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Summary
| Pages | No tags | Needs* tags | Missing tags | Editorial reviews | Technical reviews | Outdated pages | Dev-doc-needed bugs | Documentation requests |
|---|---|---|---|---|---|---|---|---|
| 873 | 1 (1%) | 2 (1%) | 2 (1%) | 96 (11%) | 97 (12%) | 351 (41%) | 0 (0%) | 78 (9%) |
See also localization status of this section.
No tags
Found 1 pages. Learn more about how to tag pages.
Needs* tags
Found 2 pages. Learn more about how to deal with meta-tags.
- NeedsCompatTable
- NeedsContent
Missing tags
At least missing one of the following: JavaScript
Found 2 pages. Learn more about how to tag pages.
Editorial reviews
Found 96 pages. Learn more about how to do an editorial review.
- Equality comparisons and sameness
- Introduction to using XPath in JavaScript
- Functions
- Iterators and generators
- Keyed collections
- Numbers and dates
- Regular Expressions
- Using promises
- JavaScript language resources
- Assignment operators
- Destructuring assignment
- Grouping operator
- Logical operators
- Object initializer
- delete operator
- function expression
- Rest parameters
- getter
- TypeError: "x" is read-only
- TypeError: can't access property "x" of "y"
- Array
- Array.prototype.concat()
- Array.prototype.copyWithin()
- Array.prototype.entries()
- Array.prototype.every()
- Array.prototype.find()
- Array.prototype.findIndex()
- Array.prototype.flat()
- Array.prototype.flatMap()
- Array.prototype.includes()
- Array.prototype.indexOf()
- Array.prototype.reduce()
- Array.prototype.some()
- Array.prototype.sort()
- BigInt.prototype
- DataView
- Date.prototype.setHours()
- Date.prototype.toString()
- Date.prototype.toUTCString()
- Error
- Function
- Function.prototype.call()
- Generator
- Intl.ListFormat
- Intl.ListFormat.prototype
- Intl.ListFormat.supportedLocalesOf()
- Map
- Math.hypot()
- Math.round()
- Object.create()
- Object.prototype.constructor
- Promise.resolve()
- handler.apply()
- RegExp
- Set.prototype.values()
- String.prototype.concat()
- WeakMap
- WebAssembly.Global
- WebAssembly.Global.prototype
- Statements and declarations
- break
- for...in
- for...of
- function*
- import.meta
- Strict mode
- Template literals (Template strings)
- JavaScript shells
- Memory Management
- Microsoft JavaScript extensions
- @cc_on
- @if
- @set
- Date.getVarDate()
- Debug
- Debug.debuggerEnabled
- Debug.msTraceAsyncCallbackCompleted
- Debug.msTraceAsyncCallbackCompleted
- Debug.msTraceAsyncCallbackStarting
- Debug.msTraceAsyncOperationStarting
- Debug.msUpdateAsyncCallbackRelation
- Debug.setNonUserCodeExceptions
- Debug.write
- Enumerator
- Enumerator.atEnd
- Enumerator.item
- Enumerator.moveFirst
- Enumerator.moveNext
- Error.description
- Error.number
- Error.stackTraceLimit
- ScriptEngine()
- ScriptEngineBuildVersion
- ScriptEngineMajorVersion
- ScriptEngineMinorVersion
- New in JavaScript
Technical reviews
Found 97 pages. Learn more about how to do a technical review.
