在此页

• 描述
• 构造函数
• 静态特性
• 静态方法
• 实例特性
• 实例方法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

JavaScript Array 类是用于构造数组的全局对象；它是高级、像列表的对象。

描述

Arrays are list-like objects whose prototype has methods to perform traversal and mutation operations. Neither the length of a JavaScript array nor the types of its elements are fixed. Since an array's length can change at any time, and data can be stored at non-contiguous locations in the array, JavaScript arrays are not guaranteed to be dense; this depends on how the programmer chooses to use them. In general, these are convenient characteristics; but if these features are not desirable for your particular use, you might consider using typed arrays.

Arrays cannot use strings as element indexes (as in an associative array ) but must use integers. Setting or accessing via non-integers using 括号表示法 (或 点表示法 ) will not set or retrieve an element from the array list itself, but will set or access a variable associated with that array's 对象特性集合 . The array's object properties and list of array elements are separate, and the array's traversal and mutation operations cannot be applied to these named properties.

常见操作

创建数组

let fruits = ['Apple', 'Banana']
console.log(fruits.length)
// 2
					

使用索引位置访问数组项

let first = fruits[0]
// Apple
let last = fruits[fruits.length - 1]
// Banana
					

循环数组

fruits.forEach(function(item, index, array) {
  console.log(item, index)
})
// Apple 0
// Banana 1
					

Add an item to the end of an Array

let newLength = fruits.push('Orange')
// ["Apple", "Banana", "Orange"]
					

Remove an item from the end of an Array

let last = fruits.pop() // remove Orange (from the end)
// ["Apple", "Banana"]
					

Remove an item from the beginning of an Array

let first = fruits.shift() // remove Apple from the front
// ["Banana"]
					

Add an item to the beginning of an Array

let newLength = fruits.unshift('Strawberry') // add to the front
// ["Strawberry", "Banana"]
					

在数组中查找项索引

fruits.push('Mango')
// ["Strawberry", "Banana", "Mango"]
let pos = fruits.indexOf('Banana')
// 1
					

按索引位置移除项

let removedItem = fruits.splice(pos, 1) // this is how to remove an item
// ["Strawberry", "Mango"]
					

Remove items from an index position

let vegetables = ['Cabbage', 'Turnip', 'Radish', 'Carrot']
console.log(vegetables)
// ["Cabbage", "Turnip", "Radish", "Carrot"]
let pos = 1
let n = 2
let removedItems = vegetables.splice(pos, n)
// this is how to remove items, n defines the number of items to be removed,
// starting at the index position specified by pos and progressing toward the end of array.
console.log(vegetables)
// ["Cabbage", "Carrot"] (the original array is changed)
console.log(removedItems)
// ["Turnip", "Radish"]
					

拷贝数组

let shallowCopy = fruits.slice() // this is how to make a copy
// ["Strawberry", "Mango"]
					

访问数组元素

JavaScript arrays are zero-indexed. The first element of an array is at index 0 , and the last element is at the index value equal to the value of the array's length property minus 1 .

Using an invalid index number returns undefined .

let arr = ['this is the first element', 'this is the second element', 'this is the last element']
console.log(arr[0])              // logs 'this is the first element'
console.log(arr[1])              // logs 'this is the second element'
console.log(arr[arr.length - 1]) // logs 'this is the last element'
					

Array elements are object properties in the same way that toString is a property (to be specific, however, toString() is a method). Nevertheless, trying to access an element of an array as follows throws a syntax error because the property name is not valid:

console.log(arr.0) // a syntax error
					

There is nothing special about JavaScript arrays and the properties that cause this. JavaScript properties that begin with a digit cannot be referenced with dot notation and must be accessed using bracket notation.

For example, if you had an object with a property named 3d , it can only be referenced using bracket notation.

let years = [1950, 1960, 1970, 1980, 1990, 2000, 2010]
console.log(years.0)   // a syntax error
console.log(years[0])  // works properly
					

renderer.3d.setTexture(model, 'character.png')     // a syntax error
renderer['3d'].setTexture(model, 'character.png')  // works properly
					

在 3d 范例， '3d' had to be quoted (because it begins with a digit). But it's also possible to quote the array indexes as well (e.g., years['2'] 而不是 years[2] ), although it's not necessary.

