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      JS Set.prototype[@@iterator]()

      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]StandardInitial 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.

      • Desktop
      • Mobile
      FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari
      Basic support(Yes)36 (36) [1]未实现未实现未实现
      FeatureAndroidChrome for AndroidFirefox Mobile (Gecko)IE MobileOpera MobileSafari 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

      目录
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