该部分是 Javascript 的资料库。阅读关于该参考了解更多。
全局对象
语句
本章介绍所有的 JavaScript 语句和声明。
表达式和操作符
本章介绍所有的 JavaScript 表达式和操作符。
函数
本章介绍如何使用 JavaScript函数 来开发应用程序。
JavaScript 参考文档
相关主题
- JavaScript
- 教程:
-
JavaScript 指南
- Introduction
- Grammar and types
- Control flow and error handling
- Loops and iteration
- Functions
- Expressions and operators
- Numbers and dates
- Text formatting
- Regular expressions
- Indexed collections
- Keyed collections
- Working with objects
- Details of the object model
- Using promises
- Iterators and generators
- Meta programming
- 引用:
-
内置对象
- Array
- ArrayBuffer
- AsyncFunction
- Atomics
- BigInt
- Boolean
- DataView
- Date
- Error
- EvalError
- Float32Array
- Float64Array
- Function
- Generator
- GeneratorFunction
- Infinity
- Int16Array
- Int32Array
- Int8Array
- InternalError
- Intl
- Intl.Collator
- Intl.DateTimeFormat
- Intl.ListFormat [我来译!]
- Intl.NumberFormat
- Intl.PluralRules
- Intl.RelativeTimeFormat [我来译!]
- JSON
- Map
- Math
- NaN
- Number
- Object
- Promise
- Proxy
- RangeError
- ReferenceError
- Reflect
- RegExp
- Set
- SharedArrayBuffer
- String
- Symbol
- SyntaxError
- TypeError
- TypedArray
- URIError
- Uint16Array
- Uint32Array
- Uint8Array
- Uint8ClampedArray
- WeakMap
- WeakSet
- WebAssembly
- decodeURI()
- decodeURIComponent()
- encodeURI()
- encodeURIComponent()
- escape()
- eval()
- globalThis [我来译!]
- isFinite()
- isNaN()
- null
- parseFloat
- parseInt
- undefined
- unescape()
- uneval()
-
Errors
- Error: Permission denied to access property "x"
- InternalError: too much recursion
- RangeError: argument is not a valid code point
- RangeError: invalid array length
- RangeError: invalid date
- RangeError: precision is out of range
- RangeError: radix must be an integer
- RangeError: repeat count must be less than infinity
- RangeError: repeat count must be non-negative
- ReferenceError: "x" is not defined
- ReferenceError: assignment to undeclared variable "x"
- ReferenceError: can't access lexical declaration`X' before initialization
- ReferenceError: deprecated caller or arguments usage
- ReferenceError: invalid assignment left-hand side
- ReferenceError: reference to undefined property "x"
- SyntaxError: "0"-prefixed octal literals and octal escape seq. are deprecated
- SyntaxError: "use strict" not allowed in function with non-simple parameters
- SyntaxError: "x" is a reserved identifier
- SyntaxError: JSON.parse: bad parsing
- SyntaxError: Malformed formal parameter
- SyntaxError: Unexpected token
- SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
- SyntaxError: a declaration in the head of a for-of loop can't have an initializer
- SyntaxError: applying the 'delete' operator to an unqualified name is deprecated
- SyntaxError: for-in loop head declarations may not have initializers
- SyntaxError: function statement requires a name
- SyntaxError: identifier starts immediately after numeric literal
- SyntaxError: illegal character
- SyntaxError: invalid regular expression flag "x"
- SyntaxError: missing ) after argument list
- SyntaxError: missing ) after condition
- SyntaxError: missing : after property id
- SyntaxError: missing ; before statement
- SyntaxError: missing = in const declaration
- SyntaxError: missing ] after element list
- SyntaxError: missing formal parameter
- SyntaxError: missing name after . operator
- SyntaxError: missing variable name
- SyntaxError: missing } after function body
- SyntaxError: missing } after property list
- SyntaxError: redeclaration of formal parameter "x"
- SyntaxError: return not in function
- SyntaxError: test for equality (==) mistyped as assignment (=)?
- SyntaxError: unterminated string literal
- TypeError: "x" has no properties
- TypeError: "x" is (not) "y"
- TypeError: "x" is not a constructor
- TypeError: "x" is not a function
- TypeError: "x" is not a non-null object
- TypeError: "x" is read-only
- TypeError: 'x' is not iterable
- TypeError: More arguments needed
- 类型错误：在没有初始值的情况下简化空数组
- TypeError: can't access dead object
- TypeError: can't access property "x" of "y"
- TypeError: can't define property "x": "obj" is not extensible
- TypeError: can't delete non-configurable array element
- TypeError: can't redefine non-configurable property "x"
- TypeError: invalid 'in' operand "x"
- TypeError: cyclic object value
- TypeError: invalid 'instanceof' operand 'x'
- TypeError: invalid Array.prototype.sort argument
- TypeError: invalid arguments
- TypeError: invalid assignment to const "x"
- TypeError: property "x" is non-configurable and can't be deleted
- TypeError: setting getter-only property "x"
- TypeError: variable "x" redeclares argument
- URIError: malformed URI sequence
- Warning: -file- is being assigned a //# sourceMappingURL, but already has one
- SyntaxError: "x" is not a legal ECMA-262 octal constant
- Warning: Date.prototype.toLocaleFormat is deprecated
- Warning: JavaScript 1.6's for-each-in loops are deprecated
- Warning: String.x is deprecated; use String.prototype.x instead
- Warning: expression closures are deprecated
- Warning: unreachable code after return statement
- X.prototype.y called on incompatible type
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New in JavaScript
- Mozilla 对 ECMAScript 6 的支持
- ECMAScript 5 support in Mozilla
- Mozilla对下一代ECMAScript 的支持
- Firefox 中的 JavaScript 更新日志
- JavaScript 1.1的新特性
- JavaScript 1.2的新特性
- JavaScript 1.3的新特性
- JavaScript 1.4的新特性
- JavaScript 1.5 的新特性
- JavaScript 1.6 的新特性
- JavaScript 1.7 的新特性
- New in JavaScript 1.8
- JavaScript 1.8.1 的新特性
- JavaScript 1.8.5 的新特性
- 文档: