Web/JavaScript/Reference/Global objects/Array/entries

The entries() method returns a new Array Iterator object that contains the key/value pairs for each index in the array.

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Syntax

array.entries()

Return value

A new Array iterator object.

Examples

Iterating with index and element

const a = ['a', 'b', 'c'];

for (const [index, element] of a.entries())
  console.log(index, element);

// 0 'a' 
// 1 'b' 
// 2 'c'

Using a for…of loop

var a = ['a', 'b', 'c'];
var iterator = a.entries();

for (let e of iterator) {
  console.log(e);
}
// [0, 'a']
// [1, 'b']
// [2, 'c']

Specifications

Specification
ECMAScript (ECMA-262)The definition of 'Array.prototype.entries' in that specification.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`entries`	Chrome Full support 38	Edge Full support 12	Firefox Full support 28	IE No support No	Opera Full support 25	Safari Full support 8	WebView Android Full support 38	Chrome Android Full support 38	Firefox Android Full support 28	Opera Android Full support 25	Safari iOS Full support 8	Samsung Internet Android Full support 3.0	nodejs Full support 0.12

Legend

Full support: Full support
No support: No support