- A re-introduction to JavaScript (JS tutorial)
- Concurrency model and Event Loop
- Enumerability and ownership of properties
- Details of the object model
- Grammar and types
- Regular Expressions
- extends
- Spread syntax
- delete operator
- instanceof
- new operator
- void operator
- Functions
- getter
- Iteration protocols
- ReferenceError: "x" is not defined
- ReferenceError: reference to undefined property "x"
- SyntaxError: Unexpected token
- TypeError: "x" is (not) "y"
- TypeError: can't access property "x" of "y"
- Array.from()
- Array.isArray()
- Array.prototype.concat()
- Array.prototype.flat()
- Array.prototype.flatMap()
- Array.prototype.includes()
- BigInt.prototype
- DataView
- Date.parse()
- Function
- Generator
- Generator.prototype.next()
- Intl.ListFormat
- Intl.ListFormat.prototype
- Intl.ListFormat.supportedLocalesOf()
- Intl.NumberFormat
- Map.prototype
- Map.prototype[@@iterator]()
- Math.fround()
- Math.round()
- Math.sqrt()
- Object.create()
- Object.getOwnPropertyDescriptor()
- Object.getOwnPropertyDescriptors()
- Object.keys()
- Object.prototype.hasOwnProperty()
- Promise.all()
- Promise.prototype.finally()
- Promise.reject()
- Promise.resolve()
- RegExp
- RegExp.prototype.exec()
- String.prototype.concat()
- String.prototype.endsWith()
- String.prototype.localeCompare()
- String.prototype.repeat()
- String.prototype.split()
- String.prototype.startsWith()
- String.prototype.substr()
- TypedArray.prototype.slice()
- WebAssembly.Global
- WebAssembly.Global.prototype
- parseInt()
- async function
- break
- function*
- import
- Strict mode
- Microsoft JavaScript extensions
- @cc_on
- @if
- @set
- ActiveXObject
- Date.getVarDate()
- Debug
- Debug.debuggerEnabled
- Debug.msTraceAsyncCallbackCompleted
- Debug.msTraceAsyncCallbackCompleted
- Debug.msTraceAsyncCallbackStarting
- Debug.msTraceAsyncOperationStarting
- Debug.msUpdateAsyncCallbackRelation
- Debug.write
- Debug.writeln
- Enumerator
- Enumerator.atEnd
- Enumerator.item
- Enumerator.moveFirst
- Enumerator.moveNext
- Error.description
- Error.number
- Error.stackTraceLimit
- ScriptEngine()
- ScriptEngineBuildVersion
- ScriptEngineMajorVersion
- ScriptEngineMinorVersion
- ECMAScript Next support in Mozilla
- New in JavaScript 1.8.1
Outdated pages
Found 351 pages. These pages haven't been updated in over a year. Outdated pages can have problems with both content and format. Look at these pages and consider: Is this page talking about the Web of today? Does it look consistent with newer pages in this topic area? If not, make any needed changes.
- Differential inheritance in JavaScript
856 days old - Index
821 days old - Introduction to using XPath in JavaScript
372 days old - The legacy Iterator protocol
439 days old - class expression
374 days old - new.target
374 days old - Method definitions
375 days old - arguments.callee
410 days old - arguments.caller
473 days old - arguments.length
473 days old - arguments[@@iterator]()
473 days old - setter
374 days old - JavaScript error reference
779 days old - ReferenceError: assignment to undeclared variable "x"
644 days old - ReferenceError: invalid assignment left-hand side
963 days old - SyntaxError: missing ] after element list
713 days old - SyntaxError: missing formal parameter
637 days old - SyntaxError: missing name after . operator
661 days old - TypeError: can't access dead object
656 days old - TypeError: can't delete non-configurable array element
577 days old - TypeError: invalid arguments
674 days old - TypeError: variable "x" redeclares argument
713 days old - Warning: -file- is being assigned a //# sourceMappingURL, but already has one
966 days old - Warning: 08/09 is not a legal ECMA-262 octal constant
677 days old - Warning: Date.prototype.toLocaleFormat is deprecated
439 days old - Warning: JavaScript 1.6's for-each-in loops are deprecated
677 days old - Warning: String.x is deprecated; use String.prototype.x instead
681 days old - Warning: expression closures are deprecated
678 days old - Warning: unreachable code after return statement
978 days old - JavaScript properties index
1080 days old - Array.of()
499 days old - Array.prototype.pop()