2 in years[2] is coerced into a string by the JavaScript engine through an implicit toString conversion. As a result, '2' and '02' would refer to two different slots on the years object, and the following example could be true :

console.log(years['2'] != years['02'])
					

长度和数值特性之间的关系

JavaScript 数组的 length property and numerical properties are connected.

几个内置数组方法 (如， join() , slice() , indexOf() , etc.) take into account the value of an array's length property when they're called.

其它方法 (如， push() , splice() , etc.) also result in updates to an array's length 特性。

const fruits = []
fruits.push('banana', 'apple', 'peach')
console.log(fruits.length) // 3
					

When setting a property on a JavaScript array when the property is a valid array index and that index is outside the current bounds of the array, the engine will update the array's length property accordingly:

fruits[5] = 'mango'
console.log(fruits[5])            // 'mango'
console.log(Object.keys(fruits))  // ['0', '1', '2', '5']
console.log(fruits.length)        // 6
					

递增 length .

fruits.length = 10
console.log(fruits)              // ['banana', 'apple', 'peach', empty x 2, 'mango', empty x 4]
console.log(Object.keys(fruits)) // ['0', '1', '2', '5']
console.log(fruits.length)       // 10
console.log(fruits[8])           // undefined
					

Decreasing the length property does, however, delete elements.

fruits.length = 2
console.log(Object.keys(fruits)) // ['0', '1']
console.log(fruits.length)       // 2
					

This is explained further on the Array.length 页面。

使用匹配结果创建数组

The result of a match between a RegExp and a string can create a JavaScript array. This array has properties and elements which provide information about the match. Such an array is returned by RegExp.exec() , String.match() ，和 String.replace() .

To help explain these properties and elements, see this example and then refer to the table below:

// Match one d followed by one or more b's followed by one d
// Remember matched b's and the following d
// Ignore case
const myRe = /d(b+)(d)/i
const myArray = myRe.exec('cdbBdbsbz')
					

The properties and elements returned from this match are as follows:

特性/元素	描述	范例
input 只读	The original string against which the regular expression was matched.	"cdbBdbsbz"
index 只读	The zero-based index of the match in the string.	1
[0] 只读	The last matched characters.	"dbBd"
[1], ...[n] 只读	Elements that specify the parenthesized substring matches (if included) in the regular expression. The number of possible parenthesized substrings is unlimited.	[1]: "bB" [2]: "d"

构造函数

Array()

创建新的 Array 对象。

静态特性

get Array[@@species]

The constructor function is used to create derived objects.

静态方法

Array.from()

创建新的 Array 实例从像数组或可迭代对象。

Array.isArray()

返回 true 若自变量是数组，或 false 否则。

Array.of()

创建新的 Array instance with a variable number of arguments, regardless of number or type of the arguments.

实例特性

Array.prototype.length

反射数组元素的个数。

Array.prototype[@@unscopables]

A symbol containing property names to exclude from a with binding scope.

实例方法

Array.prototype.concat()

Returns a new array that is this array joined with other array(s) and/or value(s).

Array.prototype.copyWithin()

Copies a sequence of array elements within the array.

Array.prototype.entries()

返回新的 Array Iterator object that contains the key/value pairs for each index in the array.

Array.prototype.every()

返回 true if every element in this array satisfies the testing function.

Array.prototype.fill()

Fills all the elements of an array from a start index to an end index with a static value.

Array.prototype.filter()

Returns a new array containing all elements of the calling array for which the provided filtering function returns true .

Array.prototype.find()

Returns the found element in the array, if some element in the array satisfies the testing function, or undefined 若找不到。

Array.prototype.findIndex()

Returns the found index in the array, if an element in the array satisfies the testing function, or -1 若找不到。

Array.prototype.forEach()

Calls a function for each element in the array.

Array.prototype.includes()

Determines whether the array contains a value, returning true or false as appropriate.

Array.prototype.indexOf()

返回数组中等于元素的第一 (最小) 元素索引，或 -1 若找不到。

Array.prototype.join()

Joins all elements of an array into a string.

Array.prototype.keys()

返回新的 Array Iterator that contains the keys for each index in the array.

Array.prototype.lastIndexOf()

Returns the last (greatest) index of an element within the array equal to an element, or -1 若找不到。

Array.prototype.map()

Returns a new array containing the results of calling a function on every element in this array.

Array.prototype.pop()

Removes the last element from an array and returns that element.

Array.prototype.push()

Adds one or more elements to the end of an array, and returns the new length of the array.

Array.prototype.reduce()

Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value.

