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statements.json
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{
"javascript": {
"statements": {
"async_function": {
"__compat": {
"description": "<code>async function</code> statement",
"mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/async_function",
"spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-async-function-definitions",
"support": {
"chrome": {
"version_added": "55"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "15"
},
"firefox": {
"version_added": "52"
},
"firefox_android": "mirror",
"ie": {
"version_added": false
},
"nodejs": [
{
"version_added": "7.6.0"
},
{
"version_added": "7.0.0",
"flags": [
{
"type": "runtime_flag",
"name": "--harmony"
}
]
}
],
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "10.1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
}
},
"async_generator_function": {
"__compat": {
"description": "<code>async function*</code> statement",
"mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/async_function*",
"spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-async-generator-function-definitions",
"support": {
"chrome": {
"version_added": "63"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": "mirror",
"firefox": {
"version_added": "55"
},
"firefox_android": "mirror",
"ie": {
"version_added": false
},
"nodejs": [
{
"version_added": "10.0.0"
},
{
"version_added": "8.10.0",
"flags": [
{
"type": "runtime_flag",
"name": "--harmony"
}
]
}
],
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "12"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-block",
"support": {
"chrome": {
"version_added": "1"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "11"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "3"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-break-statement",
"support": {
"chrome": {
"version_added": "1"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "3"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "4"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-functions-and-classes.html#sec-class-definitions",
"support": {
"chrome": [
{
"version_added": "49"
},
{
"version_removed": "49",
"version_added": "42",
"notes": "Strict mode is required."
}
],
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "13"
},
"firefox": {
"version_added": "45"
},
"firefox_android": "mirror",
"ie": {
"version_added": false
},
"nodejs": {
"version_added": "6.0.0"
},
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "10.1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-let-and-const-declarations",
"support": {
"chrome": {
"version_added": "21"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "36",
"notes": [
"Before Firefox 13, <code>const</code> is implemented, but re-assignment is not failing.",
"Before Firefox 46, a <code>TypeError</code> was thrown on redeclaration instead of a <code>SyntaxError</code>."
]
},
"firefox_android": "mirror",
"ie": {
"version_added": "11"
},
"nodejs": {
"version_added": "6.0.0"
},
"oculus": "mirror",
"opera": {
"version_added": "9"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "5.1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-continue-statement",
"support": {
"chrome": {
"version_added": "1"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "3"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "4"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-debugger-statement",
"support": {
"chrome": {
"version_added": "5"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "4"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "10"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "5"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-do-while-statement",
"support": {
"chrome": {
"version_added": "1"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "4"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "4"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-empty-statement",
"support": {
"chrome": {
"version_added": "3"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "3"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "3"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "5"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-scripts-and-modules.html#sec-exports",
"support": {
"chrome": {
"version_added": "61"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "16"
},
"firefox": {
"version_added": "60"
},
"firefox_android": "mirror",
"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."
}
],
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "10.1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/export",
"spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-scripts-and-modules.html#sec-exports",
"support": {
"chrome": {
"version_added": "61"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "16"
},
"firefox": {
"version_added": "60"
},
"firefox_android": "mirror",
"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."
}
],
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "10.1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"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/multipage/ecmascript-language-scripts-and-modules.html#sec-exports",
"support": {
"chrome": {
"version_added": "72"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": "mirror",
"firefox": {
"version_added": "80"
},
"firefox_android": "mirror",
"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."
}
],
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "14.1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-for-statement",
"support": {
"chrome": {
"version_added": "1"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "3"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "3"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-for-in-and-for-of-statements",
"support": {
"chrome": {
"version_added": "63"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": "mirror",
"firefox": {
"version_added": "57"
},
"firefox_android": "mirror",
"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"
}
]
}
],
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "11"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-for-in-and-for-of-statements",
"support": {
"chrome": {
"version_added": "1"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "3"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "2"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"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/multipage/ecmascript-language-statements-and-declarations.html#sec-for-in-and-for-of-statements",
"support": {
"chrome": {
"version_added": "38"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "13",
"notes": "Before 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": "mirror",
"ie": {
"version_added": false
},
"nodejs": {
"version_added": "0.12.0"
},
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "7"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
},
"async_iterators": {
"__compat": {
"description": "async iterators",
"support": {
"chrome": {
"version_added": "63"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "57"
},
"firefox_android": "mirror",
"ie": {
"version_added": false
},
"nodejs": {
"version_added": "10.0.0"
},
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "7"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
}
},
"closing_iterators": {
"__compat": {
"description": "Closing iterators",
"support": {
"chrome": {
"version_added": "51"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "14"
},
"firefox": {
"version_added": "53"
},
"firefox_android": "mirror",
"ie": {
"version_added": false
},
"nodejs": {
"version_added": "6.5.0"
},
"oculus": "mirror",
"opera": "mirror",
"opera_android": "mirror",
"safari": {
"version_added": "7"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
}
}
},
"function": {
"__compat": {
"description": "<code>function</code> statement",
"mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function",
"spec_url": "https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-classes.html#sec-function-definitions",
"support": {
"chrome": {
"version_added": "1"
},
"chrome_android": "mirror",
"deno": {
"version_added": "1.0"
},
"edge": {
"version_added": "12"
},
"firefox": {
"version_added": "1"
},
"firefox_android": "mirror",
"ie": {
"version_added": "3"
},
"nodejs": {
"version_added": "0.10.0"
},
"oculus": "mirror",
"opera": {
"version_added": "3"
},
"opera_android": {
"version_added": "10.1"
},
"safari": {
"version_added": "1"
},
"safari_ios": "mirror",
"samsunginternet_android": "mirror",
"webview_android": "mirror"
},
"status": {
"experimental": false,
"standard_track": true,
"deprecated": false
}
},
"trailing_comma_in_parameters": {
"__compat": {
"description": "Trailing comma in parameters",
"support": {
"chrome": {
"version_added": "58"
},