{
  "css": {
    "selectors": {
      "is": {
        "__compat": {
          "description": "<code>:is()</code>",
          "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:is",
          "support": {
            "chrome": [
              {
                "version_added": "68",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "66",
                "version_removed": "71",
                "alternative_name": ":matches()",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "12",
                "alternative_name": ":-webkit-any()",
                "notes": "Doesn't support combinators."
              }
            ],
            "chrome_android": [
              {
                "version_added": "66",
                "version_removed": "71",
                "alternative_name": ":matches()",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "18",
                "alternative_name": ":-webkit-any()",
                "notes": "Doesn't support combinators."
              }
            ],
            "edge": [
              {
                "version_added": "79",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "79",
                "alternative_name": ":-webkit-any()",
                "notes": "Doesn't support combinators."
              }
            ],
            "firefox": [
              {
                "version_added": "78"
              },
              {
                "version_added": "77",
                "flags": [
                  {
                    "type": "preference",
                    "name": "layout.css.is-where-selectors.enabled",
                    "value_to_set": "enabled"
                  }
                ],
                "notes": "Enabled by default in Firefox Nightly."
              },
              {
                "version_added": "4",
                "alternative_name": ":-moz-any()",
                "notes": [
                  "Doesn't support combinators.",
                  "See <a href='https://bugzil.la/906353'>bug 906353</a>"
                ]
              }
            ],
            "firefox_android": {
              "version_added": "4",
              "alternative_name": ":-moz-any()",
              "notes": [
                "Doesn't support combinators.",
                "See <a href='https://bugzil.la/906353'>bug 906353</a>"
              ]
            },
            "ie": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "53",
                "version_removed": "58",
                "alternative_name": ":matches()",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "15",
                "alternative_name": ":-webkit-any()",
                "notes": "Doesn't support combinators."
              }
            ],
            "opera_android": [
              {
                "version_added": "48",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "47",
                "version_removed": "50",
                "alternative_name": ":matches()",
                "flags": [
                  {
                    "type": "preference",
                    "name": "#enable-experimental-web-platform-features",
                    "value_to_set": "Enabled"
                  }
                ],
                "notes": "Combinators in the selector list argument may not match correctly (see <a href='https://crbug.com/842157'>bug 842157</a>)."
              },
              {
                "version_added": "14",
                "alternative_name": ":-webkit-any()",
                "notes": "Doesn't support combinators."
              }
            ],
            "safari": [
              {
                "version_added": "14"
              },
              {
                "version_added": "9",
                "alternative_name": ":matches()"
              },
              {
                "version_added": "5",
                "alternative_name": ":-webkit-any()",
                "notes": "Doesn't support combinators."
              }
            ],
            "safari_ios": [
              {
                "version_added": "14"
              },
              {
                "version_added": "9",
                "alternative_name": ":matches()"
              },
              {
                "version_added": "5",
                "alternative_name": ":-webkit-any()",
                "notes": "Doesn't support combinators."
              }
            ],
            "samsunginternet_android": [
              {
                "alternative_name": ":matches()",
                "version_added": "9.0",
                "version_removed": "10.0"
              },
              {
                "alternative_name": ":-webkit-any()",
                "version_added": "1.0"
              }
            ],
            "webview_android": {
              "version_added": "≤37",
              "alternative_name": ":-webkit-any()",
              "notes": "Doesn't support combinators."
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "forgiving_selector_list": {
          "__compat": {
            "description": "Support for forgiving selector list",
            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/:where",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": "82"
              },
              "firefox_android": {
                "version_added": "82"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              },
              "opera_android": {
                "version_added": false
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": false
              },
              "webview_android": {
                "version_added": false
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}