), and [bug 194897](https://webkit.org/b/194897).",
                  "Before Safari 14, the event does not bubble, so `document.addEventListener('visibilitychange', ...)` works, but `window.addEventListener('visibilitychange', ...)` does not.",
                  "The `onvisibilitychange` event handler property is not supported."
                ]
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "visibilityState": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/visibilityState",
          "spec_url": "https://html.spec.whatwg.org/multipage/interaction.html#dom-document-visibilitystate",
          "tags": [
            "web-features:page-visibility"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "33"
              },
              {
                "prefix": "webkit",
                "version_added": "13"
              }
            ],
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "18"
              },
              {
                "prefix": "moz",
                "version_added": "10",
                "version_removed": "52"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "20"
              },
              {
                "prefix": "webkit",
                "version_added": "15"
              },
              {
                "version_added": "12.1",
                "version_removed": "15"
              }
            ],
            "opera_android": [
              {
                "version_added": "20"
              },
              {
                "prefix": "webkit",
                "version_added": "14"
              },
              {
                "version_added": "12.1",
                "version_removed": "14"
              }
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
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            "experimental": false,
            "standard_track": true,
            "deprecated": false
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        }
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/vlinkColor",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-document-vlinkcolor",
          "tags": [
            "web-features:document-colors"
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              {
                "version_added": "1",
                "version_removed": "64",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              {
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                "version_removed": "47",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "version_added": "1",
                "version_removed": "11",
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                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
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                "version_removed": "45",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              "version_added": "4"
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              {
                "version_added": "1",
                "version_removed": "11",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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            "webview_android": "mirror",
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            "deprecated": true
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              "edge": "mirror",
              "firefox": {
                "version_added": "148"
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              "oculus": "mirror",
              "opera": "mirror",
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                "version_added": "26"
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              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
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          "spec_url": "https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-writeln-dev",
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              {
                "version_added": "1",
                "version_removed": "45",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              {
                "version_added": "1",
                "version_removed": "69",
                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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                "partial_implementation": true,
                "notes": "Only supported for [`HTMLDocument`](https://developer.mozilla.org/docs/Web/API/HTMLDocument), not all `Document` objects."
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              "edge": "mirror",
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              "version_added": "1"
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