374 days old - Array.prototype[@@unscopables]
499 days old - Array.unobserve()
499 days old - get Array[@@species]
442 days old - ArrayBuffer
374 days old - ArrayBuffer.isView()
374 days old - ArrayBuffer.prototype
481 days old - ArrayBuffer.prototype.byteLength
374 days old - ArrayBuffer.prototype.slice()
374 days old - get ArrayBuffer[@@species]
481 days old - AsyncFunction.prototype
481 days old - Atomics.add()
374 days old - Atomics.and()
374 days old - Atomics.compareExchange()
374 days old - Atomics.exchange()
374 days old - Atomics.isLockFree()
374 days old - Atomics.load()
374 days old - Atomics.or()
374 days old - Atomics.sub()
374 days old - Atomics.xor()
374 days old - Boolean.prototype.toSource()
443 days old - Boolean.prototype.toString()
375 days old - Boolean.prototype.valueOf()
375 days old - DataView.prototype
481 days old - DataView.prototype.buffer
374 days old - DataView.prototype.byteLength
374 days old - DataView.prototype.byteOffset
374 days old - DataView.prototype.getFloat32()
374 days old - DataView.prototype.getFloat64()
374 days old - DataView.prototype.getInt16()
374 days old - DataView.prototype.getInt32()
374 days old - DataView.prototype.getInt8()
374 days old - DataView.prototype.getUint16()
374 days old - DataView.prototype.getUint32()
374 days old - DataView.prototype.getUint8()
374 days old - DataView.prototype.setFloat32()
374 days old - DataView.prototype.setFloat64()
374 days old - DataView.prototype.setInt16()
374 days old - DataView.prototype.setInt32()
374 days old - DataView.prototype.setInt8()
374 days old - DataView.prototype.setUint16()
374 days old - DataView.prototype.setUint32()
374 days old - DataView.prototype.setUint8()
374 days old - Date.parse()
374 days old - Date.prototype.getFullYear()
375 days old - Date.prototype.getHours()
374 days old - Date.prototype.getMilliseconds()
375 days old - Date.prototype.getMinutes()
376 days old - Date.prototype.getSeconds()
374 days old - Date.prototype.getUTCDate()
376 days old - Date.prototype.getUTCDay()
374 days old - Date.prototype.getUTCFullYear()
374 days old - Date.prototype.getUTCHours()
375 days old - Date.prototype.getUTCMonth()
374 days old - Date.prototype.getYear()
504 days old - Date.prototype.setHours()
374 days old - Date.prototype.setMilliseconds()
375 days old - Date.prototype.setMinutes()
374 days old - Date.prototype.setMonth()
376 days old - Date.prototype.setSeconds()
374 days old - Date.prototype.setTime()
375 days old - Date.prototype.setUTCDate()
366 days old - Date.prototype.setUTCFullYear()
374 days old - Date.prototype.setUTCHours()
375 days old - Date.prototype.setUTCMonth()
375 days old - Date.prototype.setYear()
576 days old - Date.prototype.toDateString()
366 days old - Date.prototype.toISOString()
375 days old - Date.prototype.toJSON()
374 days old - Date.prototype.toLocaleFormat()
439 days old - Date.prototype.toLocaleString()
366 days old - Date.prototype.valueOf()
376 days old - Error.prototype
488 days old - Error.prototype.columnNumber
366 days old - Error.prototype.fileName
366 days old - Error.prototype.lineNumber
366 days old - Error.prototype.message
488 days old - Error.prototype.stack
366 days old - Error.prototype.toSource()
366 days old - Error.prototype.toString()
488 days old - EvalError.prototype
488 days old - Float32Array
481 days old - Float64Array
481 days old - Function.arity
481 days old - Function.prototype.isGenerator()
439 days old - Generator.prototype.throw()
481 days old - GeneratorFunction.prototype
481 days old - Int16Array
481 days old - Int32Array
481 days old - Int8Array
481 days old - InternalError
488 days old - InternalError.prototype
488 days old - Intl.getCanonicalLocales()
374 days old - Intl.Collator
374 days old - Intl.Collator.prototype
481 days old - Intl.Collator.prototype.resolvedOptions()
374 days old - Intl.Collator.supportedLocalesOf()
374 days old - Intl.DateTimeFormat.prototype
481 days old - Intl.DateTimeFormat.prototype.format
374 days old - Intl.DateTimeFormat.prototype.formatToParts()
409 days old - Intl.DateTimeFormat.prototype.resolvedOptions()
374 days old - Intl.DateTimeFormat.supportedLocalesOf()
374 days old - Intl.NumberFormat.prototype
