splice()
方法通过删除或替换现有元素或者原地添加新的元素来修改数组,并以数组形式返回被修改的内容。此方法会改变原数组。
交互范例的源码储存于 GitHub 仓库。想要参与此项目,可 clone https://github.com/mdn/interactive-examples 并发送 pull request 给我们。
array.splice(start[, deleteCount[, item1[, item2[, ...]]]])
start
array.length-n
);如果负数的绝对值大于数组的长度,则表示开始位置为第0位。deleteCount
可选deleteCount
大于 start
之后的元素的总数,则从 start
后面的元素都将被删除(含第 start
位)。deleteCount
被省略了,或者它的值大于等于array.length - start
(也就是说,如果它大于或者等于start
之后的所有元素的数量),那么start
之后数组的所有元素都会被删除。deleteCount
是 0 或者负数,则不移除元素。这种情况下,至少应添加一个新元素。item1, item2, ...
可选start
位置开始。如果不指定,则 splice()
将只删除数组元素。由被删除的元素组成的一个数组。如果只删除了一个元素,则返回只包含一个元素的数组。如果没有删除元素,则返回空数组。
如果添加进数组的元素个数不等于被删除的元素个数,数组的长度会发生相应的改变。
var myFish = ["angel", "clown", "mandarin", "surgeon"];
var removed = myFish.splice(2, 0, "drum");
// 运算后的 myFish: ["angel", "clown", "drum", "mandarin", "surgeon"]
// 被删除的元素: [], 没有元素被删除
var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(2, 0, 'drum', 'guitar');
// 运算后的 myFish: ["angel", "clown", "drum", "guitar", "mandarin", "sturgeon"]
// 被删除的元素: [], 没有元素被删除
var myFish = ['angel', 'clown', 'drum', 'mandarin', 'sturgeon'];
var removed = myFish.splice(3, 1);
// 运算后的 myFish: ["angel", "clown", "drum", "sturgeon"]
// 被删除的元素: ["mandarin"]
var myFish = ['angel', 'clown', 'drum', 'sturgeon'];
var removed = myFish.splice(2, 1, "trumpet");
// 运算后的 myFish: ["angel", "clown", "trumpet", "surgeon"]
// 被删除的元素: ["drum"]
var myFish = ['angel', 'clown', 'trumpet', 'sturgeon'];
var removed = myFish.splice(0, 2, 'parrot', 'anemone', 'blue');
// 运算后的 myFish: ["parrot", "anemone", "blue", "trumpet", "sturgeon"]
// 被删除的元素: ["angel", "clown"]
var myFish = ['parrot', 'anemone', 'blue', 'trumpet', 'sturgeon'];
var removed = myFish.splice(myFish.length - 3, 2);
// 运算后的 myFish: ["parrot", "anemone", "sturgeon"]
// 被删除的元素: ["blue", "trumpet"]
var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(-2, 1);
// 运算后的 myFish: ["angel", "clown", "sturgeon"]
// 被删除的元素: ["mandarin"]
var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(2);
// 运算后的 myFish: ["angel", "clown"]
// 被删除的元素: ["mandarin", "sturgeon"]
规范 | 状态 | 备注 |
---|---|---|
ECMAScript 3rd Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.2. |
ECMAScript 5.1 (ECMA-262) Array.prototype.splice |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) Array.prototype.splice |
Standard | |
ECMAScript Latest Draft (ECMA-262) Array.prototype.splice |
Draft |
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
splice | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 5.5 | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes | nodejs Full support Yes |