{
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          ],
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            },
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            },
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          },
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          }
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        "__compat": {
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          "spec_url": "https://dom.spec.whatwg.org/#dom-parentnode-childelementcount",
          "tags": [
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          ],
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            },
            "chrome_android": "mirror",
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            },
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            },
            "firefox_android": "mirror",
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            },
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          ],
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            },
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            },
            "oculus": "mirror",
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          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "getElementById": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/DocumentFragment/getElementById",
          "spec_url": "https://dom.spec.whatwg.org/#dom-nonelementparentnode-getelementbyid",
          "tags": [
            "web-features:dom"
          ],
          "support": {
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            },
            "chrome_android": "mirror",
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            },
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            },
            "firefox_android": "mirror",
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            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
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            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
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            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "lastElementChild": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/DocumentFragment/lastElementChild",
          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-lastelementchild①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
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              "version_added": "29"
            },
            "chrome_android": "mirror",
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            },
            "firefox": {
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            },
            "firefox_android": "mirror",
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            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
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            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
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          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
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      "moveBefore": {
        "__compat": {
          "support": {
            "chrome": {
              "version_added": "133"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": false
            },
            "firefox_android": "mirror",
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              "version_added": false
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
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            },
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            "standard_track": true,
            "deprecated": false
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        }
      },
      "prepend": {
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          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-prepend①",
          "tags": [
            "web-features:dom"
          ],
          "support": {
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            "oculus": "mirror",
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            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
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          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-queryselector①",
          "tags": [
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          "support": {
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              {
                "version_added": "8",
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              }
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            "safari_ios": {
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            "standard_track": true,
            "deprecated": false
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          "tags": [
            "web-features:dom"
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                "version_added": "8",
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              }
            ],
            "oculus": "mirror",
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            },
            "opera_android": {
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            "safari_ios": {
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          },
          "status": {
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            "standard_track": true,
            "deprecated": false
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        }
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      "replaceChildren": {
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          "spec_url": "https://dom.spec.whatwg.org/#ref-for-dom-parentnode-replacechildren①",
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}