**`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*****改变原数组**。
**splice(index,change,value)**
**index**:开始的下标
**change**:代表删除的元素
**value**:插入的值,不写直接删除
```js
const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]
months.splice(4, 1, 'May');
// replaces 1 element at index 4
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "May"]
```
**适用于数组**
**splice(index,change,value)**
**index**:开始的下标
**change**:代表删除的元素
**value**:插入的值,不写直接删除
```js
const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]
months.splice(4, 1, 'May');
// replaces 1 element at index 4
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "May"]
```
**适用于数组**
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