{
  "api": {
    "Window": {
      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window",
        "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#the-window-object",
        "tags": [
          "web-features:window"
        ],
        "support": {
          "chrome": {
            "version_added": "1"
          },
          "chrome_android": "mirror",
          "deno": {
            "version_added": "1.0"
          },
          "edge": {
            "version_added": "12"
          },
          "firefox": {
            "version_added": "1"
          },
          "firefox_android": "mirror",
          "ie": {
            "version_added": "4"
          },
          "nodejs": {
            "version_added": "0.10.0",
            "partial_implementation": true,
            "notes": "The `Window` interface is not implemented, but some methods, and properties are available in the global scope."
          },
          "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
        }
      },
      "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/indices.html#event-domcontentloaded",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "afterprint_event": {
        "__compat": {
          "description": "`afterprint` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/afterprint_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-afterprint",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onafterprint"
          ],
          "tags": [
            "web-features:print-events"
          ],
          "support": {
            "chrome": {
              "version_added": "63"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "13"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "alert": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/alert",
          "spec_url": "https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-alert-dev",
          "tags": [
            "web-features:alerts"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.5"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "opera_android": {
              "version_added": "10.1",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "appinstalled_event": {
        "__compat": {
          "description": "`appinstalled` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/appinstalled_event",
          "spec_url": "https://wicg.github.io/manifest-incubations/#dom-window-onappinstalled",
          "tags": [
            "web-features:beforeinstallprompt"
          ],
          "support": {
            "chrome": {
              "version_added": "64"
            },
            "chrome_android": {
              "version_added": "57"
            },
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": {
              "version_added": false,
              "notes": "Opera exposes the `onappinstalled` event handler, but the event is never fired."
            },
            "opera_android": {
              "version_added": false,
              "notes": "Opera exposes the `onappinstalled` event handler, but the event is never fired."
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "beforeinstallprompt_event": {
        "__compat": {
          "description": "`beforeinstallprompt` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/beforeinstallprompt_event",
          "spec_url": "https://wicg.github.io/manifest-incubations/#onbeforeinstallprompt-attribute",
          "tags": [
            "web-features:beforeinstallprompt"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "61"
              },
              {
                "version_added": "44",
                "version_removed": "61",
                "partial_implementation": true,
                "notes": "The `onbeforeinstallprompt` event handler property is not supported."
              }
            ],
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": [
              {
                "version_added": "8.0"
              },
              {
                "version_added": "5.0",
                "version_removed": "8.0",
                "partial_implementation": true,
                "notes": "The `onbeforeinstallprompt` event handler property is not supported."
              }
            ],
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "beforeprint_event": {
        "__compat": {
          "description": "`beforeprint` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/beforeprint_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-beforeprint",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onbeforeprint"
          ],
          "tags": [
            "web-features:print-events"
          ],
          "support": {
            "chrome": {
              "version_added": "63"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "13"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "beforeunload_event": {
        "__compat": {
          "description": "`beforeunload` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/beforeunload_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-beforeunload",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onbeforeunload"
          ],
          "tags": [
            "web-features:beforeunload"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.27"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "12"
            },
            "opera_android": {
              "version_added": "12"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": false,
              "impl_url": "https://webkit.org/b/219102"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "event_returnvalue_activation": {
          "__compat": {
            "description": "Activation by setting `event.returnValue` to any truthy value",
            "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-beforeunloadevent-returnvalue",
            "support": {
              "chrome": [
                {
                  "version_added": "119"
                },
                {
                  "version_added": "30",
                  "version_removed": "119",
                  "partial_implementation": true,
                  "notes": "Before Chrome 119, an empty string incorrectly activated the confirmation dialog."
                }
              ],
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "6"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "8"
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "generic_string_displayed": {
          "__compat": {
            "description": "Dialog displays a generic string, not event handler return value",
            "support": {
              "chrome": {
                "version_added": "51"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "44"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "11"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "9.1"
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        },
        "preventdefault_activation": {
          "__compat": {
            "description": "Activation using `event.preventDefault()`",
            "spec_url": "https://dom.spec.whatwg.org/#dom-event-preventdefault",
            "tags": [
              "web-features:beforeunload"
            ],
            "support": {
              "chrome": {
                "version_added": "119"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": [
                {
                  "version_added": "119"
                },
                {
                  "version_added": "12",
                  "version_removed": "79"
                }
              ],
              "firefox": {
                "version_added": "6"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "11"
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "return_string_activation": {
          "__compat": {
            "description": "Activation by returning a string",
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "12"
              },
              "opera_android": {
                "version_added": "12"
              },
              "safari": {
                "version_added": "3"
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        }
      },
      "blur": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/blur",
          "spec_url": "https://html.spec.whatwg.org/multipage/interaction.html#dom-window-blur",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "blur_event": {
        "__compat": {
          "description": "`blur` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/blur_event",
          "spec_url": [
            "https://w3c.github.io/uievents/#event-type-blur",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-onblur"
          ],
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "5"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6",
              "notes": [
                "Apart from firing the event on `window` as other browsers do, Firefox also fires the event on the `document` object. See [bug 1228802](https://bugzil.la/1228802).",
                "Before Firefox 24, the interface for this event is a plain [`Event`](https://developer.mozilla.org/docs/Web/API/Event), not [`FocusEvent`](https://developer.mozilla.org/docs/Web/API/FocusEvent)."
              ]
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "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
          }
        }
      },
      "cancelAnimationFrame": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/cancelAnimationFrame",
          "spec_url": "https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#animationframeprovider-cancelanimationframe",
          "tags": [
            "web-features:request-animation-frame"
          ],
          "support": {
            "chrome": {
              "version_added": "24"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "23"
              },
              {
                "prefix": "moz",
                "version_added": "11",
                "version_removed": "23"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": [
              {
                "version_added": "7"
              },
              {
                "prefix": "webkit",
                "version_added": "6",
                "version_removed": "7"
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "cancelIdleCallback": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/cancelIdleCallback",
          "spec_url": "https://w3c.github.io/requestidlecallback/#the-cancelidlecallback-method",
          "tags": [
            "web-features:requestidlecallback"
          ],
          "support": {
            "chrome": {
              "version_added": "47"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "55"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false,
              "impl_url": "https://webkit.org/b/164193"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "captureEvents": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/captureEvents",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-window-captureevents",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "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
          }
        }
      },
      "clearImmediate": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/clearImmediate",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12",
              "version_removed": "79"
            },
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "nodejs": {
              "version_added": "0.10.0",
              "partial_implementation": true,
              "notes": "Takes an `Immediate` object instead of the `immediateID`."
            },
            "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
          }
        }
      },
      "close": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/close",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-close-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Before Chrome 95, script-closeability depended on having an opener, not on being created by web content."
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.0",
              "partial_implementation": true,
              "notes": "Exits the current Deno process."
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Before Firefox 128, script-closeability depended on having an opener, not on being created by web content."
