array.entries

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

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

console.log(iterator.next().value); // [0, 'a']
console.log(iterator.next().value); // [1, 'b']
console.log(iterator.next().value); // [2, 'c']

Syntax

a.entries()

Return value

A new Array iterator object.

Examples

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 2017 Draft (ECMA-262) The definition of 'Array.prototype.entries' in that specification.	Draft

Browser compatibility

See also

• Array.prototype.keys()
• Array.prototype.values()
• Array.prototype.forEach()
• Array.prototype.every()
• Array.prototype.some()
• for...of
• Iteration protocols