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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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support38 ?

361

27 — 362 3

17 — 274

No25 Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS 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.

See also

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 Zuletzt aktualisiert von: fscholz,