            },
            "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
          }
        }
      },
      "closed": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/closed",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-closed-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.0"
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "confirm": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/confirm",
          "spec_url": "https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-confirm-dev",
          "tags": [
            "web-features:alerts"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.5"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "opera_android": {
              "version_added": "10.1",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "1",
              "notes": "Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "cookieStore": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/cookieStore",
          "spec_url": "https://cookiestore.spec.whatwg.org/#dom-window-cookiestore",
          "tags": [
            "web-features:cookie-store"
          ],
          "support": {
            "chrome": {
              "version_added": "87"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "140"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "18.4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "crashReport": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/crashReport",
          "spec_url": "https://wicg.github.io/crash-reporting/#dom-window-crashreport",
          "support": {
            "chrome": {
              "version_added": "145"
            },
            "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
          }
        }
      },
      "credentialless": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/credentialless",
          "spec_url": "https://wicg.github.io/anonymous-iframe/#dom-window-credentialless",
          "tags": [
            "web-features:iframe-credentialless"
          ],
          "support": {
            "chrome": {
              "version_added": "110"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "customElements": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/customElements",
          "spec_url": "https://html.spec.whatwg.org/multipage/custom-elements.html#dom-window-customelements",
          "tags": [
            "web-features:autonomous-custom-elements"
          ],
          "support": {
            "chrome": {
              "version_added": "54"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "63"
            },
            "firefox_android": "mirror",
            "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": false
          }
        }
      },
      "devicemotion_event": {
        "__compat": {
          "description": "`devicemotion` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/devicemotion_event",
          "spec_url": [
            "https://w3c.github.io/deviceorientation/#devicemotion",
            "https://w3c.github.io/deviceorientation/#dom-window-ondevicemotion"
          ],
          "tags": [
            "web-features:device-orientation-events"
          ],
          "support": {
            "chrome": {
              "version_added": "31"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "17"
            },
            "safari_ios": {
              "version_added": "4.2"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "deviceorientation_event": {
        "__compat": {
          "description": "`deviceorientation` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/deviceorientation_event",
          "spec_url": [
            "https://w3c.github.io/deviceorientation/#deviceorientation",
            "https://w3c.github.io/deviceorientation/#dom-window-ondeviceorientation"
          ],
          "tags": [
            "web-features:device-orientation-events"
          ],
          "support": {
            "chrome": {
              "version_added": "7"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "6"
              },
              {
                "alternative_name": "mozOrientation",
                "version_added": "3.6",
                "version_removed": "6"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "12"
            },
            "opera_android": {
              "version_added": "12"
            },
            "safari": {
              "version_added": "17"
            },
            "safari_ios": {
              "version_added": "4.2"
            },
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "3"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "deviceorientationabsolute_event": {
        "__compat": {
          "description": "`deviceorientationabsolute` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/deviceorientationabsolute_event",
          "spec_url": "https://w3c.github.io/deviceorientation/#dom-window-ondeviceorientationabsolute",
          "tags": [
            "web-features:device-orientation-events"
          ],
          "support": {
            "chrome": {
              "version_added": "50"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "110"
            },
            "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
          }
        }
      },
      "devicePixelRatio": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/devicePixelRatio",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-devicepixelratio",
          "tags": [
            "web-features:devicepixelratio"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "18"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "11.1"
            },
            "opera_android": {
              "version_added": "11.1"
            },
            "safari": {
              "version_added": "3",
              "partial_implementation": true,
              "notes": "In Safari, the `devicePixelRatio` does not change when the page is zoomed. See [bug 124862](https://webkit.org/b/124862)."
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "document": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/document",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-document-dev",
          "tags": [
            "web-features:dom"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "documentPictureInPicture": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/documentPictureInPicture",
          "spec_url": "https://wicg.github.io/document-picture-in-picture/#dom-window-documentpictureinpicture",
          "tags": [
            "web-features:document-picture-in-picture"
          ],
          "support": {
            "chrome": {
              "version_added": "116"
            },
            "chrome_android": {
              "version_added": false
            },
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "151"
            },
            "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
          }
        }
      },
      "dump": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/dump",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": [
              {
                "version_added": "1.5",
                "partial_implementation": true,
                "notes": "By default, this method exists and can be called, but does nothing unless enabled in the browser's preferences."
              },
              {
                "version_added": "1.5",
                "flags": [
                  {
                    "type": "preference",
                    "name": "browser.dom.window.dump.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": "4",
              "partial_implementation": true,
              "notes": "This method exists but has no effect."
            },
            "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
          }
        }
      },
      "error_event": {
        "__compat": {
          "description": "`error` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/error_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-error",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-onerror"
          ],
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "10"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.21"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "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
          }
        }
      },
      "event": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/event",
          "spec_url": "https://dom.spec.whatwg.org/#dom-window-event",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "66"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "7"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "external": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/external",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#external",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": [
              {
                "version_added": "2",
                "notes": "From Firefox 78 `AddSearchProvider()` does nothing, as the specification requires."
              },
              {
                "alternative_name": "sidebar",
                "version_added": "1",
                "version_removed": "102"
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "4.4.3"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "fence": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/fence",
          "spec_url": "https://wicg.github.io/fenced-frame/#dom-window-fence",
          "tags": [
            "web-features:fencedframe"
          ],
          "support": {
            "chrome": {
              "version_added": "126"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "fetchLater": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/fetchLater",
          "spec_url": "https://fetch.spec.whatwg.org/#deferred-fetch",
          "tags": [
            "web-features:fetchlater"
          ],
          "support": {
            "chrome": {
              "version_added": "135"
            },
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            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1936180"
            },
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            "oculus": "mirror",
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            "opera_android": "mirror",
            "safari": {
              "version_added": false,
              "impl_url": "https://webkit.org/b/284347"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
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      "find": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/find",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": false
          }
        }
      },
      "focus": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/focus",
          "spec_url": "https://html.spec.whatwg.org/multipage/interaction.html#dom-window-focus-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Starting in Chrome 66, opening a popup in fullscreen mode and calling this function will end fullscreen mode."
            },
            "chrome_android": {
              "version_added": "18"
            },
            "deno": {
              "version_added": false
            },
            "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": "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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        "__compat": {
          "description": "`focus` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/focus_event",
          "spec_url": [
            "https://w3c.github.io/uievents/#event-type-focus",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-onfocus"
          ],
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "5"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6",
              "notes": [
                "Apart from firing the event on `window` as other browsers do, Firefox also fires the event on the `document` object. See [bug 1228802](https://bugzil.la/1228802).",
                "Before Firefox 24, the interface for this event is a plain [`Event`](https://developer.mozilla.org/docs/Web/API/Event), not [`FocusEvent`](https://developer.mozilla.org/docs/Web/API/FocusEvent)."