Array.prototype.reduceRight()

Apply a funciton against an accumulator> and each value of the array (from right-to-left) as to reduce it to a single value.

Array.prototype.reverse()

Reverses the order of the elements of an array in place . (First becomes the last, last becomes first.)

Array.prototype.shift()

Removes the first element from an array and returns that element.

Array.prototype.slice()

Extracts a section of the calling array and returns a new array.

Array.prototype.some()

返回 true if at least one element in this array satisfies the provided testing function.

Array.prototype.sort()

Sorts the elements of an array in place and returns the array.

Array.prototype.splice()

Adds and/or removes elements from an array.

Array.prototype.toLocaleString()

Returns a localized string representing the array and its elements. Overrides the Object.prototype.toLocaleString() 方法。

Array.prototype.toString()

Returns a string representing the array and its elements. Overrides the Object.prototype.toString() 方法。

Array.prototype.unshift()

Adds one or more elements to the front of an array, and returns the new length of the array.

Array.prototype.values()

返回新的 Array Iterator object that contains the values for each index in the array.

Array.prototype[@@iterator]()

返回新的 Array Iterator object that contains the values for each index in the array.

范例

创建数组

The following example creates an array, msgArray , with a length of 0 , then assigns values to msgArray[0] and msgArray[99] , changing the length of the array to 100 .

let msgArray = []
msgArray[0] = 'Hello'
msgArray[99] = 'world'
if (msgArray.length === 100) {
  console.log('The length is 100.')
}
					

创建 2 维数组

The following creates a chessboard as a two-dimensional array of strings. The first move is made by copying the 'p' in board[6][4] to board[4][4] . The old position at [6][4] is made blank.

let board = [
  ['R','N','B','Q','K','B','N','R'],
  ['P','P','P','P','P','P','P','P'],
  [' ',' ',' ',' ',' ',' ',' ',' '],
  [' ',' ',' ',' ',' ',' ',' ',' '],
  [' ',' ',' ',' ',' ',' ',' ',' '],
  [' ',' ',' ',' ',' ',' ',' ',' '],
  ['p','p','p','p','p','p','p','p'],
  ['r','n','b','q','k','b','n','r'] ]
console.log(board.join('\n') + '\n\n')
// Move King's Pawn forward 2
board[4][4] = board[6][4]
board[6][4] = ' '
console.log(board.join('\n'))
					

这里是输出：

R,N,B,Q,K,B,N,R
P,P,P,P,P,P,P,P
 , , , , , , ,
 , , , , , , ,
 , , , , , , ,
 , , , , , , ,
p,p,p,p,p,p,p,p
r,n,b,q,k,b,n,r
R,N,B,Q,K,B,N,R
P,P,P,P,P,P,P,P
 , , , , , , ,
 , , , , , , ,
 , , , ,p, , ,
 , , , , , , ,
p,p,p,p, ,p,p,p
r,n,b,q,k,b,n,r
					

Using an array to tabulate a set of values

values = []
for (let x = 0; x < 10; x++){
 values.push([
  2 ** x,
  2 * x ** 2
 ])
}
console.table(values)
					

Results in

// The first column is the index
0	1	0
1	2	2
2	4	8
3	8	18
4	16	32
5	32	50
6	64	72
7	128	98
8	256	128
9	512	162
					

