| { |
| "javascript": { |
| "builtins": { |
| "WeakMap": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap", |
| "spec_url": "https://tc39.es/ecma262/multipage/keyed-collections.html#sec-weakmap-objects", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "36" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "6" |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "11" |
| }, |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "8" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| }, |
| "WeakMap": { |
| "__compat": { |
| "description": "`WeakMap()` constructor", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/WeakMap", |
| "spec_url": "https://tc39.es/ecma262/multipage/keyed-collections.html#sec-weakmap-constructor", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "36" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "6" |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "11" |
| }, |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "8" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| }, |
| "iterable_allowed": { |
| "__compat": { |
| "description": "`new WeakMap(iterable)`", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "38" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "36" |
| }, |
| "firefox_android": "mirror", |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "9" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "null_allowed": { |
| "__compat": { |
| "description": "`new WeakMap(null)`", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "36" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "37" |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "11" |
| }, |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "8" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| } |
| }, |
| "delete": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/delete", |
| "spec_url": "https://tc39.es/ecma262/multipage/keyed-collections.html#sec-weakmap.prototype.delete", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "36" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "6", |
| "notes": "Before Firefox 38, this method threw a `TypeError` when the key parameter was not an object. This has been fixed in version 38 and later to return `false` as per the ES2015 standard." |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "11" |
| }, |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "8" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "get": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/get", |
| "spec_url": "https://tc39.es/ecma262/multipage/keyed-collections.html#sec-weakmap.prototype.get", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "36" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "6", |
| "notes": "Before Firefox 38, this method threw a `TypeError` when the key parameter was not an object. However, the ES2015 specification specifies to return `undefined` instead. Furthermore, `WeakMap.prototype.get` accepted an optional second argument as a fallback value, which is not part of the standard. Both non-standard behaviors are removed in version 38 and higher." |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "11" |
| }, |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "8" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "getOrInsert": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/getOrInsert", |
| "spec_url": "https://tc39.es/proposal-upsert/#sec-weakmap.prototype.getOrInsert", |
| "support": { |
| "bun": { |
| "version_added": "1.2.20" |
| }, |
| "chrome": { |
| "version_added": false |
| }, |
| "chrome_android": "mirror", |
| "edge": "mirror", |
| "firefox": { |
| "version_added": "144" |
| }, |
| "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 |
| } |
| } |
| }, |
| "getOrInsertComputed": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/getOrInsertComputed", |
| "spec_url": "https://tc39.es/proposal-upsert/#sec-weakmap.prototype.getOrInsertComputed", |
| "support": { |
| "bun": { |
| "version_added": "1.2.20" |
| }, |
| "chrome": { |
| "version_added": false |
| }, |
| "chrome_android": "mirror", |
| "edge": "mirror", |
| "firefox": { |
| "version_added": "144" |
| }, |
| "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 |
| } |
| } |
| }, |
| "has": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/has", |
| "spec_url": "https://tc39.es/ecma262/multipage/keyed-collections.html#sec-weakmap.prototype.has", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "36" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "6", |
| "notes": "Before Firefox 38, this method threw a `TypeError` when the key parameter was not an object. This has been fixed in version 38 and later to return `false` as per the ES2015 standard." |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "11" |
| }, |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "8" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "set": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/set", |
| "spec_url": "https://tc39.es/ecma262/multipage/keyed-collections.html#sec-weakmap.prototype.set", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2015", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "36" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "6", |
| "notes": "Before Firefox 38, this method threw a `TypeError` when the key parameter was not an object. This has been fixed in version 38 and later to return `false` as per the ES2015 standard." |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "11", |
| "partial_implementation": true, |
| "notes": "Returns 'undefined' instead of the 'Map' object." |
| }, |
| "nodejs": { |
| "version_added": "0.12.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "8" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "symbol_as_keys": { |
| "__compat": { |
| "description": "Non-registered symbols as keys", |
| "tags": [ |
| "web-features:snapshot:ecmascript-2023", |
| "web-features:weakmap" |
| ], |
| "support": { |
| "bun": { |
| "version_added": "1.0.0" |
| }, |
| "chrome": { |
| "version_added": "109" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.28" |
| }, |
| "edge": "mirror", |
| "firefox": { |
| "version_added": "146" |
| }, |
| "firefox_android": "mirror", |
| "nodejs": { |
| "version_added": "20.1.0" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "16.4" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