418 days old - Intl.NumberFormat.prototype.format
374 days old - Intl.NumberFormat.prototype.resolvedOptions()
374 days old - Intl.NumberFormat.supportedLocalesOf()
374 days old - Intl.PluralRules.select()
415 days old - JSON.parse()
375 days old - Map.prototype
457 days old - Map.prototype.clear()
374 days old - Map.prototype.forEach()
374 days old - Map.prototype.get()
374 days old - Map.prototype.has()
374 days old - Map.prototype.size
374 days old - Map.prototype.values()
374 days old - Map.prototype[@@toStringTag]
374 days old - get Map[@@species]
473 days old - Math.E
375 days old - Math.LN10
375 days old - Math.LN2
374 days old - Math.LOG10E
375 days old - Math.LOG2E
375 days old - Math.PI
375 days old - Math.SQRT1_2
375 days old - Math.SQRT2
375 days old - Math.acos()
375 days old - Math.asin()
375 days old - Math.atan()
374 days old - Math.cos()
375 days old - Math.cosh()
375 days old - Math.exp()
375 days old - Math.expm1()
375 days old - Math.log()
375 days old - Math.log10()
375 days old - Math.log1p()
375 days old - Math.log2()
375 days old - Math.max()
375 days old - Math.min()
375 days old - Math.pow()
366 days old - Math.sign()
375 days old - Math.sin()
375 days old - Math.sinh()
375 days old - Math.sqrt()
375 days old - Math.tan()
375 days old - Math.tanh()
379 days old - Math.trunc()
375 days old - Number.MIN_SAFE_INTEGER
375 days old - Number.MIN_VALUE
375 days old - Number.NEGATIVE_INFINITY
375 days old - Number.NaN
379 days old - Number.POSITIVE_INFINITY
375 days old - Number.isInteger()
375 days old - Number.prototype
572 days old - Number.prototype.toExponential()
375 days old - Number.prototype.toPrecision()
379 days old - Number.prototype.toSource()
572 days old - Number.prototype.valueOf()
375 days old - Additional examples for Object.defineProperty
536 days old - Object.getNotifier()
488 days old - Object.getOwnPropertySymbols()
375 days old - Object.isExtensible()
375 days old - Object.isFrozen()
375 days old - Object.isSealed()
375 days old - Object.observe()
488 days old - Object.prototype.__defineGetter__()
488 days old - Object.prototype.__defineSetter__()
488 days old - Object.prototype.__lookupGetter__()
488 days old - Object.prototype.__lookupSetter__()
488 days old - Object.prototype.eval()
488 days old - Object.prototype.isPrototypeOf()
375 days old - Object.prototype.propertyIsEnumerable()
375 days old - Object.prototype.toSource()
443 days old - Object.prototype.toString()
374 days old - Object.prototype.unwatch()
439 days old - Object.prototype.watch()
439 days old - Object.unobserve()
488 days old - Promise.prototype
451 days old - Proxy handler
473 days old - Proxy.revocable()
473 days old - RangeError.prototype
488 days old - ReferenceError.prototype
488 days old - Reflect.apply()
374 days old - Reflect.defineProperty()
374 days old - Reflect.enumerate()
473 days old - Reflect.getOwnPropertyDescriptor()
374 days old - Reflect.has()
374 days old - Reflect.ownKeys()
374 days old - Reflect.preventExtensions()
374 days old - Reflect.set()
374 days old - Reflect.setPrototypeOf()
373 days old - RegExp.input ($_)
481 days old - RegExp.lastMatch ($&)
481 days old - RegExp.lastParen ($+)
481 days old - RegExp.leftContext ($`)
481 days old - RegExp.prototype.compile()
481 days old - RegExp.prototype.flags
375 days old - RegExp.prototype.global
374 days old - RegExp.prototype.ignoreCase
374 days old - RegExp.prototype.source
374 days old - RegExp.prototype.sticky
374 days old - RegExp.prototype.toSource()
481 days old - RegExp.prototype[@@match]()
375 days old - RegExp.prototype[@@replace]()
374 days old - RegExp.prototype[@@search]()
375 days old - RegExp.prototype[@@split]()
374 days old - RegExp.rightContext ($')
481 days old - get RegExp[@@species]
374 days old - Set.prototype
473 days old - Set.prototype.add()
374 days old - Set.prototype.clear()
374 days old - Set.prototype.delete()
374 days old - Set.prototype.entries()
374 days old - Set.prototype.size
374 days old - get Set[@@species]
473 days old - SharedArrayBuffer.prototype
481 days old - SharedArrayBuffer.prototype.byteLength
374 days old - SharedArrayBuffer.prototype.slice()