规范

规范	初始发布
ECMAScript (ECMA-262) 在该规范中的 Array 定义。	ECMAScript 1

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
Array	Chrome 1	Edge 12	Firefox 1	IE 4	Opera 4	Safari 1	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
Array() 构造函数	Chrome 1	Edge 12	Firefox 1	IE 4	Opera 4	Safari 1	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
concat	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
copyWithin	Chrome 45	Edge 12	Firefox 32	IE No	Opera 32	Safari 9	WebView Android 45	Chrome Android 45	Firefox Android 32	Opera Android 32	Safari iOS 9	Samsung Internet Android 5.0	nodejs 4.0.0
entries	Chrome 38	Edge 12	Firefox 28	IE No	Opera 25	Safari 8	WebView Android 38	Chrome Android 38	Firefox Android 28	Opera Android 25	Safari iOS 8	Samsung Internet Android 3.0	nodejs 0.12
every	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 9.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
fill	Chrome 45	Edge 12	Firefox 31	IE No	Opera 32	Safari 8	WebView Android 45	Chrome Android 45	Firefox Android 31	Opera Android 32	Safari iOS 8	Samsung Internet Android 5.0	nodejs 4.0.0 4.0.0 0.12 Disabled Disabled From version 0.12: this feature is behind the --harmony runtime flag.
filter	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 9.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
find	Chrome 45	Edge 12	Firefox 25	IE No	Opera 32	Safari 8	WebView Android 45	Chrome Android 45	Firefox Android 4	Opera Android 32	Safari iOS 8	Samsung Internet Android 5.0	nodejs 4.0.0 4.0.0 0.12 Disabled Disabled From version 0.12: this feature is behind the --harmony runtime flag.
findIndex	Chrome 45	Edge 12	Firefox 25	IE No	Opera 32	Safari 8	WebView Android 45	Chrome Android 45	Firefox Android 4	Opera Android 32	Safari iOS 8	Samsung Internet Android 5.0	nodejs 4.0.0 4.0.0 0.12 Disabled Disabled From version 0.12: this feature is behind the --harmony runtime flag.
flat	Chrome 69	Edge 79	Firefox 62	IE No	Opera 56	Safari 12	WebView Android 69	Chrome Android 69	Firefox Android 62	Opera Android 48	Safari iOS 12	Samsung Internet Android 10.0	nodejs 11.0.0
flatMap	Chrome 69	Edge 79	Firefox 62	IE No	Opera 56	Safari 12	WebView Android 69	Chrome Android 69	Firefox Android 62	Opera Android 48	Safari iOS 12	Samsung Internet Android 10.0	nodejs 11.0.0
forEach	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 9.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
from	Chrome 45	Edge 12	Firefox 32	IE No	Opera 32	Safari 9	WebView Android 45	Chrome Android 45	Firefox Android 32	Opera Android 32	Safari iOS 9	Samsung Internet Android 5.0	nodejs 4.0.0
includes	Chrome 47	Edge 14	Firefox 43	IE No	Opera 34	Safari 9	WebView Android 47	Chrome Android 47	Firefox Android 43	Opera Android 34	Safari iOS 9	Samsung Internet Android 5.0	nodejs 6.0.0 6.0.0 5.0.0 Disabled Disabled From version 5.0.0: this feature is behind the --harmony runtime flag.
indexOf	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 9.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
isArray	Chrome 5	Edge 12	Firefox 4	IE 9	Opera 10.5	Safari 5	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 14	Safari iOS 5	Samsung Internet Android 1.0	nodejs 0.1.100
join	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
keys	Chrome 38	Edge 12	Firefox 28	IE No	Opera 25	Safari 8	WebView Android 38	Chrome Android 38	Firefox Android 28	Opera Android 25	Safari iOS 8	Samsung Internet Android 3.0	nodejs 0.12
lastIndexOf	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 9.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
length	Chrome 1	Edge 12	Firefox 1	IE 4	Opera 4	Safari 1	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
map	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 9.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
of	Chrome 45	Edge 12	Firefox 25	IE No	Opera 26	Safari 9	WebView Android 39	Chrome Android 39	Firefox Android 25	Opera Android 26	Safari iOS 9	Samsung Internet Android 4.0	nodejs 4.0.0
pop	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
push	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
reduce	Chrome 3	Edge 12	Firefox 3	IE 9	Opera 10.5	Safari 5	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 14	Safari iOS 4	Samsung Internet Android 1.0	nodejs 0.1.100
reduceRight	Chrome 3	Edge 12	Firefox 3	IE 9	Opera 10.5	Safari 5	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 14	Safari iOS 4	Samsung Internet Android 1.0	nodejs 0.1.100
reverse	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
shift	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
slice	Chrome 1	Edge 12	Firefox 1	IE 4	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
some	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 9.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
sort	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
splice	Chrome 1	Edge 12	Firefox 1	IE 5.5 5.5 From Internet Explorer 5.5 through 8, all elements of the array will not be deleted if deleteCount is omitted. This behavior was fixed in Internet Explorer 9.	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
toLocaleString	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
toSource 非标	Chrome No	Edge No	Firefox 1 — 74 不支持 1 — 74 Starting in Firefox 74, toSource() is no longer available for use by web content. It is still allowed for internal and privileged code.	IE No	Opera No	Safari No	WebView Android No	Chrome Android No	Firefox Android 4	Opera Android No	Safari iOS No	Samsung Internet Android No	nodejs No
toString	Chrome 1	Edge 12	Firefox 1	IE 4	Opera 4	Safari 1	WebView Android ≤37	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
unshift	Chrome 1	Edge 12	Firefox 1	IE 5.5	Opera 4	Safari 1	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0	nodejs 0.1.100
值	Chrome 66	Edge 12	Firefox 60	IE No	Opera 53	Safari 9	WebView Android 66	Chrome Android 66	Firefox Android 60	Opera Android 47	Safari iOS 9	Samsung Internet Android 9.0	nodejs 10.9.0 10.9.0 6.5.0 Disabled --harmony-array-prototype-values flag is required; the --harmony flag is not sufficient in this case. Disabled From version 6.5.0: this feature is behind the --harmony-array-prototype-values runtime flag. 不支持 0.12 — 4.0.0
@@iterator	Chrome 38	Edge 12	Firefox 36 36 不支持 27 — 36 Alternate Name A placeholder property named @@iterator 被使用。 Alternate Name Uses the non-standard name: @@iterator 不支持 17 — 27 Alternate Name A placeholder property named iterator 被使用。 Alternate Name Uses the non-standard name: iterator	IE No	Opera 25	Safari 10	WebView Android 38	Chrome Android 38	Firefox Android 36 36 不支持 27 — 36 Alternate Name A placeholder property named @@iterator 被使用。 Alternate Name Uses the non-standard name: @@iterator 不支持 17 — 27 Alternate Name A placeholder property named iterator 被使用。 Alternate Name Uses the non-standard name: iterator	Opera Android 25	Safari iOS 10	Samsung Internet Android 3.0	nodejs 0.12
@@species	Chrome 51	Edge 79	Firefox 48	IE No	Opera 38	Safari 10	WebView Android 51	Chrome Android 51	Firefox Android 48	Opera Android 41	Safari iOS 10	Samsung Internet Android 5.0	nodejs 6.5.0 6.5.0 6.0.0 Disabled Disabled From version 6.0.0: this feature is behind the --harmony runtime flag.
@@unscopables	Chrome 38	Edge 12	Firefox 48	IE No	Opera 25	Safari 10	WebView Android 38	Chrome Android 38	Firefox Android 48	Opera Android 25	Safari iOS 10	Samsung Internet Android 3.0	nodejs 0.12

