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| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-class-definitions", |
| "tags": [ |
| "web-features:class-syntax", |
| "web-features:snapshot:ecmascript-2015" |
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| "notes": "Strict mode is required." |
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| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
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| "standard_track": true, |
| "deprecated": false |
| } |
| }, |
| "constructor": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/constructor", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-static-semantics-constructormethod", |
| "tags": [ |
| "web-features:class-syntax", |
| "web-features:snapshot:ecmascript-2015" |
| ], |
| "support": { |
| "chrome": [ |
| { |
| "version_added": "49" |
| }, |
| { |
| "version_added": "42", |
| "version_removed": "49", |
| "notes": "Strict mode is required." |
| } |
| ], |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
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| "edge": { |
| "version_added": "13" |
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| "firefox": { |
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| "opera_android": "mirror", |
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| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "extends": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/extends", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-class-definitions", |
| "tags": [ |
| "web-features:class-syntax", |
| "web-features:snapshot:ecmascript-2015" |
| ], |
| "support": { |
| "chrome": [ |
| { |
| "version_added": "49" |
| }, |
| { |
| "version_added": "42", |
| "version_removed": "49", |
| "notes": "Strict mode is required." |
| } |
| ], |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
| "version_added": "13" |
| }, |
| "firefox": { |
| "version_added": "45" |
| }, |
| "firefox_android": "mirror", |
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| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
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| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "private_class_fields": { |
| "__compat": { |
| "description": "Private class fields", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/Private_elements", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-lexical-grammar.html#prod-PrivateIdentifier", |
| "tags": [ |
| "web-features:class-syntax" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "74" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
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| "edge": "mirror", |
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| "oculus": "mirror", |
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| "opera_android": "mirror", |
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| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "private_class_fields_in": { |
| "__compat": { |
| "description": "Private class fields 'in'", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/Private_elements", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-expressions.html#prod-00OK517S", |
| "tags": [ |
| "web-features:class-syntax" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "91" |
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| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.9" |
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| "edge": "mirror", |
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| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
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| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "private_class_methods": { |
| "__compat": { |
| "description": "Private class methods", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/Private_elements", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-lexical-grammar.html#prod-PrivateIdentifier", |
| "tags": [ |
| "web-features:class-syntax" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "84" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": "mirror", |
| "firefox": { |
| "version_added": "90" |
| }, |
| "firefox_android": "mirror", |
| "nodejs": { |
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| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "15" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "public_class_fields": { |
| "__compat": { |
| "description": "Public class fields", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/Public_class_fields", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#prod-FieldDefinition", |
| "tags": [ |
| "web-features:class-syntax" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "72" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": "mirror", |
| "firefox": { |
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| "firefox_android": "mirror", |
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| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": [ |
| { |
| "version_added": "16" |
| }, |
| { |
| "version_added": "14.1", |
| "version_removed": "16", |
| "partial_implementation": true, |
| "notes": "Parentheses in field initializers can lead to `ReferenceError`s. See [bug 236843](https://webkit.org/b/236843)." |
| }, |
| { |
| "version_added": "14", |
| "version_removed": "14.1", |
| "partial_implementation": true, |
| "notes": "Doesn't support public static fields. See [bug 194095](https://webkit.org/b/194095)." |
| } |
| ], |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "static": { |
| "__compat": { |
| "description": "`static` keyword", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/static", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-class-definitions", |
| "tags": [ |
| "web-features:class-syntax", |
| "web-features:snapshot:ecmascript-2015" |
| ], |
| "support": { |
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| { |
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| }, |
| { |
| "version_added": "42", |
| "version_removed": "49", |
| "notes": "Strict mode is required." |
| } |
| ], |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": { |
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| }, |
| "firefox": { |
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| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| }, |
| "class_fields": { |
| "__compat": { |
| "description": "Static class fields", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/Public_class_fields", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#prod-FieldDefinition", |
| "tags": [ |
| "web-features:class-syntax" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "72" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.0" |
| }, |
| "edge": "mirror", |
| "firefox": { |
| "version_added": "75" |
| }, |
| "firefox_android": "mirror", |
| "nodejs": { |
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| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "14.1" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| }, |
| "initialization_blocks": { |
| "__compat": { |
| "description": "Static initialization blocks", |
| "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Classes/Static_initialization_blocks", |
| "spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#prod-ClassStaticBlock", |
| "tags": [ |
| "web-features:class-syntax" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "94" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.14" |
| }, |
| "edge": "mirror", |
| "firefox": { |
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| "firefox_android": "mirror", |
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| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
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| "safari_ios": "mirror", |
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| "webview_android": "mirror", |
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| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