374 days old - String.prototype.anchor()
545 days old - String.prototype.big()
571 days old - String.prototype.blink()
571 days old - String.prototype.bold()
571 days old - String.prototype.fixed()
571 days old - String.prototype.fontcolor()
571 days old - String.prototype.fontsize()
571 days old - String.prototype.italics()
531 days old - String.prototype.link()
571 days old - String.prototype.quote()
545 days old - String.prototype.small()
571 days old - String.prototype.strike()
571 days old - String.prototype.sub()
571 days old - String.prototype.sup()
571 days old - Symbol.for()
374 days old - Symbol.hasInstance
374 days old - Symbol.isConcatSpreadable
374 days old - Symbol.keyFor()
374 days old - Symbol.match
374 days old - Symbol.prototype.toString()
374 days old - Symbol.prototype.valueOf()
473 days old - Symbol.prototype[@@toPrimitive]
473 days old - Symbol.replace
374 days old - Symbol.search
374 days old - Symbol.species
374 days old - Symbol.split
374 days old - Symbol.toPrimitive
374 days old - Symbol.toStringTag
374 days old - Symbol.unscopables
374 days old - SyntaxError.prototype
488 days old - TypeError
488 days old - TypeError.prototype
488 days old - TypedArray.BYTES_PER_ELEMENT
374 days old - TypedArray.from()
481 days old - TypedArray.name
374 days old - TypedArray.of()
481 days old - TypedArray.prototype.buffer
374 days old - TypedArray.prototype.byteLength
374 days old - TypedArray.prototype.byteOffset
481 days old - TypedArray.prototype.copyWithin()
374 days old - TypedArray.prototype.entries()
374 days old - TypedArray.prototype.every()
374 days old - TypedArray.prototype.fill()
374 days old - TypedArray.prototype.filter()
374 days old - TypedArray.prototype.find()
374 days old - TypedArray.prototype.findIndex()
374 days old - TypedArray.prototype.forEach()
481 days old - TypedArray.prototype.includes()
374 days old - TypedArray.prototype.indexOf()
374 days old - TypedArray.prototype.join()
374 days old - TypedArray.prototype.keys()
374 days old - TypedArray.prototype.lastIndexOf()
374 days old - TypedArray.prototype.length
374 days old - TypedArray.prototype.map()
374 days old - TypedArray.prototype.reduce()
374 days old - TypedArray.prototype.reduceRight()
481 days old - TypedArray.prototype.reverse()
374 days old - TypedArray.prototype.some()
374 days old - TypedArray.prototype.toLocaleString()
481 days old - TypedArray.prototype.toString()
374 days old - TypedArray.prototype.values()
374 days old - TypedArray.prototype[@@iterator]()
481 days old - get TypedArray[@@species]
481 days old - URIError
488 days old - URIError.prototype
488 days old - Uint16Array
481 days old - Uint32Array
481 days old - Uint8Array
481 days old - Uint8ClampedArray
481 days old - WeakMap.prototype
473 days old - WeakMap.prototype.delete()
374 days old - WeakMap.prototype.get()
374 days old - WeakMap.prototype.has()
374 days old - WeakSet.prototype
473 days old - WeakSet.prototype.clear()
473 days old - WeakSet.prototype.delete()
374 days old - WeakSet.prototype.has()
374 days old - WebAssembly.Instance.prototype
488 days old - WebAssembly.Memory.prototype
488 days old - WebAssembly.Table.prototype
488 days old - decodeURIComponent()
375 days old - encodeURIComponent()
375 days old - null
375 days old - class
374 days old - debugger
473 days old - empty
374 days old - for each...in
473 days old - while
374 days old - Transitioning to strict mode
713 days old - New in JavaScript
388 days old - ECMAScript 5 support in Mozilla
741 days old - Firefox JavaScript changelog
411 days old - New in JavaScript 1.1
1096 days old - New in JavaScript 1.2
1096 days old - New in JavaScript 1.3
1096 days old - New in JavaScript 1.4
1096 days old - New in JavaScript 1.5
432 days old - New in JavaScript 1.6
1020 days old - New in JavaScript 1.7
670 days old - New in JavaScript 1.8
1096 days old - New in JavaScript 1.8.1
482 days old - New in JavaScript 1.8.5
445 days old - The performance hazards of [[Prototype]] mutation
1007 days old
Documentation requests
Found 78 bugs. Documentation request bugs can contain various kinds work related to MDN pages. Read through the bug and ask questions in the bug if in doubt.
