{
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            "web-features:anchor-positioning"
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              {
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              {
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                "version_added": "129"
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              "chrome_android": "mirror",
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              "standard_track": true,
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            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-block-start",
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              "chrome_android": "mirror",
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              "standard_track": true,
              "deprecated": false
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            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-bottom",
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              "chrome": {
                "version_added": "129"
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              "chrome_android": "mirror",
              "edge": "mirror",
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                "version_added": "147"
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            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
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        "center": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-center",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
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              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
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            "status": {
              "experimental": false,
              "standard_track": true,
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          }
        },
        "end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
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                "version_added": "147"
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              "oculus": "mirror",
              "opera": "mirror",
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              "safari_ios": "mirror",
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            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
        },
        "flip-block": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-try-fallbacks-flip-block",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": {
                "version_added": "128"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
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                "version_added": "147"
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              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "26"
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              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "flip-inline": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-try-fallbacks-flip-inline",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": {
                "version_added": "128"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "26"
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              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
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              "webview_ios": "mirror"
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            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
        },
        "flip-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-try-fallbacks-flip-start",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": {
                "version_added": "128"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
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              "samsunginternet_android": "mirror",
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              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "flip-x": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-try-fallbacks-flip-x",
            "support": {
              "chrome": {
                "version_added": "144"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "26.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "flip-y": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-try-fallbacks-flip-y",
            "support": {
              "chrome": {
                "version_added": "144"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "26.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "inline-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-inline-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "inline-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-inline-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "left": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-left",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "none": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-try-fallbacks-none",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": {
                "version_added": "128"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "position-area": {
          "__compat": {
            "description": "`position-area` values",
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-try-fallbacks-position-area",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "128"
                },
                {
                  "version_added": "125",
                  "version_removed": "128",
                  "notes": "`inset-area` values had to be wrapped inside an `inset-area()` function."
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "right": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-right",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "self-block-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-block-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "self-block-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-block-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "self-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "self-inline-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-inline-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "self-inline-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-inline-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "self-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "self-x-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-x-end",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "144"
                },
                {
                  "version_added": "143",
                  "version_removed": "144",
                  "partial_implementation": true,
                  "notes": "When `self-x-end` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                },
                {
                  "alternative_name": "x-self-end",
                  "version_added": "129",
                  "version_removed": "143",
                  "partial_implementation": true,
                  "notes": "When `x-self-end` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": [
                {
                  "version_added": "148"
                },
                {
                  "version_added": "147",
                  "version_removed": "148",
                  "partial_implementation": true,
                  "notes": "When `self-x-end` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 2008537](https://bugzil.la/2008537)."
                }
              ],
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "alternative_name": "x-self-end",
                  "version_added": "26"
                }
              ],
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "self-x-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-x-start",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "144"
                },
                {
                  "version_added": "143",
                  "version_removed": "144",
                  "partial_implementation": true,
                  "notes": "When `self-x-start` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                },
                {
                  "alternative_name": "x-self-start",
                  "version_added": "129",
                  "version_removed": "143",
                  "partial_implementation": true,
                  "notes": "When `x-self-start` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": [
                {
                  "version_added": "148"
                },
                {
                  "version_added": "147",
                  "version_removed": "148",
                  "partial_implementation": true,
                  "notes": "When `self-x-start` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 2008537](https://bugzil.la/2008537)."
                }
              ],
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "alternative_name": "x-self-start",
                  "version_added": "26"
                }
              ],
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "self-y-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-y-end",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "144"
                },
                {
                  "version_added": "143",
                  "version_removed": "144",
                  "partial_implementation": true,
                  "notes": "When `self-y-end` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                },
                {
                  "alternative_name": "y-self-end",
                  "version_added": "129",
                  "version_removed": "143",
                  "partial_implementation": true,
                  "notes": "When `y-self-end` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": [
                {
                  "version_added": "148"
                },
                {
                  "version_added": "147",
                  "version_removed": "148",
                  "partial_implementation": true,
                  "notes": "When `self-y-end` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 2008537](https://bugzil.la/2008537)."
                }
              ],
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "alternative_name": "y-self-end",
                  "version_added": "26"
                }
              ],
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "self-y-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-self-y-start",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "144"
                },
                {
                  "version_added": "143",
                  "version_removed": "144",
                  "partial_implementation": true,
                  "notes": "When `self-y-start` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                },
                {
                  "alternative_name": "y-self-start",
                  "version_added": "129",
                  "version_removed": "143",
                  "partial_implementation": true,
                  "notes": "When `y-self-start` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 438334710](https://crbug.com/438334710)."
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": [
                {
                  "version_added": "148"
                },
                {
                  "version_added": "147",
                  "version_removed": "148",
                  "partial_implementation": true,
                  "notes": "When `self-y-start` is used as a single keyword, or alongside `span-all`, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use `place-self: anchor-center` as a workaround. See [bug 2008537](https://bugzil.la/2008537)."
                }
              ],
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "alternative_name": "y-self-start",
                  "version_added": "26"
                }
              ],
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "span-all": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-all",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-block-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-block-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-block-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-block-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-bottom": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-bottom",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-inline-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-inline-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-inline-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-inline-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-left": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-left",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-right": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-right",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-self-block-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-block-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-self-block-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-block-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-self-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-self-inline-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-inline-end",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-self-inline-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-inline-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-self-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-start",
            "support": {
              "chrome": {
                "version_added": "129"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "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
            }
          }
        },
        "span-self-x-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-x-end",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "143"
                },
                {
                  "alternative_name": "span-x-self-end",
                  "version_added": "129",
                  "version_removed": "143"
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "alternative_name": "span-x-self-end",
                  "version_added": "26"
                }
              ],
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "span-self-x-start": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-x-start",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "143"
                },
                {
                  "alternative_name": "span-x-self-start",
                  "version_added": "129",
                  "version_removed": "143"
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "alternative_name": "span-x-self-start",
                  "version_added": "26"
                }
              ],
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "span-self-y-end": {
          "__compat": {
            "spec_url": "https://drafts.csswg.org/css-anchor-position-1/#valdef-position-area-span-self-y-end",
            "tags": [
              "web-features:anchor-positioning"
            ],
            "support": {
              "chrome": [
                {
                  "version_added": "143"
                },
                {
                  "alternative_name": "span-y-self-end",
                  "version_added": "129",
                  "version_removed": "143"
                }
              ],
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": [
                {
                  "version_added": "26.2"
                },
                {
                  "alternative_name": "span-y-self-end",
                  "version_added": "26"
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