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

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 Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Array.prototype.entries' in that specification.
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'Array.prototype.entries' in that specification.
Draft  

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
entriesChrome Full support 38Edge Full support 12Firefox Full support 28IE No support NoOpera Full support 25Safari Full support 8WebView Android Full support YesChrome Android Full support YesFirefox Android Full support 28Opera Android Full support YesSafari iOS Full support 8Samsung Internet Android Full support Yesnodejs Full support 0.12

Legend

Full support  
Full support
No support  
No support

See also