The initial value of the @@iterator
property is the same function object as the initial value of the values()
property.
Syntax
arr[Symbol.iterator]()
Return value
The array iterator function, which is the values()
function by default.
Examples
Iteration using for...of
loop
var arr = ['w', 'y', 'k', 'o', 'p']; var eArr = arr[Symbol.iterator](); // your browser must support for..of loop // and let-scoped variables in for loops for (let letter of eArr) { console.log(letter); }
Alternative iteration
var arr = ['w', 'y', 'k', 'o', 'p']; var eArr = arr[Symbol.iterator](); console.log(eArr.next().value); // w console.log(eArr.next().value); // y console.log(eArr.next().value); // k console.log(eArr.next().value); // o console.log(eArr.next().value); // p
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Array.prototype[@@iterator]()' in that specification. |
Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262) The definition of 'Array.prototype[@@iterator]()' in that specification. |
Living Standard |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 38 | ? | 361 17 — 274 | No | 25 | Yes |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
---|---|---|---|---|---|---|---|
Basic support | Yes | Yes | ? | 36 | No | Yes | Yes |
1. The @@iterator
symbol is implemented.
2. A placeholder property named @@iterator
is used.
3. Supported as @@iterator
.
4. Supported as iterator
.