mdn-browser-compat-data

{ "javascript": { "builtins": { "WebAssembly": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly", "spec_url": "https://webassembly.github.io/spec/js-api/#the-webassembly-object", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "CompileError": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/CompileError", "spec_url": [ "https://webassembly.github.io/spec/js-api/#constructor-properties-of-the-webassembly-object", "https://tc39.github.io/ecma262/#sec-native-error-types-used-in-this-standard" ], "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "Global": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Global", "spec_url": "https://webassembly.github.io/spec/js-api/#globals", "support": { "chrome": { "version_added": "69" }, "chrome_android": { "version_added": "69" }, "edge": { "version_added": false }, "edge_mobile": { "version_added": false }, "firefox": { "version_added": "62" }, "firefox_android": { "version_added": "62" }, "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": "69" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "value": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Global/value", "support": { "chrome": { "version_added": "69" }, "chrome_android": { "version_added": "69" }, "edge": { "version_added": false }, "edge_mobile": { "version_added": false }, "firefox": { "version_added": "62" }, "firefox_android": { "version_added": "62" }, "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": "69" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "valueOf": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Global/valueOf", "support": { "chrome": { "version_added": "69" }, "chrome_android": { "version_added": "69" }, "edge": { "version_added": false }, "edge_mobile": { "version_added": false }, "firefox": { "version_added": "62" }, "firefox_android": { "version_added": "62" }, "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": "69" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } }, "Instance": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblyinstance-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "exports": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance/exports", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblyinstance-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "prototype": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance/prototype", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymodule-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } }, "LinkError": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/LinkError", "spec_url": [ "https://webassembly.github.io/spec/js-api/#constructor-properties-of-the-webassembly-object", "https://tc39.github.io/ecma262/#sec-native-error-types-used-in-this-standard" ], "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "Memory": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymemory-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "buffer": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory/buffer", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymemoryprototypebuffer", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "grow": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory/grow", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymemoryprototypegrow", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "prototype": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory/prototype", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymemory-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } }, "Module": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymodule-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "customSections": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/customSections", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymodulecustomsections", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "exports": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/exports", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymoduleexports", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "imports": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/imports", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymoduleimports", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "prototype": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/prototype", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblymodule-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } } }, "RuntimeError": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/RuntimeError", "spec_url": [ "https://webassembly.github.io/spec/js-api/#constructor-properties-of-the-webassembly-object", "https://tc39.github.io/ecma262/#sec-native-error-types-used-in-this-standard" ], "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "Table": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblytable-objects", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "get": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/get", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblytableprototypeget", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "grow": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/grow", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblytableprototypegrow", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "firefox_android": { "version_added": "52", "notes": "Disabled in the Firefox 52 Extended Support Release (ESR)." }, "ie": { "version_added": false }, "nodejs": { "version_added": "8.0.0" }, "opera": { "version_added": "44" }, "opera_android": { "version_added": null }, "safari": { "version_added": "11" }, "safari_ios": { "version_added": "11" }, "samsunginternet_android": { "version_added": "7.0" }, "webview_android": { "version_added": "57" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } } }, "length": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/length", "spec_url": "https://webassembly.github.io/spec/js-api/#webassemblytableprototypelength", "support": { "chrome": { "version_added": "57" }, "chrome_android": { "version_added": "57" }, "edge": { "version_added": "16" }, "edge_mobile": { "version_added": true, "flags": [ { "type": "preference", "name": "Experimental JavaScript Features" } ] }, "firefox": { "version_added": "52", "notes": 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