{
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          "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#the-script-element",
          "tags": [
            "web-features:script"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1",
              "notes": "Starting in Firefox 4, inserting &lt;script&gt; elements that have been created by calling `document.createElement(\"script\")` no longer enforces execution in insertion order. This change lets Firefox properly abide by the specification. To make script-inserted external scripts execute in their insertion order, set `.async=false` on them."
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            "firefox_android": {
              "version_added": "4"
            },
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              "version_added": "≤11"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤12.1"
            },
            "opera_android": {
              "version_added": "≤12.1"
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "async": {
          "__compat": {
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-async",
            "tags": [
              "web-features:script"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "3.6"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "≤11"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "≤4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "attributionsrc": {
          "__compat": {
            "spec_url": "https://wicg.github.io/attribution-reporting-api/#element-attrdef-script-attributionsrc",
            "tags": [
              "web-features:attribution-reporting"
            ],
            "support": {
              "chrome": {
                "version_added": "125"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": false
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "blocking": {
          "__compat": {
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-blocking",
            "tags": [
              "web-features:blocking-render"
            ],
            "support": {
              "chrome": {
                "version_added": "105"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": false,
                "impl_url": "https://bugzil.la/1751383"
              },
              "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
            }
          }
        },
        "crossorigin": {
          "__compat": {
            "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/crossorigin",
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-crossorigin",
            "tags": [
              "web-features:script"
            ],
            "support": {
              "chrome": {
                "version_added": "19"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "14"
              },
              "firefox": {
                "version_added": "14"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": {
                "version_added": "12"
              },
              "opera_android": {
                "version_added": "12"
              },
              "safari": {
                "version_added": "6",
                "notes": "The `crossorigin` attribute was implemented in WebKit in WebKit [bug 81438](https://webkit.org/b/81438)."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "defer": {
          "__compat": {
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-defer",
            "tags": [
              "web-features:script"
            ],
            "support": {
              "chrome": {
                "version_added": "1",
                "notes": "Chrome does not defer scripts with the `defer` attribute when the page is served as XHTML (`application/xhtml+xml`), see [bug 41253514](https://crbug.com/41253514) and [bug 41408348](https://crbug.com/41408348)"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "3.5",
                "notes": "Since Firefox 3.6, the `defer` attribute is ignored on scripts that don't have the `src` attribute. However, in Firefox 3.5 even inline scripts are deferred if the `defer` attribute is set."
              },
              "firefox_android": {
                "version_added": "4"
              },
              "ie": {
                "version_added": "10",
                "notes": "Before version 10, Internet Explorer implemented `defer` by a proprietary specification. Since version 10 it conforms to the W3C specification."
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "3"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "fetchpriority": {
          "__compat": {
            "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/fetchpriority",
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-fetchpriority",
            "tags": [
              "web-features:fetch-priority"
            ],
            "support": {
              "chrome": {
                "version_added": "101"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "132",
                "impl_url": "https://bugzil.la/1797715"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "17.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "integrity": {
          "__compat": {
            "spec_url": [
              "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-integrity",
              "https://w3c.github.io/webappsec-subresource-integrity/#the-integrity-attribute"
            ],
            "tags": [
              "web-features:script"
            ],
            "support": {
              "chrome": {
                "version_added": "45"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "17"
              },
              "firefox": {
                "version_added": "43"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "11.1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "ed25519_public_key": {
            "__compat": {
              "description": "Signature-based integrity (Ed25519 public key values)",
              "spec_url": "https://wicg.github.io/signature-based-sri/#monkey-patch-csp",
              "tags": [
                "web-features:signature-based-resource-integrity"
              ],
              "support": {
                "chrome": {
                  "version_added": "141"
                },
                "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
              }
            }
          }
        },
        "nomodule": {
          "__compat": {
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-nomodule",
            "tags": [
              "web-features:js-modules"
            ],
            "support": {
              "chrome": {
                "version_added": "61"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "16"
              },
              "firefox": {
                "version_added": "60"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "11"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "referrerpolicy": {
          "__compat": {
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-referrerpolicy",
            "tags": [
              "web-features:referrer-policy"
            ],
            "support": {
              "chrome": {
                "version_added": "70"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "65"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "14"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "no-referrer-when-downgrade": {
            "__compat": {
              "tags": [
                "web-features:referrer-policy"
              ],
              "support": {
                "chrome": {
                  "version_added": "70"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "65",
                  "version_removed": "92"
                },
                "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
              }
            }
          },
          "origin-when-cross-origin": {
            "__compat": {