              ]
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "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
          }
        }
      },
      "frameElement": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/frameElement",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-frameelement-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5.5"
            },
            "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
          }
        }
      },
      "frames": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/frames",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-frames-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "fullScreen": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/fullScreen",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "1"
            },
            "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
          }
        }
      },
      "gamepadconnected_event": {
        "__compat": {
          "description": "`gamepadconnected` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/gamepadconnected_event",
          "spec_url": "https://w3c.github.io/gamepad/#event-gamepadconnected",
          "tags": [
            "web-features:gamepad"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "143"
              },
              {
                "version_added": "35",
                "version_removed": "143",
                "partial_implementation": true,
                "notes": "The `ongamepadconnected` event handler property is not supported. See [bug 40175074](https://crbug.com/40175074)."
              }
            ],
            "chrome_android": [
              {
                "version_added": "143"
              },
              {
                "version_added": "37",
                "version_removed": "143",
                "partial_implementation": true,
                "notes": "The `ongamepadconnected` event handler property is not supported. See [bug 40175074](https://crbug.com/40175074)."
              }
            ],
            "deno": {
              "version_added": false
            },
            "edge": [
              {
                "version_added": "143"
              },
              {
                "version_added": "≤18",
                "version_removed": "143",
                "partial_implementation": true,
                "notes": "The `ongamepadconnected` event handler property is not supported. See [bug 40175074](https://crbug.com/40175074)."
              }
            ],
            "firefox": [
              {
                "version_added": "89"
              },
              {
                "version_added": "29",
                "version_removed": "89",
                "partial_implementation": true,
                "notes": "The `ongamepadconnected` event handler property is not supported. See [bug 1697093](https://bugzil.la/1697093)."
              }
            ],
            "firefox_android": [
              {
                "version_added": "89"
              },
              {
                "version_added": "32",
                "version_removed": "89",
                "partial_implementation": true,
                "notes": "The `ongamepadconnected` event handler property is not supported. See [bug 1697093](https://bugzil.la/1697093)."
              }
            ],
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": [
              {
                "version_added": "16"
              },
              {
                "version_added": "10.1",
                "version_removed": "16",
                "partial_implementation": true,
                "notes": "The `ongamepadconnected` event handler property is not supported. See [bug 223860](https://webkit.org/b/223860)."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "gamepaddisconnected_event": {
        "__compat": {
          "description": "`gamepaddisconnected` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/gamepaddisconnected_event",
          "spec_url": "https://w3c.github.io/gamepad/#event-gamepaddisconnected",
          "tags": [
            "web-features:gamepad"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "143"
              },
              {
                "version_added": "35",
                "version_removed": "143",
                "partial_implementation": true,
                "notes": "The `ongamepaddisconnected` event handler property is not supported. See [bug 40175074](https://crbug.com/40175074)."
              }
            ],
            "chrome_android": [
              {
                "version_added": "143"
              },
              {
                "version_added": "37",
                "version_removed": "143",
                "partial_implementation": true,
                "notes": "The `ongamepaddisconnected` event handler property is not supported. See [bug 40175074](https://crbug.com/40175074)."
              }
            ],
            "deno": {
              "version_added": false
            },
            "edge": [
              {
                "version_added": "143"
              },
              {
                "version_added": "≤18",
                "version_removed": "143",
                "partial_implementation": true,
                "notes": "The `ongamepaddisconnected` event handler property is not supported. See [bug 40175074](https://crbug.com/40175074)."
              }
            ],
            "firefox": [
              {
                "version_added": "89"
              },
              {
                "version_added": "29",
                "version_removed": "89",
                "partial_implementation": true,
                "notes": "The `ongamepaddisconnected` event handler property is not supported. See [bug 1697093](https://bugzil.la/1697093)."
              }
            ],
            "firefox_android": [
              {
                "version_added": "89"
              },
              {
                "version_added": "32",
                "version_removed": "89",
                "partial_implementation": true,
                "notes": "The `ongamepaddisconnected` event handler property is not supported. See [bug 1697093](https://bugzil.la/1697093)."
              }
            ],
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": [
              {
                "version_added": "16"
              },
              {
                "version_added": "10.1",
                "version_removed": "16",
                "partial_implementation": true,
                "notes": "The `ongamepaddisconnected` event handler property is not supported. See [bug 223860](https://webkit.org/b/223860)."
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "getComputedStyle": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/getComputedStyle",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle",
          "tags": [
            "web-features:get-computed-style"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Before version 62 this function returned `null` when called on a Window with no presentation (e.g. an iframe with `display: none;` set). Since 62 it returns a `CSSStyleDeclaration` object with `length` 0, containing empty strings ([bug 1467722](https://bugzil.la/1467722); also see [bug 1471231](https://bugzil.la/1471231) for further work)."
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "7.2"
            },
            "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
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        },
        "pseudo_element_support": {
          "__compat": {
            "description": "Pseudo-element support",
            "spec_url": "https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle-elt-pseudoelt-pseudoelt",
            "tags": [
              "web-features:get-computed-style"
            ],
            "support": {
              "chrome": {
                "version_added": "11"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "3.5"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "≤15"
              },
              "opera_android": {
                "version_added": "≤14"
              },
              "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
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          }
        },
        "returns_CSSStyleProperties": {
          "__compat": {
            "description": "Returns `CSSStyleProperties` (not `CSSStyleDeclaration`)",
            "spec_url": "https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "145"
              },
              "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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          }
        }
      },
      "getDefaultComputedStyle": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/getDefaultComputedStyle",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "19"
            },
            "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
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        },
        "pseudo_element_support": {
          "__compat": {
            "description": "Pseudo-element support",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "19"
              },
              "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
            }
          }
        }
      },
      "getDigitalGoodsService": {
        "__compat": {
          "spec_url": "https://wicg.github.io/digital-goods/#getdigitalgoodsservice-method",
          "tags": [
            "web-features:digital-goods"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": {
              "version_added": "101"
            },
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "134"
            },
            "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
          }
        }
      },
      "getScreenDetails": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/getScreenDetails",
          "spec_url": "https://w3c.github.io/window-management/#api-window-getScreenDetails-method",
          "tags": [
            "web-features:window-management"
          ],
          "support": {
            "chrome": {
              "version_added": "100"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "getSelection": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/getSelection",
          "spec_url": "https://w3c.github.io/selection-api/#dom-window-getselection",
          "tags": [
            "web-features:selection-api"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "hashchange_event": {
        "__compat": {
          "description": "`hashchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/hashchange_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-hashchange",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onhashchange"
          ],
          "tags": [
            "web-features:hashchange"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "8"
              },
              {
                "version_added": "4",
                "version_removed": "8",
                "notes": "A regular `Event` object is fired, rather than a `HashChangeEvent` object."
              }
            ],
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3.6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "8"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "10.6"
            },
            "opera_android": {
              "version_added": "11"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": {
              "version_added": "5"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "history": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/history",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#the-history-interface",
          "tags": [
            "web-features:history"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "innerHeight": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/innerHeight",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-innerheight",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "From version 4 to 24, this property could give a wrong value before page load in certain circumstances (see [bug 641188](https://bugzil.la/641188))."
