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• 句法
• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place .

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法

let arrDeletedItems = array.splice(start[, deleteCount[, item1[, item2[, ...]]]])
					

参数

start

The index at which to start changing the array.

If greater than the length of the array, start will be set to the length of the array. In this case, no element will be deleted but the method will behave as an adding function, adding as many element as item[n*] provided.

If negative, it will begin that many elements from the end of the array. (In this case, the origin -1 , meaning - n is the index of the n ^th last element, and is therefore equivalent to the index of array .length - n .) If array .length + start is less than 0 , it will begin from index 0 .

deleteCount 可选

An integer indicating the number of elements in the array to remove from start .

若 deleteCount is omitted, or if its value is equal to or larger than array .length - start (that is, if it is equal to or greater than the number of elements left in the array, starting at start ), then all the elements from start to the end of the array will be deleted.

注意： In IE8, it won't delete all when deleteCount is omitted.

若 deleteCount is 0 or negative, no elements are removed. In this case, you should specify at least one new element (see below).

item1 , item2 , ... 可选

The elements to add to the array, beginning from start . If you do not specify any elements, splice() will only remove elements from the array.

返回值

An array containing the deleted elements.

If only one element is removed, an array of one element is returned.

If no elements are removed, an empty array is returned.

描述

If the specified number of elements to insert differs from the number of elements being removed, the array's length will be changed.

范例

Remove 0 (zero) elements before index 2, and insert "drum"

let myFish = ['angel', 'clown', 'mandarin', 'sturgeon']
let removed = myFish.splice(2, 0, 'drum')
// myFish is ["angel", "clown", "drum", "mandarin", "sturgeon"]
// removed is [], no elements removed
							

Remove 0 (zero) elements before index 2, and insert "drum" and "guitar"

let myFish = ['angel', 'clown', 'mandarin', 'sturgeon']
let removed = myFish.splice(2, 0, 'drum', 'guitar')
// myFish is ["angel", "clown", "drum", "guitar", "mandarin", "sturgeon"]
// removed is [], no elements removed
							

Remove 1 element at index 3

let myFish = ['angel', 'clown', 'drum', 'mandarin', 'sturgeon']
let removed = myFish.splice(3, 1)
// myFish is ["angel", "clown", "drum", "sturgeon"]
// removed is ["mandarin"]
							

Remove 1 element at index 2, and insert "trumpet"

let myFish = ['angel', 'clown', 'drum', 'sturgeon']
let removed = myFish.splice(2, 1, 'trumpet')
// myFish is ["angel", "clown", "trumpet", "sturgeon"]
// removed is ["drum"]
							

Remove 2 elements from index 0, and insert "parrot", "anemone" and "blue"

let myFish = ['angel', 'clown', 'trumpet', 'sturgeon']
let removed = myFish.splice(0, 2, 'parrot', 'anemone', 'blue')
// myFish is ["parrot", "anemone", "blue", "trumpet", "sturgeon"]
// removed is ["angel", "clown"]
							

Remove 2 elements from index 2

let myFish = ['parrot', 'anemone', 'blue', 'trumpet', 'sturgeon']
let removed = myFish.splice(2, 2)
// myFish is ["parrot", "anemone", "sturgeon"]
// removed is ["blue", "trumpet"]
							

Remove 1 element from index -2

let myFish = ['angel', 'clown', 'mandarin', 'sturgeon']
let removed = myFish.splice(-2, 1)
// myFish is ["angel", "clown", "sturgeon"]
// removed is ["mandarin"]
							

Remove all elements from index 2

let myFish = ['angel', 'clown', 'mandarin', 'sturgeon']
let removed = myFish.splice(2)
// myFish is ["angel", "clown"]
// removed is ["mandarin", "sturgeon"]
							

规范

规范
ECMAScript (ECMA-262) The definition of 'Array.prototype.splice' in that specification.

浏览器兼容性

The compatibility table in 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
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

图例

完整支持

完整支持

见实现注意事项。

另请参阅

• push() / pop() — add/remove elements from the end of the array
• unshift() / shift() — add/remove elements from the beginning of the array
• concat() — returns a new array comprised of this array joined with other array(s) and/or value(s)

元数据

• 最后修改： Aug 10, 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
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11. 方法
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    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()
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