              "tags": [
                "web-features:referrer-policy"
              ],
              "support": {
                "chrome": {
                  "version_added": "70"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "65",
                  "version_removed": "92"
                },
                "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
              }
            }
          },
          "unsafe-url": {
            "__compat": {
              "tags": [
                "web-features:referrer-policy"
              ],
              "support": {
                "chrome": {
                  "version_added": "70"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "65",
                  "version_removed": "92"
                },
                "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
              }
            }
          }
        },
        "src": {
          "__compat": {
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-src",
            "tags": [
              "web-features:script"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "≤11"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "≤4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "type": {
          "__compat": {
            "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type",
            "spec_url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-type",
            "tags": [
              "web-features:script"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "≤11"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "≤4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "importmap": {
            "__compat": {
              "description": "`type=\"importmap\"`",
              "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/importmap",
              "spec_url": "https://html.spec.whatwg.org/multipage/webappapis.html#import-map",
              "tags": [
                "web-features:import-maps"
              ],
              "support": {
                "chrome": {
                  "version_added": "89"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                  "version_added": "108"
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "16.4"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            },
            "integrity": {
              "__compat": {
                "spec_url": "https://html.spec.whatwg.org/multipage/webappapis.html#normalizing-a-module-integrity-map",
                "support": {
                  "chrome": {
                    "version_added": "127"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": "138"
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "18"
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": false,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "multiple_import_maps": {
              "__compat": {
                "description": "Multiple import maps",
                "spec_url": "https://html.spec.whatwg.org/multipage/webappapis.html#:~:text=multiple%20import%20maps",
                "support": {
                  "chrome": {
                    "version_added": "133"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false,
                    "impl_url": "https://bugzil.la/1916277"
                  },
                  "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
                }
              }
            }
          },
          "module": {
            "__compat": {
              "description": "`type=\"module\"`",
              "tags": [
                "web-features:js-modules"
              ],
              "support": {
                "chrome": {
                  "version_added": "61",
                  "notes": "Module scripts without the `async` attribute do not load when the page is served as XHTML (`application/xhtml+xml`). See [bug 40518469](https://crbug.com/40518469)."
                },
                "chrome_android": "mirror",
                "edge": [
                  {
                    "version_added": "79",
                    "notes": "Module scripts without the `async` attribute do not load when the page is served as XHTML (`application/xhtml+xml`). See [bug 40518469](https://crbug.com/40518469)."
                  },
                  {
                    "version_added": "16",
                    "version_removed": "79"
                  }
                ],
                "firefox": {
                  "version_added": "60"
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "10.1",
                  "notes": "Module scripts do not load when the page is served as XHTML (`application/xhtml+xml`)."
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "speculationrules": {
            "__compat": {
              "description": "`type=\"speculationrules\"`",
              "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules",
              "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#speculative-loading",
              "tags": [
                "web-features:speculation-rules"
              ],
              "support": {
                "chrome": [
                  {
                    "version_added": "109"
                  },
                  {
                    "version_added": "105",
                    "version_removed": "109",
                    "partial_implementation": true,
                    "notes": "Initial support included same-origin prerendering only."
                  }
                ],
                "chrome_android": [
                  {
                    "version_added": "109"
                  },
                  {
                    "version_added": "103",
                    "version_removed": "109",
                    "partial_implementation": true,
                    "notes": "Initial support included same-origin prerendering only."
                  }
                ],
                "edge": "mirror",
                "firefox": {
                  "version_added": false
                },
                "firefox_android": "mirror",
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                  "version_added": "26.2",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "SpeculationRules prefetch"
                    }
                  ]
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "webview_ios": "mirror"
              },
              "status": {
                "experimental": true,
                "standard_track": true,
                "deprecated": false
              }
            },
            "eagerness": {
              "__compat": {
                "description": "`eagerness` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#eagerness",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#speculation-rule-eagerness",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "121"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ],
                    "partial_implementation": true,
                    "notes": "Only `conservative` is supported for document rules (though `moderate` automatically falls back to `conservative`). Only `eager` and `immediate` is supported for list rules."
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "expects_no_vary_search": {
              "__compat": {
                "description": "`expects_no_vary_search` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#expects_no_vary_search",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#valid-speculation-rule:~:text=%22expects_no_vary_search%22%20key",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": [
                    {
                      "version_added": "127"
                    },
                    {
                      "version_added": "121",
                      "version_removed": "127",
                      "partial_implementation": true,
                      "notes": "Supported for `prefetch` only."