            },
            "firefox_android": {
              "version_added": "4",
              "notes": "Before version 24, this property could give a wrong value before page load in certain circumstances (see [bug 641188](https://bugzil.la/641188))."
            },
            "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",
              "notes": "This property returns the height of the [visual viewport](https://developer.mozilla.org/docs/Glossary/visual_viewport) instead of the layout viewport. See [bug 174362](https://webkit.org/b/174362) for details."
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "innerWidth": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/innerWidth",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-innerwidth",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "From version 4 to 24, this property could give a wrong value before page load in certain circumstances (see [bug 641188](https://bugzil.la/641188))."
            },
            "firefox_android": {
              "version_added": "4",
              "notes": "Before version 24, this property could give a wrong value before page load in certain circumstances (see [bug 641188](https://bugzil.la/641188))."
            },
            "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",
              "notes": "This property returns the width of the [visual viewport](https://developer.mozilla.org/docs/Glossary/visual_viewport) instead of the layout viewport. See [bug 174362](https://webkit.org/b/174362) for details."
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "languagechange_event": {
        "__compat": {
          "description": "`languagechange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/languagechange_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-languagechange",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onlanguagechange"
          ],
          "tags": [
            "web-features:language"
          ],
          "support": {
            "chrome": {
              "version_added": "37"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "32"
            },
            "firefox_android": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "launchQueue": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/launchQueue",
          "spec_url": "https://wicg.github.io/web-app-launch/#launchqueue-interface",
          "tags": [
            "web-features:app-launch-handler"
          ],
          "support": {
            "chrome": {
              "version_added": "102"
            },
            "chrome_android": {
              "version_added": false
            },
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "length": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/length",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-length-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "load_event": {
        "__compat": {
          "description": "`load` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/load_event",
          "spec_url": [
            "https://w3c.github.io/uievents/#event-type-load",
            "https://html.spec.whatwg.org/multipage/parsing.html#delay-the-load-event"
          ],
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.0"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "4"
            },
            "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": false
          }
        }
      },
      "localStorage": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/localStorage",
          "spec_url": "https://html.spec.whatwg.org/multipage/webstorage.html#dom-localstorage-dev",
          "tags": [
            "web-features:localstorage"
          ],
          "support": {
            "chrome": {
              "version_added": "4"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.16",
              "notes": "The key used for the Web Storage bucket is based on various factors. See [the Deno manual](https://deno.land/manual/runtime/web_storage_api)."
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3.5"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "8"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "10.5"
            },
            "opera_android": {
              "version_added": "11"
            },
            "safari": {
              "version_added": "4"
            },
            "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/Window/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",
            "deno": {
              "version_added": "1.7",
              "notes": "Reflects the value passed via the `--location` runtime flag."
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Before Firefox 57, single quotes contained in URLs were escaped when accessed via URL APIs. See [bug 1386683](https://bugzil.la/1386683)."
            },
            "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
          }
        }
      },
      "locationbar": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/locationbar",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-locationbar-dev",
          "tags": [
            "web-features:barprop"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "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
          }
        }
      },
      "matchMedia": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/matchMedia",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-matchmedia",
          "tags": [
            "web-features:matchmedia"
          ],
          "support": {
            "chrome": {
              "version_added": "9"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "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": {
              "version_added": "3"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "menubar": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/menubar",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-menubar-dev",
          "tags": [
            "web-features:barprop"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "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
          }
        }
      },
      "message_event": {
        "__compat": {
          "description": "`message` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/message_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-message",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onmessage"
          ],
          "tags": [
            "web-features:postmessage"
          ],
          "support": {
            "chrome": {
              "version_added": "60"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "9"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "8"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": "47"
            },
            "safari": {
              "version_added": "4"
            },
            "safari_ios": {
              "version_added": "4"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "messageerror_event": {
        "__compat": {
          "description": "`messageerror` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/messageerror_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-messageerror",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onmessageerror"
          ],
          "tags": [
            "web-features:messageerror"
          ],
          "support": {
            "chrome": {
              "version_added": "60"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "18"
            },
            "firefox": {
              "version_added": "57"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": "47"
            },
            "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
          }
        }
      },
      "moveBy": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/moveBy",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-moveby",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "moveTo": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/moveTo",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-moveto",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "relative-multi-screen": {
          "__compat": {
            "description": "Moved relative to the [Multi-screen origin](https://developer.mozilla.org/docs/Web/API/Window_Management_API/Multi-screen_origin)",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-moveto",
            "tags": [
              "web-features:window-management"
            ],
            "support": {
              "chrome": {
                "version_added": "100",
                "notes": "Without the `window-management` permission, multi-screen coordinates are used, but windows are clamped to their existing displays."
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "1",
                "notes": "Multi-screen coordinates are used, but windows are clamped to their existing displays."
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1",
                "partial_implementation": true,
                "notes": "Coordinate origin used is inconsistent/unreliable."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "mozInnerScreenX": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/mozInnerScreenX",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "3.6"
            },
            "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
          }
        }
      },
      "mozInnerScreenY": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/mozInnerScreenY",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "3.6"
            },
            "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
          }
        }
      },
      "name": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/name",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-name-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.38"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Before Firefox 86, if a new page from another domain is loaded into a tab, then `window.name` is not set to an empty string, which can allow some cross-site attacks. See [bug 1685089](https://bugzil.la/1685089) and [bug 444222](https://bugzil.la/444222)."
            },
            "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": false
          }
        }
      },
      "navigation": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/navigation",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-navigation",
          "tags": [
            "web-features:navigation"
          ],
          "support": {
            "chrome": {
              "version_added": "102"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "navigator": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/navigator",
          "spec_url": "https://html.spec.whatwg.org/multipage/system-state.html#dom-navigator",
          "tags": [
            "web-features:navigator"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "1"
              },
              {
                "alternative_name": "clientInformation",
                "version_added": "1"
              }
            ],
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.8"
            },
            "edge": [
              {
                "version_added": "12"
              },
              {
                "alternative_name": "clientInformation",
                "version_added": "12"
              }
            ],
            "firefox": [
              {
                "version_added": "1"
              },
              {
                "alternative_name": "clientInformation",
                "version_added": "91"
              }
            ],
            "firefox_android": "mirror",
            "ie": [
              {
                "version_added": "4"
              },
              {
                "alternative_name": "clientInformation",
                "version_added": "≤6"
              }
            ],
            "oculus": "mirror",
            "opera": [
              {
                "version_added": "3"
              },
              {
                "alternative_name": "clientInformation",
                "version_added": "15"
              }
            ],
            "opera_android": [
              {
                "version_added": "10.1"
              },
              {
                "alternative_name": "clientInformation",
                "version_added": "14"
              }
            ],
            "safari": [
              {
                "version_added": "1"
              },
              {
                "alternative_name": "clientInformation",
                "version_added": "1"
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "offline_event": {
        "__compat": {
          "description": "`offline` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/offline_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-offline",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onoffline"
          ],
          "tags": [
            "web-features:online"
          ],
          "support": {
            "chrome": {
              "version_added": "3"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "9"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "4"
            },
            "safari_ios": {
              "version_added": "3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "online_event": {
        "__compat": {
          "description": "`online` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/online_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-online",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-ononline"
          ],
          "tags": [
            "web-features:online"
          ],
          "support": {
            "chrome": {
              "version_added": "3"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "9"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "4"
            },
            "safari_ios": {
              "version_added": "3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "open": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/open",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-open-dev",
            "https://drafts.csswg.org/cssom-view/#the-features-argument-to-the-open()-method"
          ],
          "tags": [
            "web-features:window"
          ],
          "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": {
              "version_added": "1",
              "partial_implementation": true,
              "notes": "This method will not function if the `target` parameter is unspecified or set to `_blank`."