| Bug | Summary |
|---|---|
| 1179881 | Write a JS error reference |
| 1201380 | Examples and text don't match up in "details of the object model" page |
| 1204224 | Unclear explanation in "Working With Objects" tutorial |
| 1238394 | Improve Regex docs for capturing groups |
| 1243496 | The function declaration and function expression documentation is incorrect |
| 1245977 | MathML fallback: square root is not displayed correctly |
| 1275816 | Explain how |this| value is calculated in call expression, and the difference between `foo[prop]()` and `func = foo[prop], func()` |
| 1281696 | iterating with let in for-loops |
| 1294338 | charCodeAt and codePointAt in String documentation seem almost backwards |
| 1301501 | polyfill uses != to check typeof assign to "function" vs !== |
| 1303603 | Clarify that RegExp.prototype.exec() returns a special array |
| 1305261 | Async Functions/Await Documentation |
| 1307755 | Given for..of example needs some explanation, not self-explaining |
| 1309784 | Add Cyclomatic Complexity |
| 1318620 | Slightly misleading example |
| 1318933 | Description of `Object.keys` outdated because it does not return symbol keys |
| 1322844 | Tagged template literals example does not illustrate point being made |
| 1324194 | Incorrect description for example summary found on array.prototype.filter() page (JSON example) |
| 1325251 | The Math.sign() polyfill contains two type conversions |
| 1334000 | Polyfill example does not detect NaN |
| 1343142 | Clarify that Array.prototype.sort() sorts in increasing order |
| 1346500 | The result of the polyfill doesn't meet the result of firefox. |
| 1347496 | Inaccurate information in a code snippet |
| 1357343 | Console.table example does not work as expected |
| 1359860 | Make /W special character regex more clear |
| 1360102 | About the global property with "var" in MDN. |
| 1360661 | Document for Array.from provides a polyfill that cannot create array from a Set |
| 1361299 | mixin replace jQuery.extend with Object.assign |
| 1363684 | tip faster js offsetwith |
| 1365288 | Map.get/set documentation is lacking information |
| 1367757 | Should String.prototype.substr be marked as deprecated? |
| 1371716 | Syntax example provided is incomplete / incorrect |
| 1372019 | Filter the javascript docs on ES version support |
| 1372390 | Promise.all returns already-resolved promises for any combination of non-promises and resolved promises. |
| 1374016 | A consistency issue: different parts of MDN have links where in other parts they're buttons |
| 1376223 | "Promise" Advance Example CodePen Has a Bug |
| 1385876 | Threading coverage on MDN |
| 1389206 | I would like to contribue to progrssive apps section by adding a new sub-article about how to build progressive apps with Angular 2+ |
| 1394123 | Property Accessors: No mention of what happens when a property is not present on an object |
| 1394569 | Array.prototype.filter polyfill compares result of typeof operator to "Function" instead of "function" |
| 1395257 | JS sidebar macros don't interact well with A/B testing framework |
| 1398923 | Migrate static sample code in /samples/domref/dispatch.html to be "live" |
| 1401192 | List support for proper stacktrace in the compat table. |
| 1401753 | Promise, advanced example, code comment incorrect |
| 1405611 | Create a page on property descriptors and flags |
| 1408616 | Re-Introduction to JavaScript - Functions: hiding local variables |
| 1408621 | Re-Introduction to JavaScript - Functions: confusing use of fullName(); |
| 1408998 | More examples in Array.prototype.reduce |
| 1411233 | Document XMLHttpRequestEventTarget.ontimeout |
