The initial value of the @@iterator property is the same function object as the initial value of the values property.
mySet[Symbol.iterator]
The Set iterator function, which is the values() function by default.
[@@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
[@@iterator]() with for..of
var mySet = new Set();
mySet.add('0');
mySet.add(1);
mySet.add({});
for (var v of mySet) {
console.log(v);
}
| Specification | Status | Comment |
|---|---|---|
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Set.prototype[@@iterator]' in that specification. | Standard | Initial definition. |
| ECMAScript Latest Draft (ECMA-262) The definition of 'Set.prototype[@@iterator]' in that specification. | Draft |
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | Yes | Yes |
17 — 271 364 |
No | Yes | Yes |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | Yes | Yes | Yes |
17 — 271 364 |
Yes | Yes | ? |
1. Supported as iterator.
2. A placeholder property named @@iterator is used.
3. Supported as @@iterator.
4. The @@iterator symbol is implemented.
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/@@iterator