The initial value of the `@@iterator` property is the same function object as the initial value of the `values` property.

## 语法

    mySet[Symbol.iterator]

### 返回值

The `Set` iterator function, which is the `values()` function by default.

## 示例

### Using `[@@iterator]()`

    var mySet = new Set();
    mySet.add("0");
    mySet.add(1);
    mySet.add({});

    var setIter = mySet[Symbol.iterator]();

    console.log(setIter.next().value); // "0"
    console.log(setIter.next().value); // 1
    console.log(setIter.next().value); // Object

### Using `[@@iterator]()` with `for..of`

    var mySet = new Set();
    mySet.add("0");
    mySet.add(1);
    mySet.add({});

    for (var v of mySet) {
      console.log(v);
    }

## 规范

规范 | 状态 | 说明
--- | --- | ---
ECMAScript 2015 (6th Edition, ECMA-262) Set.prototype[@@iterator] | Standard | Initial definition.
ECMAScript Latest Draft (ECMA-262) Set.prototype[@@iterator] | Draft |

## 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 | (Yes) | (Yes) | 36.0 (36) [1] | 未实现 | 未实现 | 未实现

[1] From Gecko 17 (Firefox 17 / Thunderbird 17 / SeaMonkey 2.14) to Gecko 26 (Firefox 26 / Thunderbird 26 / SeaMonkey 2.23 / Firefox OS 1.2) the `iterator` property was used (bug 907077), and from Gecko 27 to Gecko 35 the `"@@iterator"` placeholder was used. In Gecko 36 (Firefox 36 / Thunderbird 36 / SeaMonkey 2.33), the `@@iterator` symbol got implemented (bug 918828).

## 请参阅

- `Set.prototype.entries()`
- `Set.prototype.keys()`
- `Set.prototype.values()`