图例

完整支持

完整支持

不支持

不支持

非标。预期跨浏览器支持较差。

非标。预期跨浏览器支持较差。

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

使用非标名称。

另请参阅

• 来自 JavaScript 指南：
  • 索引对象特性
  • “Indexed collections: Array object”
• 类型化数组

元数据

• 最后修改： Aug 25, 2020

相关话题

1. 标准内置对象
2. Array
3. 特性
   1. Array.prototype.length
   2. Array.prototype[@@unscopables]
4. 方法
   1. Array.from()
   2. Array.isArray()
   3. Array.of()
   4. Array.prototype.concat()
   5. Array.prototype.copyWithin()
   6. Array.prototype.entries()
   7. Array.prototype.every()
   8. Array.prototype.fill()
   9. Array.prototype.filter()
   10. Array.prototype.find()
   11. Array.prototype.findIndex()
   12. Array.prototype.flat()
   13. Array.prototype.flatMap()
   14. Array.prototype.forEach()
   15. Array.prototype.includes()
   16. Array.prototype.indexOf()
   17. Array.prototype.join()
   18. Array.prototype.keys()
   19. Array.prototype.lastIndexOf()
   20. Array.prototype.map()
   21. Array.prototype.pop()
   22. Array.prototype.push()
   23. Array.prototype.reduce()
   24. Array.prototype.reduceRight()
   25. Array.prototype.reverse()
   26. Array.prototype.shift()
   27. Array.prototype.slice()
   28. Array.prototype.some()
   29. Array.prototype.sort()
   30. Array.prototype.splice()
   31. Array.prototype.toLocaleString()
   32. Array.prototype.toSource()
   33. Array.prototype.toString()
   34. Array.prototype.unshift()
   35. Array.prototype.values()
   36. Array.prototype[@@iterator]()
   37. get Array[@@species]
5. 继承：
6. Function
7. 特性
   1. Function.arguments
   2. Function.caller
   3. Function.displayName
   4. Function.length
   5. Function.name
8. 方法
   1. Function.prototype.apply()
   2. Function.prototype.bind()
   3. Function.prototype.call()
   4. Function.prototype.toSource()
   5. Function.prototype.toString()
9. Object
10. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
11. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()