JavaScript (ES2026) reference · Array Methods

JavaScript Array entries() Method

Return an iterator of [index, element] pairs, handy for looping with both the index and the value.

JavaScript (ES2026) Since ES2015

Syntax

array.entries()

An array iterator.

Index and value in for…ofTry it yourself

const fruits = ["apple", "banana"];
for (const [i, fruit] of fruits.entries()) {
  console.log(i, fruit);
}

Output

0 apple
1 banana

Spread into an arrayTry it yourself

console.log([...["a", "b"].entries()]);

Output

[ [ 0, 'a' ], [ 1, 'b' ] ]

Version	Change
JavaScript ES2015	Added

array.keys() · Return an iterator of the array's indexes, including indexes of empty slots.
array.values() · Return an iterator of the array's values, the same thing a for…of loop uses.
array.forEach() · Call a function once for each element. It returns undefined, so use map() when you need a new array.
JavaScript Arrays · tutorial
JavaScript Array Methods · tutorial