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "features_parameter_attributionsrc": {
          "__compat": {
            "description": "`features` parameter accepts `\"attributionsrc\"` value",
            "tags": [
              "web-features:attribution-reporting"
            ],
            "support": {
              "chrome": {
                "version_added": "125"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "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": false,
              "deprecated": true
            }
          }
        },
        "features_parameter_popup": {
          "__compat": {
            "description": "`features` parameter accepts `\"popup\"` value",
            "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#popup-window-is-requested",
            "tags": [
              "web-features:window"
            ],
            "support": {
              "chrome": {
                "version_added": "98"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "96"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": {
                "version_added": false
              },
              "opera_android": {
                "version_added": false
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "once_per_event": {
          "__compat": {
            "description": "One `Window.open()` call per event",
            "tags": [
              "web-features:window"
            ],
            "support": {
              "chrome": {
                "version_added": "23"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "65"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "4"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "≤12.1"
              },
              "opera_android": {
                "version_added": "≤12.1"
              },
              "safari": {
                "version_added": "11"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": false
            }
          }
        },
        "relative-multi-screen": {
          "__compat": {
            "description": "Opened relative to the [Multi-screen origin](https://developer.mozilla.org/docs/Web/API/Window_Management_API/Multi-screen_origin)",
            "spec_url": [
              "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-open-dev",
              "https://drafts.csswg.org/cssom-view/#the-features-argument-to-the-open()-method"
            ],
            "tags": [
              "web-features:window-management"
            ],
            "support": {
              "chrome": {
                "version_added": "100",
                "notes": "Without the `window-management` permission, multi-screen coordinates are used, but windows are clamped to their existing displays."
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1",
                "partial_implementation": true,
                "notes": "Coordinate origin used is inconsistent/unreliable."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "opener": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/opener",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-opener-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "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
          }
        }
      },
      "orientation": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/orientation",
          "spec_url": "https://compat.spec.whatwg.org/#dfn-window-orientation-angle",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": {
              "version_added": "18"
            },
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": {
              "version_added": "44"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": "≤14"
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": "≤3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "orientationchange_event": {
        "__compat": {
          "description": "`orientationchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/orientationchange_event",
          "spec_url": "https://compat.spec.whatwg.org/#event-orientationchange",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": {
              "version_added": "18"
            },
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": {
              "version_added": "44"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": "≤14"
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": "≤3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "originAgentCluster": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/originAgentCluster",
          "spec_url": "https://html.spec.whatwg.org/multipage/browsers.html#origin-keyed-agent-clusters",
          "support": {
            "chrome": {
              "version_added": "90"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "138"
            },
            "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
          }
        }
      },
      "outerHeight": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/outerHeight",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-outerheight",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "outerWidth": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/outerWidth",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-outerwidth",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "pagehide_event": {
        "__compat": {
          "description": "`pagehide` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/pagehide_event",
          "spec_url": "https://html.spec.whatwg.org/multipage/indices.html#event-pagehide",
          "tags": [
            "web-features:page-transition-events"
          ],
          "support": {
            "chrome": {
              "version_added": "3"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "pagereveal_event": {
        "__compat": {
          "description": "`pagereveal` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/pagereveal_event",
          "spec_url": "https://html.spec.whatwg.org/multipage/indices.html#event-pagereveal",
          "tags": [
            "web-features:view-transitions"
          ],
          "support": {
            "chrome": {
              "version_added": "123"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1860854"
            },
            "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
          }
        }
      },
      "pageshow_event": {
        "__compat": {
          "description": "`pageshow` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/pageshow_event",
          "spec_url": "https://html.spec.whatwg.org/multipage/indices.html#event-pageshow",
          "tags": [
            "web-features:page-transition-events"
          ],
          "support": {
            "chrome": {
              "version_added": "3"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "pageswap_event": {
        "__compat": {
          "description": "`pageswap` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/pageswap_event",
          "spec_url": "https://html.spec.whatwg.org/multipage/indices.html#event-pageswap",
          "tags": [
            "web-features:view-transitions"
          ],
          "support": {
            "chrome": {
              "version_added": "124"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1881438"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "18.2",
              "partial_implementation": true,
              "notes": "Cross-origin navigation does not fire `pageswap`. See [bug 306447](https://webkit.org/b/306447)."
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "parent": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/parent",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-parent-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3"
            },
            "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": false
          }
        }
      },
      "personalbar": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/personalbar",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-personalbar-dev",
          "tags": [
            "web-features:barprop"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "popstate_event": {
        "__compat": {
          "description": "`popstate` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/popstate_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-popstate",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onpopstate"
          ],
          "tags": [
            "web-features:history"
          ],
          "support": {
            "chrome": {
              "version_added": "5",
              "notes": "Before version 34, Chrome would fire a `popstate` event on page load."
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "4"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "11.5"
            },
            "opera_android": {
              "version_added": "11.5"
            },
            "safari": {
              "version_added": "5",
              "notes": "Before version 10, Safari would fire a `popstate` event on page load."
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "postMessage": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/postMessage",
          "spec_url": "https://html.spec.whatwg.org/multipage/web-messaging.html#dom-window-postmessage-options-dev",
          "tags": [
            "web-features:postmessage"
          ],
          "support": {
            "chrome": {
              "version_added": "2"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "3",
              "notes": [
                "Firefox 8 and up supports sending `File` and `FileList` objects between windows. This is only allowed if the recipient's principal is contained within the sender's principal for security reasons.",
                "Before Firefox 6, the `message` parameter must be a string. Since Firefox 6, the `message` parameter is serialized using the [structured clone algorithm](https://developer.mozilla.org/docs/Web/API/Web_Workers_API/Structured_clone_algorithm). This means you can pass a broad variety of data objects safely to the destination window without having to serialize them yourself."
