{
  "api": {
    "CSSStyleSheet": {
      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet",
        "spec_url": "https://drafts.csswg.org/cssom/#the-cssstylesheet-interface",
        "tags": [
          "web-features:css-object-model"
        ],
        "support": {
          "chrome": {
            "version_added": "1"
          },
          "chrome_android": "mirror",
          "edge": {
            "version_added": "12"
          },
          "firefox": {
            "version_added": "1"
          },
          "firefox_android": "mirror",
          "ie": {
            "version_added": "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
        }
      },
      "CSSStyleSheet": {
        "__compat": {
          "description": "`CSSStyleSheet()` constructor",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/CSSStyleSheet",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-cssstylesheet",
          "tags": [
            "web-features:constructed-stylesheets"
          ],
          "support": {
            "chrome": {
              "version_added": "73"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "101"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": false
            },
            "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
          }
        },
        "options_baseURL_parameter": {
          "__compat": {
            "description": "`options.baseURL` parameter",
            "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheetinit-baseurl",
            "tags": [
              "web-features:constructed-stylesheets"
            ],
            "support": {
              "chrome": {
                "version_added": false,
                "impl_url": "https://crbug.com/40207149"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "101"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": false
              },
              "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
            }
          }
        }
      },
      "addRule": {
        "__compat": {
          "description": "`addRule()`",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/addRule",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-addrule",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "68"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "cssRules": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/cssRules",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-cssrules",
          "tags": [
            "web-features:css-object-model"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "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
          }
        }
      },
      "deleteRule": {
        "__compat": {
          "description": "`deleteRule()`",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/deleteRule",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-deleterule",
          "tags": [
            "web-features:css-object-model"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "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
          }
        }
      },
      "insertRule": {
        "__compat": {
          "description": "`insertRule()`",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/insertRule",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-insertrule",
          "tags": [
            "web-features:css-object-model"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "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
          }
        },
        "index_parameter_optional": {
          "__compat": {
            "description": "`index` parameter is optional",
            "tags": [
              "web-features:css-object-model"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "55"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": false
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "ownerRule": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/ownerRule",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-ownerrule",
          "tags": [
            "web-features:css-object-model"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "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
          }
        }
      },
      "removeRule": {
        "__compat": {
          "description": "`removeRule()`",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/removeRule",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-removerule",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "68"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "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": true
          }
        }
      },
      "replace": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/replace",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-replace",
          "tags": [
            "web-features:constructed-stylesheets"
          ],
          "support": {
            "chrome": {
              "version_added": "73"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "101"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": false
            },
            "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
          }
        }
      },
      "replaceSync": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/replaceSync",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-replacesync",
          "tags": [
            "web-features:constructed-stylesheets"
          ],
          "support": {
            "chrome": {
              "version_added": "73"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "101"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": false
            },
            "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
          }
        }
      },
      "rules": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/CSSStyleSheet/rules",
          "spec_url": "https://drafts.csswg.org/cssom/#dom-cssstylesheet-rules",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "68"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "9"
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      }
    }
  }
}