mdn-browser-compat-data

{ "javascript": { "statements": { "async_function": { "__compat": { "description": "<code>async function</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/async_function", "spec_url": "https://tc39.es/ecma262/#sec-async-function-definitions", "support": { "chrome": { "version_added": "55" }, "chrome_android": { "version_added": "55" }, "edge": { "version_added": "15" }, "firefox": { "version_added": "52" }, "firefox_android": { "version_added": "52" }, "ie": { "version_added": false }, "nodejs": [ { "version_added": "7.6.0" }, { "version_added": "7.0.0", "flags": [ { "type": "runtime_flag", "name": "--harmony" } ] } ], "opera": { "version_added": "42" }, "opera_android": { "version_added": "42" }, "safari": { "version_added": "10.1" }, "safari_ios": { "version_added": "10.3" }, "samsunginternet_android": { "version_added": "6.0" }, "webview_android": { "version_added": "55" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "block": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/block", "spec_url": "https://tc39.es/ecma262/#sec-block", "support": { "chrome": { "version_added": "1" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "11" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "3" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "1" }, "safari_ios": { "version_added": "1" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "break": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/break", "spec_url": "https://tc39.es/ecma262/#sec-break-statement", "support": { "chrome": { "version_added": "1" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "3" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "4" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "1" }, "safari_ios": { "version_added": "1" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "class": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/class", "spec_url": "https://tc39.es/ecma262/#sec-class-definitions", "support": { "chrome": [ { "version_added": "49" }, { "version_removed": "49", "version_added": "42", "notes": "Strict mode is required." }, { "version_removed": "49", "version_added": "42", "flags": [ { "type": "preference", "name": "Experimental JavaScript", "value_to_set": "Enabled" } ] } ], "chrome_android": [ { "version_added": "49" }, { "version_removed": "49", "version_added": "42", "notes": "Strict mode is required." }, { "version_removed": "49", "version_added": "42", "flags": [ { "type": "preference", "name": "Experimental JavaScript", "value_to_set": "Enabled" } ] } ], "edge": { "version_added": "13" }, "firefox": { "version_added": "45" }, "firefox_android": { "version_added": "45" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": [ { "version_added": "36" }, { "version_removed": "36", "version_added": "29", "notes": "Strict mode is required." }, { "version_removed": "36", "version_added": "29", "flags": [ { "type": "preference", "name": "Experimental JavaScript", "value_to_set": "Enabled" } ] } ], "opera_android": [ { "version_added": "36" }, { "version_removed": "36", "version_added": "29", "notes": "Strict mode is required." }, { "version_removed": "36", "version_added": "29", "flags": [ { "type": "preference", "name": "Experimental JavaScript", "value_to_set": "Enabled" } ] } ], "safari": { "version_added": "10.1" }, "safari_ios": { "version_added": "10.3" }, "samsunginternet_android": [ { "version_added": "5.0" }, { "version_removed": "5.0", "version_added": "4.0", "notes": "Strict mode is required." } ], "webview_android": [ { "version_added": "49" }, { "version_removed": "49", "version_added": "42", "notes": "Strict mode is required." } ] }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "const": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/const", "spec_url": "https://tc39.es/ecma262/#sec-let-and-const-declarations", "support": { "chrome": { "version_added": "21" }, "chrome_android": { "version_added": "25" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "36", "notes": [ "Prior to Firefox 13, <code>const</code> is implemented, but re-assignment is not failing.", "Prior to Firefox 46, a <code>TypeError</code> was thrown on redeclaration instead of a <code>SyntaxError</code>." ] }, "firefox_android": { "version_added": "36", "notes": [ "Prior to Firefox 13, <code>const</code> is implemented, but re-assignment is not failing.", "Prior to Firefox 46, a <code>TypeError</code> was thrown on redeclaration instead of a <code>SyntaxError</code>." ] }, "ie": { "version_added": "11" }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": "9" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "5.1" }, "safari_ios": { "version_added": "6" }, "samsunginternet_android": { "version_added": "1.5" }, "webview_android": { "version_added": "≤37" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "continue": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/continue", "spec_url": "https://tc39.es/ecma262/#sec-continue-statement", "support": { "chrome": { "version_added": "1" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "3" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "4" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "1" }, "safari_ios": { "version_added": "1" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "debugger": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/debugger", "spec_url": "https://tc39.es/ecma262/#sec-debugger-statement", "support": { "chrome": { "version_added": "5" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "4" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "10" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "5" }, "safari_ios": { "version_added": "4.2" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "do_while": { "__compat": { "description": "<code>do...while</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/do...while", "spec_url": "https://tc39.es/ecma262/#sec-do-while-statement", "support": { "chrome": { "version_added": "1" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "4" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "4" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "1" }, "safari_ios": { "version_added": "1" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "empty": { "__compat": { "description": "Empty statement (<code>;</code>)", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/Empty", "spec_url": "https://tc39.es/ecma262/#sec-empty-statement", "support": { "chrome": { "version_added": "3" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "3" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "3" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "5" }, "safari_ios": { "version_added": "4.2" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "export": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/export", "spec_url": "https://tc39.es/ecma262/#sec-exports", "support": { "chrome": { "version_added": "61" }, "chrome_android": { "version_added": "61" }, "edge": [ { "version_added": "16" }, { "version_added": "15", "flags": [ { "name": "Experimental JavaScript Features", "type": "preference" } ] } ], "firefox": [ { "version_added": "60" }, { "version_added": "54", "version_removed": "60", "flags": [ { "name": "dom.moduleScripts.enabled", "type": "preference" } ] } ], "firefox_android": [ { "version_added": "60" }, { "version_added": "54", "version_removed": "60", "flags": [ { "name": "dom.moduleScripts.enabled", "type": "preference" } ] } ], "ie": { "version_added": false }, "nodejs": [ { "version_added": "13.2.0", "notes": "Modules must either have a filename ending in <code>.mjs</code>, or the nearest parent <code>package.json</code> file must contain <code>\"type\": \"module\"</code>. See Node's <a href='https://nodejs.org/api/esm.html#esm_enabling'>ECMAScript Modules documentation</a> for more details." }, { "version_added": "12.0.0", "flags": [ { "name": "--experimental-modules", "type": "runtime_flag" } ], "notes": "Modules must either have a filename ending in <code>.mjs</code>, or the nearest parent <code>package.json</code> file must contain <code>\"type\": \"module\"</code>. See Node's <a href='https://nodejs.org/docs/latest-v12.x/api/esm.html#esm_enabling'>ECMAScript Modules documentation</a> for more details." }, { "version_added": "8.5.0", "flags": [ { "name": "--experimental-modules", "type": "runtime_flag" } ], "notes": "Module filenames must end with <code>.mjs</code>, not </code>.js</code>. See Node's <a href='https://nodejs.org/docs/latest-v8.x/api/esm.html#esm_enabling'>ECMAScript Modules documentation</a> for more details." } ], "opera": { "version_added": "48" }, "opera_android": { "version_added": "45" }, "safari": { "version_added": "10.1" }, "safari_ios": { "version_added": "10.3" }, "samsunginternet_android": { "version_added": "8.0" }, "webview_android": { "version_added": false } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "default": { "__compat": { "description": "<code>default</code> keyword with <code>export</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/default", "spec_url": "https://tc39.es/ecma262/#sec-exports", "support": { "chrome": { "version_added": "61" }, "chrome_android": { "version_added": "61" }, "edge": [ { "version_added": "16" }, { "version_added": "15", "flags": [ { "name": "Experimental JavaScript Features", "type": "preference" } ] } ], "firefox": [ { "version_added": "60" }, { "version_added": "54", "version_removed": "60", "flags": [ { "name": "dom.moduleScripts.enabled", "type": "preference" } ] } ], "firefox_android": [ { "version_added": "60" }, { "version_added": "54", "version_removed": "60", "flags": [ { "name": "dom.moduleScripts.enabled", "type": "preference" } ] } ], "ie": { "version_added": false }, "nodejs": [ { "version_added": "13.2.0", "notes": "Modules must either have a filename ending in <code>.mjs</code>, or the nearest parent <code>package.json</code> file must contain <code>\"type\": \"module\"</code>. See Node's <a href='https://nodejs.org/api/esm.html#esm_enabling'>ECMAScript Modules documentation</a> for more details." }, { "version_added": "12.0.0", "flags": [ { "name": "--experimental-modules", "type": "runtime_flag" } ], "notes": "Modules must either have a filename ending in <code>.mjs</code>, or the nearest parent <code>package.json</code> file must contain <code>\"type\": \"module\"</code>. See Node's <a href='https://nodejs.org/docs/latest-v12.x/api/esm.html#esm_enabling'>ECMAScript Modules documentation</a> for more details." }, { "version_added": "8.5.0", "flags": [ { "name": "--experimental-modules", "type": "runtime_flag" } ], "notes": "Module filenames must end with <code>.mjs</code>, not </code>.js</code>. See Node's <a href='https://nodejs.org/docs/latest-v8.x/api/esm.html#esm_enabling'>ECMAScript Modules documentation</a> for more details." } ], "opera": { "version_added": "48" }, "opera_android": { "version_added": "45" }, "safari": { "version_added": "10.1" }, "safari_ios": { "version_added": "10.3" }, "samsunginternet_android": { "version_added": "8.0" }, "webview_android": { "version_added": false } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "namespace": { "__compat": { "description": "<code>export * as namespace</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/export", "spec_url": "https://tc39.es/ecma262/#sec-exports", "support": { "chrome": { "version_added": "72" }, "chrome_android": { "version_added": "72" }, "edge": { "version_added": "79" }, "firefox": { "version_added": "80" }, "firefox_android": { "version_added": false }, "ie": { "version_added": false }, "nodejs": { "version_added": "12.0.0" }, "opera": { "version_added": "60" }, "opera_android": { "version_added": "51" }, "safari": { "version_added": false }, "safari_ios": { "version_added": false }, "samsunginternet_android": { "version_added": "11.0" }, "webview_android": { "version_added": false } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } }, "for": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/for", "spec_url": "https://tc39.es/ecma262/#sec-for-statement", "support": { "chrome": { "version_added": "1" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "3" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "3" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "1" }, "safari_ios": { "version_added": "1" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "for_await_of": { "__compat": { "description": "<code>for await...of</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/for-await...of", "spec_url": "https://tc39.es/ecma262/#sec-for-in-and-for-of-statements", "support": { "chrome": { "version_added": "63" }, "chrome_android": { "version_added": "63" }, "edge": { "version_added": "79" }, "firefox": { "version_added": "57" }, "firefox_android": { "version_added": "57" }, "ie": { "version_added": false }, "nodejs": [ { "version_added": "10.0.0" }, { "version_added": "8.10.0", "version_removed": "10.0.0", "flags": [ { "type": "runtime_flag", "name": "--harmony-async-iteration" } ] } ], "opera": { "version_added": "50" }, "opera_android": { "version_added": "46" }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "8.0" }, "webview_android": { "version_added": "63" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "for_in": { "__compat": { "description": "<code>for...in</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/for...in", "spec_url": "https://tc39.es/ecma262/#sec-for-in-and-for-of-statements", "support": { "chrome": { "version_added": "1" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "6" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "2" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "1" }, "safari_ios": { "version_added": "1" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "for_of": { "__compat": { "description": "<code>for...of</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/for...of", "spec_url": "https://tc39.es/ecma262/#sec-for-in-and-for-of-statements", "support": { "chrome": { "version_added": "38" }, "chrome_android": { "version_added": "38" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "13", "notes": "Prior to Firefox 51, using the <code>for...of</code> loop construct with the <code>const</code> keyword threw a <code>SyntaxError</code> (\"missing = in const declaration\")." }, "firefox_android": { "version_added": "14", "notes": "Prior