| 1412101 | Discussion of "boolean operator" should be clarified or deleted |
| 1414088 | Glossary entry for Symbol too detailed; move it into the JavaScript Guide, which doesn't say much |
| 1415201 | Update documentation for missing semicolon. |
| 1419710 | Array.prototype.sort confusing |
| 1424040 | Add glossary entries for weak and strong references; update WeakMap and WeakSet docs to link to them |
| 1443030 | The expression "execution context" is misleading. |
| 1444255 | Boolean（）中代码运行结果与案例提示不同 |
| 1445988 | Note for IE and Edge including control characters in Intl.DateTimeFormat.format |
| 1447921 | Indexed collections Array class doesn't have static method forEach. prototype does |
| 1456933 | add error page for "allocation size overflow" |
| 1472714 | JS Guide: Asynchronous programming |
| 1474403 | Define "static function" in the Glossary |
| 1475570 | Inaccurate warnings related to setting/getting [[Prototype]] |
| 1476207 | I've written a cheat sheet for Javascript with active links toMDN pages |
| 1476511 | The sourceopen event (MediaSource API) is not documented |
| 1476965 | Document BigInt |
| 1480988 | The syntax explanation for Date.parse doesn't match to the spec |
| 1483152 | Document async iterators and generators |
| 1484772 | MDN: Promise.all() : Information about sync/a-sync resolution possibly irrelevant |
| 1486007 | Add section "Difference between substring() and slice()" |
| 1487930 | Language Feedback directly in Mozilla |
| 1494076 | In page "Función async" redirection for AsyncFunction documentation (spanish page) ends up in 404 |
| 1494936 | Permissions.query browser compatibility table |
| 1500472 | Template literals: formatting output? |
| 1500851 | resetParas 不一致 |
| 1503571 | Description of parseFloat incorrect |
| 1508982 | Create page: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RelativeTimeFormat |
| 1514877 | Request for clarity around target mutation |
| 1517997 | RegExp non-greedy quantifiers don't match the smallest possible match |
Browse as bug list.
Localizations
Please help us to localize this documentation into different languages. Read more about how to translate.
| Language | Pages | Translated | Translations up to date |
|---|---|---|---|
| af | 873 | 4 (0%) | 0 (0%) |
| bn-BD | 873 | 36 (4%) | 3 (8%) |
| ca | 873 | 318 (36%) | 45 (14%) |
| de | 873 | 578 (66%) | 270 (46%) |
| es | 873 | 461 (52%) | 106 (22%) |
| fa | 873 | 28 (3%) | 3 (10%) |
| fr | 873 | 872 (99%) | 860 (98%) |
| id | 873 | 117 (13%) | 10 (8%) |
| it | 873 | 179 (20%) | 34 (18%) |
| ja | 873 | 814 (93%) | 306 (37%) |
| kab | 873 | 2 (0%) | 0 (0%) |
| ko | 873 | 484 (55%) | 168 (34%) |
| nl | 873 | 70 (8%) | 7 (10%) |
| pl | 873 | 324 (37%) | 33 (10%) |
| pt-BR | 873 | 421 (48%) | 83 (19%) |
| pt-PT | 873 | 71 (8%) | 11 (15%) |
| ro | 873 | 36 (4%) | 2 (5%) |
| ru | 873 | 620 (71%) | 133 (21%) |
| uk | 873 | 189 (21%) | 55 (29%) |
| vi | 873 | 97 (11%) | 25 (25%) |
| zh-CN | 873 | 788 (90%) | 283 (35%) |
Structure of the MDN JavaScript docs
| # | Chapter | Pages | Priority | Notes |
|---|---|---|---|---|
| 0 | Value & function properties in the global scope | 16 | 1 | Complete. |
| 1 | Object | 40 | 1 |
Complete. |
| 2 | Function | 14 | 1 | Complete. |
| 3 | Array | 38 | 1 | Complete. |
| 4 | String | 50 | 1 | Complete. |
| 5 | Boolean | 5 | 1 | Complete. |
| 6 | Number | 24 | 1 |
Complete. |
| 7 | Math | 44 | 1 | Complete. |
| 8 | Date | 53 | 1 | Complete. |
| 9 | RegExp | 21 | 1 | Complete. |
| 10 |
Error |
24 | 4 | Complete. |
| 11 | JSON | 3 | 1 | Complete. |
| 12 | Intl Intl.Collator Intl.DateTimeFormat Intl.NumberFormat |
16 | 2 | Complete. |
| 13 | Map | 13 | 2 | Complete. |
| 14 | WeakMap | 7 | 2 | Complete. |
