{
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              "version_added": true
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              "version_added": true
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              "version_added": true
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              "version_added": true
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              "version_added": true
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              "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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            "description": "<code>__count__</code>",
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                "version_added": false
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              "chrome_android": {
                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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            "description": "<code>__noSuchMethod__</code>",
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": "1",
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                "version_added": "4",
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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              "experimental": false,
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            "description": "<code>__parent__</code>",
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              "chrome": {
                "version_added": false
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              "chrome_android": {
                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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                "version_added": false
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              "chrome": {
                "version_added": true
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              "chrome_android": {
                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": "1"
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                "version_added": "4"
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                "version_added": "11"
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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        },
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            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor",
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              "webview_android": {
                "version_added": true
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              "chrome": {
                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": "1"
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": true
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              "experimental": false,
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        },
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            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign",
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              "webview_android": {
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                "version_added": "45"
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                "version_added": true
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                "version_added": true
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                "version_added": false
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                "version_added": true
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        },
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            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/create",
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              "webview_android": {
                "version_added": true
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                "version_added": "5"
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": "4"
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              "firefox_android": {
                "version_added": "4"
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              "ie": {
                "version_added": "9"
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              "nodejs": {
                "version_added": true
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                "version_added": "11.6"
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                "version_added": "11.5"
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                "version_added": "5"
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                "version_added": true
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                "version_added": true
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              "standard_track": true,
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            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperties",
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                "version_added": true
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                "version_added": "5"
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": "4"
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                "version_added": "4"
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                "version_added": "9"
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              "nodejs": {
                "version_added": true
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                "version_added": "11.6"
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                "version_added": "5"
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              "safari_ios": {
                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": "54"
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              "chrome_android": {
                "version_added": "54"
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                "version_added": "14"
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              "edge_mobile": {
                "version_added": true
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                "version_added": "47"
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                "version_added": "47"
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              "ie": {
                "version_added": false
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                "version_added": "7"
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                "version_added": "41"
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                "version_added": "41"
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                "version_added": "10.1"
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            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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              "webview_android": {
                "version_added": true
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                "version_added": "6"
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                "version_added": true
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                "version_added": true
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                "version_added": true
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                "version_added": "4"
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                "version_added": "4"
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                "version_added": "9"
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              "nodejs": {
                "version_added": true
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                "version_added": "12"
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                "version_added": true
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                "version_added": "5.1"
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              "safari_ios": {
                "version_added": true
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                "version_added": true
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            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/getNotifier",
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              "webview_android": {
                "version_added": false
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                "version_added": "36",
                "version_removed": "52"
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                "version_added": false
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                "version_added": false
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                "version_added": false
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              "ie": {
                "version_added": false
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              "nodejs": {
                "version_added": false
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              "opera": {
                "version_added": false
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              "opera_android": {
                "version_added": false
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                "version_added": false
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              "safari_ios": {
                "version_added": false
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                "version_added": false
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            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
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          }
        },
        "getOwnPropertyDescriptor": {
          "__compat": {
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptor",
            "support": {
              "webview_android": {
                "version_added": true
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              "chrome": {
                "version_added": "5"
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              "chrome_android": {
                "version_added": true
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              "edge": {
                "version_added": true
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                "version_added": true
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                "version_added": "4"
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              "firefox_android": {
                "version_added": "4"
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              "ie": {
                "version_added": "8"
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              "nodejs": {
                "version_added": true
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              "opera": {
                "version_added": "12"
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              "opera_android": {
                "version_added": true
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              "safari": {
                "version_added": "5"
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              "safari_ios": {
                "version_added": true
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              "samsunginternet_android": {
                "version_added": true
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            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
        },
        "getOwnPropertyDescriptors": {
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            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptors",
            "support": {
              "webview_android": {
                "version_added": null
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              "chrome": {
                "version_added": "54"
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              "chrome_android": {
                "version_added": "54"
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                "version_added": "15"
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              "edge_mobile": {
                "version_added": true
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              "firefox": {
                "version_added": "50"
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              "firefox_android": {
                "version_added": "50"
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                "version_added": false
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              "nodejs": {
                "version_added": "7"
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                "version_added": "41"
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              "opera_android": {
                "version_added": null
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              "safari": {
                "version_added": "10"
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                "version_added": "6.0"
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            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
        },
        "getOwnPropertyNames": {
          "__compat": {
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyNames",
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              "webview_android": {
                "version_added": true
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              "chrome": {
                "version_added": "5"
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              "chrome_android": {
                "version_added": true
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              "edge": {
                "version_added": true
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              "edge_mobile": {
                "version_added": true
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              "firefox": {
                "version_added": "4"
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              "firefox_android": {
                "version_added": "4"
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              "ie": {
                "version_added": "9"
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              "nodejs": {
                "version_added": true
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              "opera": {
                "version_added": "12"
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              "opera_android": {
                "version_added": true
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              "safari": {
                "version_added": "5"
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              "safari_ios": {
                "version_added": true
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              "samsunginternet_android": {
                "version_added": true
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            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
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          }
        },
        "getOwnPropertySymbols": {
          "__compat": {
            "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertySymbols",
            "support": {
              "webview_android": {
                "version_added": "5.1"
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              "chrome": {
                "version_added": "38"
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              "chrome_android": {
                "version_added": "38"
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              "edge": {
                "version_added": true
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              "edge_mobile": {
                "version_added": true
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              "firefox": {
                "version_added": "36"
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              "firefox_android": {
                "version_added": "36"
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              "ie": {
                "version_added": false
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              "nodejs": {
                "version_added": true
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              "opera": {
                "version_added": "25"
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              "opera_android": {
                "version_added": "25"
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              "safari": {
                "version_added": "9"
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              "safari_ios": {
                "version_added": "9"
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              "samsunginternet_android": {
                "version_added": true
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            },
            "status": {
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              "standard_track": true,
              "deprecated": false
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          }
        },
        "getPrototypeOf": {
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              "chrome": {
                "version_added": "5"
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              "chrome_android": {
                "version_added": true
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              "edge": {
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                "version_added": true
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              "firefox_android": {
                "version_added": "4"
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              "ie": {
                "version_added": "9"
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              "nodejs": {
                "version_added": true
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                "version_added": "12.1"
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              "opera_android": {
                "version_added": true
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              "safari": {
                "version_added": "5"
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