              ]
            },
            "firefox_android": "mirror",
            "ie": [
              {
                "version_added": "10",
                "notes": "IE10 had an important limitation: see this [article](https://stackoverflow.com/questions/16226924/is-cross-origin-postmessage-broken-in-ie10) for details."
              },
              {
                "version_added": "8",
                "version_removed": "10",
                "partial_implementation": true,
                "notes": "Support only for `<frame>` and `<iframe>`."
              }
            ],
            "oculus": "mirror",
            "opera": {
              "version_added": "9.5"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "options_delegate_parameter": {
          "__compat": {
            "description": "`options.delegate` parameter",
            "support": {
              "chrome": {
                "version_added": "100"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "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": false,
              "deprecated": false
            }
          }
        },
        "options_includeUserActivation_parameter": {
          "__compat": {
            "description": "`options.includeUserActivation` parameter",
            "support": {
              "chrome": {
                "version_added": "72"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": false
              },
              "firefox_android": "mirror",
              "nodejs": {
                "version_added": false
              },
              "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
            }
          }
        },
        "transfer_parameter": {
          "__compat": {
            "description": "`transfer` parameter",
            "spec_url": "https://html.spec.whatwg.org/multipage/web-messaging.html#dom-structuredserializeoptions-transfer",
            "support": {
              "chrome": {
                "version_added": "4"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "20"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "11"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "≤15"
              },
              "opera_android": {
                "version_added": "≤14"
              },
              "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
            }
          }
        }
      },
      "print": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/print",
          "spec_url": "https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#printing",
          "tags": [
            "web-features:print"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": {
              "version_added": "114"
            },
            "ie": {
              "version_added": "5"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "6",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "opera_android": {
              "version_added": "10.1",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "safari": {
              "version_added": "1.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "prompt": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/prompt",
          "spec_url": "https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-prompt-dev",
          "tags": [
            "web-features:alerts"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Starting with Chrome 46, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.5"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Firefox strips newline characters from the prompt response; see [bug 1716229](https://bugzil.la/1716229)."
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4",
              "notes": "This function has no effect in the Modern UI/Metro version of Internet Explorer for Windows 8. It does not display a prompt to the user, and always returns `undefined`. It is not clear whether this is a bug or intended behavior. Desktop versions of IE do implement this function."
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "opera_android": {
              "version_added": "10.1",
              "notes": "Starting with Opera 33, this method is blocked inside an `<iframe>` unless its sandbox attribute has the value `allow-modals`."
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "pushManager": {
        "__compat": {
          "spec_url": "https://w3c.github.io/push-api/#dom-pushmanagerattribute-pushmanager",
          "support": {
            "chrome": {
              "version_added": false,
              "impl_url": "https://crbug.com/382298314"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": false
            },
            "firefox": {
              "version_added": false,
              "impl_url": "https://bugzil.la/1935325"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "18.4"
            },
            "safari_ios": {
              "version_added": "18.4",
              "notes": "Notifications are supported in web apps saved to the home screen."
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": {
              "version_added": false
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "queryLocalFonts": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/queryLocalFonts",
          "spec_url": "https://wicg.github.io/local-font-access/#dom-window-querylocalfonts",
          "tags": [
            "web-features:local-fonts"
          ],
          "support": {
            "chrome": {
              "version_added": "103"
            },
            "chrome_android": {
              "version_added": false,
              "impl_url": "https://crbug.com/40840834"
            },
            "deno": {
              "version_added": false
            },
            "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
          }
        }
      },
      "rejectionhandled_event": {
        "__compat": {
          "description": "`rejectionhandled` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/rejectionhandled_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/webappapis.html#unhandled-promise-rejections",
            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onrejectionhandled"
          ],
          "support": {
            "chrome": {
              "version_added": "49"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.40"
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "69"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "11"
            },
            "safari_ios": {
              "version_added": "11.3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "releaseEvents": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/releaseEvents",
          "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-window-releaseevents",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "11"
            },
            "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
          }
        }
      },
      "requestAnimationFrame": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/requestAnimationFrame",
          "spec_url": "https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#dom-animationframeprovider-requestanimationframe",
          "tags": [
            "web-features:request-animation-frame"
          ],
          "support": {
            "chrome": [
              {
                "version_added": "24"
              },
              {
                "prefix": "webkit",
                "version_added": "10"
              }
            ],
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12",
              "notes": "Before version 17, Edge does not reliably fire `requestAnimationFrame` before the paint cycle."
            },
            "firefox": [
              {
                "version_added": "23",
                "notes": "Callback parameter is a `DOMHighResTimestamp`. This means ten microsecond precision and zero time as `performance.now()`."
              },
              {
                "prefix": "moz",
                "version_added": "11",
                "version_removed": "42",
                "notes": "Callback parameter is a `DOMTimestamp`. This means millisecond precision and zero time as `Date.now()`."
              },
              {
                "prefix": "moz",
                "version_added": "4",
                "version_removed": "11",
                "notes": "Could be called with no input parameters."
              }
            ],
            "firefox_android": [
              {
                "version_added": "23"
              },
              {
                "prefix": "moz",
                "version_added": "14",
                "version_removed": "42"
              }
            ],
            "ie": {
              "version_added": "10",
              "notes": "Internet Explorer does not reliably fire `requestAnimationFrame` before the paint cycle."
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": [
              {
                "version_added": "7"
              },
              {
                "prefix": "webkit",
                "version_added": "6"
              }
            ],
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "requestFileSystem": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/requestFileSystem",
          "support": {
            "chrome": {
              "prefix": "webkit",
              "version_added": "13"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": {
              "version_added": false
            },
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "prefix": "webkit",
              "version_added": "6",
              "version_removed": "8"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "prefix": "webkit",
              "version_added": "37"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "requestIdleCallback": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/requestIdleCallback",
          "spec_url": "https://w3c.github.io/requestidlecallback/#the-requestidlecallback-method",
          "tags": [
            "web-features:requestidlecallback"
          ],
          "support": {
            "chrome": {
              "version_added": "47"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": "55"
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false,
              "impl_url": "https://webkit.org/b/285049"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "resize_event": {
        "__compat": {
          "description": "`resize` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/resize_event",
          "spec_url": "https://drafts.csswg.org/cssom-view/#eventdef-window-resize",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1",
              "notes": "Chrome does not fire a `resize` event on page load."
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12",
              "notes": "Before Edge 79, Edge fired a `resize` event on page load. This is no longer the case."
            },
            "firefox": {
              "version_added": "1",
              "notes": "Before Firefox 68, Firefox fired a `resize` event on page load. This is no longer the case."
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "4"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "7",
              "notes": "Opera does not fire a `resize` event on page load."
            },
            "opera_android": {
              "version_added": "10.1",
              "notes": "Opera does not fire a `resize` event on page load."
            },
            "safari": {
              "version_added": "1.1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "1",
              "notes": "WebView does not fire a `resize` event on page load."