                    }
                  ],
                  "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
                }
              }
            },
            "prefetch": {
              "__compat": {
                "description": "`prefetch` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#prefetch",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#speculation-rule-set-authoring-requirements:~:text=keys%20%22tag%22%2C-,%22prefetch%22,-and%20%22prerender",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "110"
                  },
                  "chrome_android": {
                    "version_added": "103"
                  },
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false,
                    "impl_url": "https://bugzil.la/1969396"
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ],
                    "impl_url": "https://webkit.org/b/295193"
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "prerender": {
              "__compat": {
                "description": "`prerender` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#prerender",
                "spec_url": "https://wicg.github.io/nav-speculation/prerendering.html#speculation-rules",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "105"
                  },
                  "chrome_android": {
                    "version_added": "103"
                  },
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false,
                    "impl_url": "https://bugzil.la/1969838"
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": false
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": {
                    "version_added": "135",
                    "partial_implementation": true,
                    "notes": "Can be enabled via a Java API rather than a Web API. See https://goo.gle/android-prerender"
                  },
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "referrer_policy": {
              "__compat": {
                "description": "`referrer_policy` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#referrer_policy",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#valid-speculation-rule:~:text=%22referrer_policy%22%20key",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "111"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ]
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "relative_to": {
              "__compat": {
                "description": "`relative_to` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#relative_to_2",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#valid-speculation-rule:~:text=%20to%20the%20%22relative_to%22%20key",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "121"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ]
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "requires": {
              "__compat": {
                "description": "`requires` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#requires",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#speculation-rule-requirement",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "110"
                  },
                  "chrome_android": {
                    "version_added": "103"
                  },
                  "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
                }
              },
              "anonymous-client-ip-when-cross-origin": {
                "__compat": {
                  "description": "`anonymous-client-ip-when-cross-origin` value",
                  "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#anonymous-client-ip-when-cross-origin",
                  "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#speculation-rule-requirement",
                  "tags": [
                    "web-features:speculation-rules"
                  ],
                  "support": {
                    "chrome": {
                      "version_added": "110"
                    },
                    "chrome_android": {
                      "version_added": "103"
                    },
                    "edge": {
                      "version_added": false
                    },
                    "firefox": {
                      "version_added": false
                    },
                    "firefox_android": "mirror",
                    "oculus": {
                      "version_added": false
                    },
                    "opera": {
                      "version_added": false
                    },
                    "opera_android": "mirror",
                    "safari": {
                      "version_added": false
                    },
                    "safari_ios": "mirror",
                    "samsunginternet_android": {
                      "version_added": false
                    },
                    "webview_android": "mirror",
                    "webview_ios": "mirror"
                  },
                  "status": {
                    "experimental": true,
                    "standard_track": true,
                    "deprecated": false
                  }
                }
              }
            },
            "source_optional": {
              "__compat": {
                "description": "`source` key is optional",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#source",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#valid-speculation-rule:~:text=%22source%22%20key",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "122"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ]
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "tag": {
              "__compat": {
                "description": "`tag` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#tag",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#speculation-rule-tag",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "136"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ]
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "target_hint": {
              "__compat": {
                "description": "`target_hint` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#target_hint",
                "spec_url": "https://wicg.github.io/nav-speculation/prerendering.html#:~:text=Let-,targetHint,-be%20null.",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "138",
                    "partial_implementation": true,
                    "notes": "Only `&quot;_blank&quot;` and `&quot;_self&quot;` are supported and only for prefetch."
                  },
                  "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
                }
              }
            },
            "urls": {
              "__compat": {
                "description": "`urls` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#urls",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#valid-speculation-rule:~:text=%22urls%22%20key",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "109"
                  },
                  "chrome_android": {
                    "version_added": "103"
                  },
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ]
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            },
            "where": {
              "__compat": {
                "description": "`where` key",
                "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/script/type/speculationrules#where",
                "spec_url": "https://html.spec.whatwg.org/multipage/speculative-loading.html#valid-document-rule-predicate",
                "tags": [
                  "web-features:speculation-rules"
                ],
                "support": {
                  "chrome": {
                    "version_added": "121"
                  },
                  "chrome_android": "mirror",
                  "edge": "mirror",
                  "firefox": {
                    "version_added": false
                  },
                  "firefox_android": "mirror",
                  "oculus": "mirror",
                  "opera": "mirror",
                  "opera_android": "mirror",
                  "safari": {
                    "version_added": "26.2",
                    "flags": [
                      {
                        "type": "preference",
                        "name": "SpeculationRules prefetch"
                      }
                    ]
                  },
                  "safari_ios": "mirror",
                  "samsunginternet_android": "mirror",
                  "webview_android": "mirror",
                  "webview_ios": "mirror"
                },
                "status": {
                  "experimental": true,
                  "standard_track": true,
                  "deprecated": false
                }
              }
            }
          }
        }
      }
    }
  }
}