to Firefox 51, using the <code>for...of</code> loop construct with the <code>const</code> keyword threw a <code>SyntaxError</code> (\"missing = in const declaration\")." }, "ie": { "version_added": false }, "nodejs": { "version_added": "0.12" }, "opera": { "version_added": "25" }, "opera_android": { "version_added": "25" }, "safari": { "version_added": "7" }, "safari_ios": { "version_added": "7" }, "samsunginternet_android": { "version_added": "3.0" }, "webview_android": { "version_added": "38" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "async_iterators": { "__compat": { "description": "async iterators", "support": { "chrome": { "version_added": "63" }, "chrome_android": { "version_added": "63" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "57" }, "firefox_android": { "version_added": "57" }, "ie": { "version_added": false }, "nodejs": { "version_added": "10.0.0" }, "opera": { "version_added": "50" }, "opera_android": { "version_added": "46" }, "safari": { "version_added": "7" }, "safari_ios": { "version_added": "7" }, "samsunginternet_android": { "version_added": "8.0" }, "webview_android": { "version_added": "63" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "closing_iterators": { "__compat": { "description": "Closing iterators", "support": { "chrome": { "version_added": "51" }, "chrome_android": { "version_added": "51" }, "edge": { "version_added": "14" }, "firefox": { "version_added": "53" }, "firefox_android": { "version_added": "53" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.5.0" }, "opera": { "version_added": "38" }, "opera_android": { "version_added": "41" }, "safari": { "version_added": "7" }, "safari_ios": { "version_added": "7" }, "samsunginternet_android": { "version_added": "5.0" }, "webview_android": { "version_added": "51" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } }, "function": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function", "spec_url": "https://tc39.es/ecma262/#sec-function-definitions", "support": { "chrome": { "version_added": "1" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "1" }, "firefox_android": { "version_added": "4" }, "ie": { "version_added": "3" }, "nodejs": { "version_added": "0.1.100" }, "opera": { "version_added": "3" }, "opera_android": { "version_added": "10.1" }, "safari": { "version_added": "1" }, "safari_ios": { "version_added": "1" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "1" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "trailing_comma_in_parameters": { "__compat": { "description": "Trailing comma in parameters", "support": { "chrome": { "version_added": "58" }, "chrome_android": { "version_added": "58" }, "edge": { "version_added": "14" }, "firefox": { "version_added": "52" }, "firefox_android": { "version_added": "52" }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "45" }, "opera_android": { "version_added": "43" }, "safari": { "version_added": "10" }, "safari_ios": { "version_added": "10" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "58" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } }, "generator_function": { "__compat": { "description": "<code>function*</code>", "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function*", "spec_url": "https://tc39.es/ecma262/#sec-generator-function-definitions", "support": { "chrome": { "version_added": "39" }, "chrome_android": { "version_added": "39" }, "edge": { "version_added": "13" }, "firefox": { "version_added": "26" }, "firefox_android": { "version_added": "26" }, "ie": { "version_added": false }, "nodejs": [ { "version_added": "4.0.0" }, { "version_added": "0.12", "flags": [ { "type": "runtime_flag", "name": "--harmony" } ] } ], "opera": { "version_added": "26" }, "opera_android": { "version_added": "26" }, "safari": { "version_added": "10" }, "safari_ios": { "version_added": "10" }, "samsunginternet_android": { "version_added": "4.0" }, "webview_android": { "version_added": "39" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "IteratorResult_object": { "__compat": { "description": "<code>IteratorResult</code> object instead of throwing", "support": { "chrome": { "version_added": "49" }, "chrome_android": { "version_added": "49" }, "edge": { "version_added": "13" }, "firefox": { "version_added": "29" }, "firefox_android": { "version_added": "29" }, "ie": { "version_added": false }, "nodejs": { "version_added": "6.0.0" }, "opera": { "version_added": "36" }, "opera_android": { "version_added": "36" }, "safari": { "version_added": "10" }, "safari_ios": { "version_added": "10" }, "samsunginternet_android": { "version_added": "5.0" }, "webview_android": { "version_added": "49" } }, "status": { "experimental": false, 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