| 15 | Set | 11 | 2 | Complete. |
| 16 | WeakSet | 6 | 2 | Complete. |
| 17 | Proxy | 17 | 3 | Complete. |
| 18 | Reflect | 15 | 3 | Complete. |
| 19 | Generator (legacy and ES2015) Iterator StopIteration GeneratorFunction |
8 | 2 | Complete. |
| 20 | ArrayBuffer (6)DataView (21)TypedArray (34 [+ 3])Float32ArrayFloat64ArrayInt16ArrayInt32ArrayInt8ArrayUint16ArrayUint32ArrayUint8ArrayUint8ClampedArray |
73 | 2 | Missing pages:
|
| 21 | Promise | 8 | 1 | Complete. |
| 22 | Symbol | 9 | 2 |
Missing pages:
|
| 23 | ParallelArray | 1 | 5 | Complete. |
| 24 | Atomics SharedArrayBuffer |
17 | 4 | Preffed off. Spec in flux. |
| 25 | Expressions & Operators | 29 | 1 | Complete. |
| 26 | Statements & Declarations | 27 | 1 | Complete. |
| 27 | Functions | 11 | 1 |
Complete. |
| 28 | Classes | 4 | 1 | Complete. |
| 29 | JavaScript Guide | 15 | 1 |
|
| 30 | New in JavaScript | 15 | 4 |
Complete. |
| 31 | JavaScript error reference | 36 | 3 | Explains error messages (v8, Chakra). So those people searching for errors will find guidance. |
| 32 | Articles/Tutorials/Misc | 17 |
3 |
|
| 33 | Meta pages | 9 | 4 |
Other tasks to do
- Go through Firefox release notes for developers and site compat notes and make sure JS changes are documented properly in the references.
- Make sure our compat tables are up to date by also going through bug trackers of other open source browsers (e.g. WebKit, Blink)
- Write a changelog for Chrome JavaScript releases like we have for Firefox. Same for other browsers/node.js?
- Meta article about how to document in the JS MDN area.
- Write more JavaScript error documentation: The list of errors which have no mdn pages link corresponds to SpiderMonkey error code which are reported to the devtool console which do not have any corresponding MDN pages.
Tagging standard
- Pages in the JavaScript/ page tree should at least have the tag "JavaScript".
- For methods belonging to an object, the name of the Object should be added (e.g.
String.fromCharCodeshould have "String"). - Methods should have "Method" and properties need a "Property" tag. All prototype members have the "prototype" tag.
- Features added in a new ECMAScript version have the tags "ECMAScript6" and "ECMAScript 2015" or later versions/years.
- The Experimental tag should only be used with new features where the standard in not yet finalized (e.g. in a strawman proposal) and the feature is in a Nightly version or behind a preference.
- Features are Deprecated if their usage is discouraged and are Obsolete if they have been removed from engines.
- If pages need any type of work, a "Needs*" tag should be added (see above).
Specifications
The following specifications are taken under consideration for this project:
| Specification | Status |
|---|---|
| ECMAScript 1st Edition (ECMA-262) | Standard |
| ECMAScript 3rd Edition (ECMA-262) | Standard |
| ECMAScript 5.1 (ECMA-262) | Standard |
| ECMAScript 2015 (6th Edition, ECMA-262) | Standard |
| ECMAScript 2016 (ECMA-262) | Standard |
| ECMAScript 2017 (ECMA-262) | Standard |
| ECMAScript 2018 (ECMA-262) | Standard |
| ECMAScript Latest Draft (ECMA-262) | Draft |
| ECMAScript Internationalization API 1.0 (ECMA-402) | Standard |
| ECMAScript Internationalization API 2.0 (ECMA-402) | Standard |
| ECMAScript Internationalization API 4.0 (ECMA-402) | Draft |
| ECMAScript Proposals (with advanced stage and at least 1 implementation) | Draft |
Help the 'JavaScript' documentation project…
Topic driver : Florian Scholz (IRC nickname: fscholz)
Look at the current status of the 'JavaScript' documentation.
Don't hesitate to contact us on #mdn or on the MDN discourse group/list:
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