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "resizeBy": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/resizeBy",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-resizeby",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Since Firefox 7, it's no longer possible for a web site to change the default size of a window in a browser if the window wasn't created by `window.open` or contains more than one tab. [See here](https://bugzil.la/565541#c24) for more details."
            },
            "firefox_android": {
              "version_added": "4"
            },
            "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": false
          }
        }
      },
      "resizeTo": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/resizeTo",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-resizeto",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Since Firefox 7, it's no longer possible for a web site to change the default size of a window in a browser if the window wasn't created by `window.open` or contains more than one tab. [See here](https://bugzil.la/565541#c24) for more details."
            },
            "firefox_android": {
              "version_added": "4"
            },
            "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": false
          }
        }
      },
      "resolveLocalFileSystemURL": {
        "__compat": {
          "support": {
            "chrome": {
              "prefix": "webkit",
              "version_added": "13"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": {
              "version_added": false
            },
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": false,
            "deprecated": false
          }
        }
      },
      "screen": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/screen",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screen",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "screenLeft": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/screenLeft",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screenleft",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "64"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5"
            },
            "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
          }
        },
        "relative-multi-screen": {
          "__compat": {
            "description": "Relative to the [Multi-screen origin](https://developer.mozilla.org/docs/Web/API/Window_Management_API/Multi-screen_origin)",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screenleft",
            "tags": [
              "web-features:window-management"
            ],
            "support": {
              "chrome": {
                "version_added": "100"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "64"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1",
                "partial_implementation": true,
                "notes": "Coordinate origin used is inconsistent/unreliable."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "screenTop": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/screenTop",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screentop",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "64"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "5"
            },
            "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
          }
        },
        "relative-multi-screen": {
          "__compat": {
            "description": "Relative to the [Multi-screen origin](https://developer.mozilla.org/docs/Web/API/Window_Management_API/Multi-screen_origin)",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screentop",
            "tags": [
              "web-features:window-management"
            ],
            "support": {
              "chrome": {
                "version_added": "100"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "64"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1",
                "partial_implementation": true,
                "notes": "Coordinate origin used is inconsistent/unreliable."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "screenX": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/screenX",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screenx",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Before Firefox 28, Gecko was using device pixels instead of CSS pixels; in other words, it was assuming a value of `screenPixelsPerCSSPixel` of 1 for any device."
            },
            "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
          }
        },
        "relative-multi-screen": {
          "__compat": {
            "description": "Relative to the [Multi-screen origin](https://developer.mozilla.org/docs/Web/API/Window_Management_API/Multi-screen_origin)",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screenx",
            "tags": [
              "web-features:window-management"
            ],
            "support": {
              "chrome": {
                "version_added": "100"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1",
                "partial_implementation": true,
                "notes": "Coordinate origin used is inconsistent/unreliable."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "screenY": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/screenY",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screeny",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Before Firefox 28, Gecko was using device pixels instead of CSS pixels; in other words, it was assuming a value of `screenPixelsPerCSSPixel` of 1 for any device."
            },
            "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
          }
        },
        "relative-multi-screen": {
          "__compat": {
            "description": "Relative to the [Multi-screen origin](https://developer.mozilla.org/docs/Web/API/Window_Management_API/Multi-screen_origin)",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-screeny",
            "tags": [
              "web-features:window-management"
            ],
            "support": {
              "chrome": {
                "version_added": "100"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "64"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1",
                "partial_implementation": true,
                "notes": "Coordinate origin used is inconsistent/unreliable."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "scroll": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/scroll",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-scroll",
          "tags": [
            "web-features:scroll-elements"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "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
          }
        },
        "options_behavior_parameter": {
          "__compat": {
            "description": "`options.behavior` parameter",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-scrolloptions-behavior",
            "tags": [
              "web-features:scroll-elements"
            ],
            "support": {
              "chrome": {
                "version_added": "61"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "36"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "14",
                "notes": "Safari does not have support for the `smooth` scroll behavior."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "options_left_parameter": {
          "__compat": {
            "description": "`options.left` parameter",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-scrolltooptions-left",
            "tags": [
              "web-features:scroll-elements"
            ],
            "support": {
              "chrome": {
                "version_added": "41"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": "36"
              },
              "firefox_android": "mirror",
              "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": false
            }
          }
        },
        "options_top_parameter": {
          "__compat": {
            "description": "`options.top` parameter",
            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-scrolltooptions-top",
            "tags": [
              "web-features:scroll-elements"
            ],
            "support": {
              "chrome": {
                "version_added": "41"
              },
              "chrome_android": "mirror",
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          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-scrollbars-dev",
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            "safari_ios": {
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          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-scrollby",
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          }
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              "chrome_android": "mirror",
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              "edge": "mirror",
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            "edge": "mirror",
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/scrollsnapchange_event",
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            "edge": "mirror",
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              "version_added": false
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            "edge": "mirror",
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            "firefox_android": "mirror",
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          "status": {
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            "chrome_android": "mirror",
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              "version_added": false
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            "edge": {
              "version_added": "12"
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            "firefox": {
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              "version_added": "4"
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            "standard_track": true,
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                "version_added": "61"
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              "edge": "mirror",
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            "status": {
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          }
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              "web-features:scroll-elements"
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            "support": {
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              "chrome_android": "mirror",
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              "edge": "mirror",
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            "status": {
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              "standard_track": true,
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          }
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          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-scrollx",
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            "edge": [
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            "standard_track": true,
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            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-scrollx",
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              "chrome_android": "mirror",
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              "edge": {
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              "standard_track": true,
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              {
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        },
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            "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-scrolly",
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            "support": {
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              "chrome_android": "mirror",
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              "edge": {
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              },
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            },
            "status": {
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              "standard_track": true,
              "deprecated": false
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          }
        }
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      "self": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/self",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-self-dev",
          "tags": [
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          "support": {
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            "chrome_android": "mirror",
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            "standard_track": true,
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          "spec_url": "https://webaudio.github.io/web-speech-api/#tts-section",
          "tags": [
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            "chrome_android": "mirror",
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/storage_event",
          "spec_url": [
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            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onstorage"
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          "tags": [
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            "chrome_android": "mirror",
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            "standard_track": true,
            "deprecated": false
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              "version_added": "6"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
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            "firefox": {
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            "opera": "mirror",
            "opera_android": "mirror",
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            "samsunginternet_android": "mirror",
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            "standard_track": false,
            "deprecated": true
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        }
      },
      "toolbar": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/toolbar",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-toolbar-dev",
          "tags": [
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          "support": {
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            "chrome_android": "mirror",
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              "version_added": false
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            "firefox": {
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            "opera_android": "mirror",
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            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
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          "status": {
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            "standard_track": true,
            "deprecated": false
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        }
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          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-top-dev",
          "tags": [
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          ],
          "support": {
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            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
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            },
            "firefox": {
              "version_added": "1",
              "notes": "Starting in Firefox 6, this property is read only, as defined by the standard."
