{ "javascript": { "builtins": { "Symbol": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol-objects", "support": { "chrome": { "version_added": "38" }, "chrome_android": { "version_added": "38" }, "edge": { "version_added": "12", "notes": "Edge 12 included Symbol properties in JSON.stringify() output." }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "version_added": true }, "opera": { "version_added": "25" }, "opera_android": { "version_added": "25" }, "safari": { "version_added": "9" }, "safari_ios": { "version_added": "9" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "38" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "asyncIterator": { "__compat": { "support": { "chrome": { "version_added": "63" }, "chrome_android": { "version_added": "63" }, "edge": { "version_added": false }, "edge_mobile": { "version_added": false }, "firefox": { "version_added": false, "notes": "Available in Firefox Nightly." }, "firefox_android": { "version_added": false }, "ie": { "version_added": false }, "nodejs": { "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": "63" } }, "status": { "experimental": true, "standard_track": true, "deprecated": false } } }, "description": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/description", "spec_url": "https://tc39.github.io/proposal-Symbol-description/#sec-symbol.prototype.description", "support": { "chrome": { "version_added": "70" }, "chrome_android": { "version_added": "70" }, "edge": { "version_added": false }, "edge_mobile": { "version_added": false }, "firefox": { "version_added": "63" }, "firefox_android": { "version_added": "63" }, "ie": { "version_added": false }, "nodejs": { "version_added": false }, "opera": { "version_added": "57" }, "opera_android": { "version_added": "57" }, "safari": { "version_added": false }, "safari_ios": { "version_added": false }, "samsunginternet_android": { "version_added": false }, "webview_android": { "version_added": "70" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "for": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/for", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.for", "support": { "chrome": { "version_added": "40" }, "chrome_android": { "version_added": "40" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "version_added": true }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": "9" }, "safari_ios": { "version_added": "9" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "40" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "hasInstance": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/hasInstance", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.hasinstance", "support": { "chrome": { "version_added": "50" }, "chrome_android": { "version_added": "50" }, "edge": { "version_added": "15" }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "50" }, "firefox_android": { "version_added": "50" }, "ie": { "version_added": false }, "nodejs": [ { "version_added": "6.5.0" }, { "version_added": "6.0.0", "flags": [ { "type": "runtime_flag", "name": "--harmony" } ] } ], "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "50" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "isConcatSpreadable": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/isConcatSpreadable", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.isconcatspreadable", "support": { "chrome": { "version_added": "48" }, "chrome_android": { "version_added": "48" }, "edge": { "version_added": "15" }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "48" }, "firefox_android": { "version_added": "48" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "48" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "iterator": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/iterator", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.iterator", "support": { "chrome": { "version_added": "43" }, "chrome_android": { "version_added": "43" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "version_added": "0.12" }, "opera": { "version_added": "30" }, "opera_android": { "version_added": true }, "safari": { "version_added": "10" }, "safari_ios": { "version_added": "10" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "43" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "keyFor": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/keyFor", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.keyfor", "support": { "chrome": { "version_added": "40" }, "chrome_android": { "version_added": "40" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "version_added": true }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": "9" }, "safari_ios": { "version_added": "9" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "40" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "match": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/match", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.match", "support": { "chrome": { "version_added": "50" }, "chrome_android": { "version_added": "50" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "40" }, "firefox_android": { "version_added": "40" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "50" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "matchAll": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/matchAll", "spec_url": "https://tc39.github.io/proposal-string-matchall/#Symbol.matchAll", "support": { "chrome": { "version_added": "73" }, "chrome_android": { "version_added": "73" }, "edge": { "version_added": false }, "edge_mobile": { "version_added": false }, "firefox": { "version_added": false }, "firefox_android": { "version_added": false }, "ie": { "version_added": false }, "nodejs": { "version_added": false }, "opera": { "version_added": "60" }, "opera_android": { "version_added": true }, "safari": { "version_added": false }, "safari_ios": { "version_added": false }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "73" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "prototype": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/prototype", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.prototype", "support": { "chrome": { "version_added": "38" }, "chrome_android": { "version_added": "38" }, "edge": { "version_added": "12" }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "version_added": true }, "opera": { "version_added": "25" }, "opera_android": { "version_added": "25" }, "safari": { "version_added": "9" }, "safari_ios": { "version_added": "9" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "38" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "replace": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/replace", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.replace", "support": { "chrome": { "version_added": "50" }, "chrome_android": { "version_added": "50" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "49" }, "firefox_android": { "version_added": "49" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "50" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "search": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/search", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.search", "support": { "chrome": { "version_added": "50" }, "chrome_android": { "version_added": "50" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "49" }, "firefox_android": { "version_added": "49" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "50" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "species": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/species", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.species", "support": { "chrome": { "version_added": "51" }, "chrome_android": { "version_added": "51" }, "edge": { "version_added": "14" }, "edge_mobile": { "version_added": "14" }, "firefox": { "version_added": "41" }, "firefox_android": { "version_added": "41" }, "ie": { "version_added": false }, "nodejs": [ { "version_added": "6.5.0" }, { "version_added": "6.0.0", "flags": [ { "type": "runtime_flag", "name": "--harmony" } ] } ], "opera": { "version_added": "38" }, "opera_android": { "version_added": "38" }, "safari": { "version_added": "10" }, "safari_ios": { "version_added": "10" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "51" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "split": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/split", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.split", "support": { "chrome": { "version_added": "50" }, "chrome_android": { "version_added": "50" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "49" }, "firefox_android": { "version_added": "49" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "50" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "toPrimitive": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toPrimitive", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.toprimitive", "support": { "chrome": { "version_added": "47" }, "chrome_android": { "version_added": "47" }, "edge": { "version_added": "15" }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "44" }, "firefox_android": { "version_added": "44" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "47" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "toSource": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toSource", "support": { "chrome": { "version_added": false }, "chrome_android": { "version_added": false }, "edge": { "version_added": false }, "edge_mobile": { "version_added": false }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "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": false, "deprecated": false } } }, "toString": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toString", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.prototype.tostring", "support": { "chrome": { "version_added": "38" }, "chrome_android": { "version_added": "38" }, "edge": { "version_added": "12" }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "version_added": true }, "opera": { "version_added": "25" }, "opera_android": { "version_added": "25" }, "safari": { "version_added": "9" }, "safari_ios": { "version_added": "9" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "38" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "toStringTag": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toStringTag", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.tostringtag", "support": { "chrome": { "version_added": "49" }, "chrome_android": { "version_added": "49" }, "edge": { "version_added": "15" }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "51" }, "firefox_android": { "version_added": "51" }, "ie": { "version_added": false }, "nodejs": [ { "version_added": "6.0.0" }, { "version_added": "4.0.0", "flags": [ { "type": "runtime_flag", "name": "--harmony" } ] } ], "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": true }, "safari_ios": { "version_added": true }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "49" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "unscopables": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/unscopables", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.unscopables", "support": { "chrome": { "version_added": "45" }, "chrome_android": { "version_added": "45" }, "edge": { "version_added": true }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "48" }, "firefox_android": { "version_added": "48" }, "ie": { "version_added": false }, "nodejs": { "version_added": "0.12" }, "opera": { "version_added": true }, "opera_android": { "version_added": true }, "safari": { "version_added": "9" }, "safari_ios": { "version_added": "9" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "45" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "valueOf": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/valueOf", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.prototype.valueof", "support": { "chrome": { "version_added": "38" }, "chrome_android": { "version_added": "38" }, "edge": { "version_added": "12" }, "edge_mobile": { "version_added": true }, "firefox": { "version_added": "36" }, "firefox_android": { "version_added": "36" }, "ie": { "version_added": false }, "nodejs": { "version_added": true }, "opera": { "version_added": "25" }, "opera_android": { "version_added": "25" }, "safari": { "version_added": "9" }, "safari_ios": { "version_added": "9" }, "samsunginternet_android": { "version_added": true }, "webview_android": { "version_added": "38" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "@@toPrimitive": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol/@@toPrimitive", "spec_url": "https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive", "support": { "chrome": { "version_added": null }, "chrome_android": { "version_added": null }, "edge": { "version_added": null }, "edge_mobile": { "version_added": null }, "firefox": { "version_added": "44" }, "firefox_android": { "version_added": "44" }, "ie": { "version_added": false }, "nodejs": { "version_added": null }, "opera": { "version_added": null }, "opera_android": { "version_added": null }, "safari": { "version_added": null }, "safari_ios": { "version_added": null }, "samsunginternet_android": { "version_added": null }, "webview_android": { "version_added": null } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } } } } }