@@iterator 的初始值是和 `values` 属性的初始值相同的对象。

## 语法

    arr[Symbol.iterator]()

### 返回值

数组的 迭代器 函数，通常是 `values()`函数。

## 示例

### 使用`for...of` 循环的迭代

    var arr = new Uint8Array([10, 20, 30, 40, 50]);
    // 你的浏览器必须支持 for..of 循环
    // 以及 for 循环中的 let 区域变量
    for (let n of arr) {
      console.log(n);
    }

### 备选迭代

    var arr = new Uint8Array([10, 20, 30, 40, 50]);
    var eArr = arr[Symbol.iterator]();
    console.log(eArr.next().value); // 10
    console.log(eArr.next().value); // 20
    console.log(eArr.next().value); // 30
    console.log(eArr.next().value); // 40
    console.log(eArr.next().value); // 50

## 规范

Specification | Status | Comment
--- | --- | ---
ECMAScript 2015 (6th Edition, ECMA-262) %TypedArray%.prototype[@@iterator]() | Standard | 初始定义。
ECMAScript Latest Draft (ECMA-262) %TypedArray%.prototype[@@iterator]() | Draft |

## 浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

- Desktop
- Mobile

Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari
--- | --- | --- | --- | --- | ---
Basic support | (Yes) | 36 (36) [1] | 未实现 | 未实现 | 未实现

Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile
--- | --- | --- | --- | --- | --- | ---
Basic support | 未实现 | (Yes) | 36.0 (36) [1] | 未实现 | 未实现 | 未实现

[1] 从 Gecko 17 (Firefox 17 / Thunderbird 17 / SeaMonkey 2.14) 到 Gecko 26 (Firefox 26 / Thunderbird 26 / SeaMonkey 2.23 / Firefox OS 1.2) 使用 `iterator` 属性 (bug 907077)，从 Gecko 27 到 Gecko 35 使用`"@@iterator"` 占位符。 在 Gecko 36 (Firefox 36 / Thunderbird 36 / SeaMonkey 2.33)中，`@@iterator` Symbol 予以实现(bug 918828)。

## See also

- JavaScript typed arrays
- `TypedArray`
- `TypedArray.prototype.entries()`
- `TypedArray.prototype.keys()`
- `TypedArray.prototype.values()`