            },
            "firefox_android": {
              "version_added": "4"
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            "ie": {
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            "oculus": "mirror",
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            "opera_android": {
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          "status": {
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            "standard_track": true,
            "deprecated": false
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          "description": "`unhandledrejection` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/unhandledrejection_event",
          "spec_url": [
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            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onunhandledrejection"
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            "chrome_android": "mirror",
            "deno": {
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            "edge": "mirror",
            "firefox": {
              "version_added": "69",
              "notes": "`event.preventDefault()` does not prevent Firefox from logging the error message in the console, see [bug 1642147](https://bugzil.la/1642147)."
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            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/unload_event",
          "spec_url": [
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            "https://html.spec.whatwg.org/multipage/webappapis.html#handler-window-onunload"
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          "support": {
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            "chrome_android": "mirror",
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            "samsunginternet_android": "mirror",
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      },
      "updateCommands": {
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            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
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            "edge": "mirror",
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          "status": {
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            "standard_track": false,
            "deprecated": false
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        }
      },
      "viewport": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/viewport",
          "spec_url": "https://drafts.csswg.org/css-viewport/#dom-window-viewport",
          "tags": [
            "web-features:viewport-segments"
          ],
          "support": {
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            },
            "chrome_android": "mirror",
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            "firefox": {
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          "status": {
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            "standard_track": true,
            "deprecated": false
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        }
      },
      "visualViewport": {
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/visualViewport",
          "spec_url": "https://drafts.csswg.org/cssom-view/#dom-window-visualviewport",
          "tags": [
            "web-features:visual-viewport"
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            "chrome_android": "mirror",
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            "firefox_android": {
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            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "vrdisplayactivate_event": {
        "__compat": {
          "description": "`vrdisplayactivate` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/vrdisplayactivate_event",
          "tags": [
            "web-features:webvr"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "15",
              "version_removed": "79"
            },
            "firefox": [
              {
                "version_added": "98",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.vr.enabled",
                    "value_to_set": "true"
                  }
                ]
              },
              {
                "version_added": "64",
                "version_removed": "98",
                "notes": "Only on macOS and Windows."
              },
              {
                "version_added": "55",
                "version_removed": "64",
                "notes": "Only on Windows."
              }
            ],
            "firefox_android": {
              "version_added": "55",
              "version_removed": "98"
            },
            "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
          }
        }
      },
      "vrdisplayconnect_event": {
        "__compat": {
          "description": "`vrdisplayconnect` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/vrdisplayconnect_event",
          "tags": [
            "web-features:webvr"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "15",
              "version_removed": "79"
            },
            "firefox": [
              {
                "version_added": "98",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.vr.enabled",
                    "value_to_set": "true"
                  }
                ]
              },
              {
                "version_added": "64",
                "version_removed": "98",
                "notes": "Only on macOS and Windows."
              },
              {
                "version_added": "55",
                "version_removed": "64",
                "notes": "Only on Windows."
              }
            ],
            "firefox_android": {
              "version_added": "55",
              "version_removed": "98"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": {
              "version_added": "6.0",
              "version_removed": "13.0",
              "notes": "Supported on Samsung Internet for GearVR."
            },
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "vrdisplaydeactivate_event": {
        "__compat": {
          "description": "`vrdisplaydeactivate` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/vrdisplaydeactivate_event",
          "tags": [
            "web-features:webvr"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "15",
              "version_removed": "79"
            },
            "firefox": [
              {
                "version_added": "98",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.vr.enabled",
                    "value_to_set": "true"
                  }
                ]
              },
              {
                "version_added": "64",
                "version_removed": "98",
                "notes": "Only on macOS and Windows."
              },
              {
                "version_added": "55",
                "version_removed": "64",
                "notes": "Only on Windows."
              }
            ],
            "firefox_android": {
              "version_added": "55",
              "version_removed": "98"
            },
            "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
          }
        }
      },
      "vrdisplaydisconnect_event": {
        "__compat": {
          "description": "`vrdisplaydisconnect` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/vrdisplaydisconnect_event",
          "tags": [
            "web-features:webvr"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": {
              "version_added": "56",
              "version_removed": "80",
              "notes": [
                "Chrome for Android 56 supports only Google Daydream View.",
                "Chrome for Android 57 adds support for Google Cardboard."
              ]
            },
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "15",
              "version_removed": "79"
            },
            "firefox": [
              {
                "version_added": "98",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.vr.enabled",
                    "value_to_set": "true"
                  }
                ]
              },
              {
                "version_added": "64",
                "version_removed": "98",
                "notes": "Only on macOS and Windows."
              },
              {
                "version_added": "55",
                "version_removed": "64",
                "notes": "Only on Windows."
              }
            ],
            "firefox_android": {
              "version_added": "55",
              "version_removed": "98"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": {
              "version_added": "6.0",
              "version_removed": "13.0",
              "notes": "Supported on Samsung Internet for GearVR."
            },
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "vrdisplaypresentchange_event": {
        "__compat": {
          "description": "`vrdisplaypresentchange` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/vrdisplaypresentchange_event",
          "tags": [
            "web-features:webvr"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": {
              "version_added": "56",
              "version_removed": "80",
              "notes": [
                "Chrome for Android 56 supports only Google Daydream View.",
                "Chrome for Android 57 adds support for Google Cardboard."
              ]
            },
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "15",
              "version_removed": "79"
            },
            "firefox": [
              {
                "version_added": "98",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.vr.enabled",
                    "value_to_set": "true"
                  }
                ]
              },
              {
                "version_added": "64",
                "version_removed": "98",
                "notes": "Only on macOS and Windows."
              },
              {
                "version_added": "55",
                "version_removed": "64",
                "notes": "Only on Windows."
              }
            ],
            "firefox_android": {
              "version_added": "55",
              "version_removed": "98"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": {
              "version_added": "6.0",
              "version_removed": "13.0",
              "notes": "Supported on Samsung Internet for GearVR."
            },
            "webview_android": {
              "version_added": false
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "webkitConvertPointFromNodeToPage": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/webkitConvertPointFromNodeToPage",
          "support": {
            "chrome": {
              "version_added": "1",
              "version_removed": "39"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12",
              "version_removed": "79"
            },
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "4"
            },
            "safari_ios": {
              "version_added": "3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "webkitConvertPointFromPageToNode": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/webkitConvertPointFromPageToNode",
          "support": {
            "chrome": {
              "version_added": "1",
              "version_removed": "39"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": false
            },
            "edge": {
              "version_added": "12",
              "version_removed": "79"
            },
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "4"
            },
            "safari_ios": {
              "version_added": "3"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "window": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Window/window",
          "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-window-dev",
          "tags": [
            "web-features:window"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.0",
              "version_removed": "2.0"
            },
            "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": "3"
            },
            "safari_ios": {
              "version_added": "1"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}