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

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

[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()