JavaScript (ES2026) reference · Array Methods

JavaScript Array push() Method

Add one or more elements to the end of the array and return the new length. Changes the array in place.

JavaScript (ES2026) Since ES3

Syntax

array.push(element1, /* …, */ elementN)

Parameter	Description
`elements`	The elements to add.

The new length.

Add to the endTry it yourself

const cart = ["tea"];
const newLength = cart.push("cake", "jam");
console.log(cart, newLength);

Output

[ 'tea', 'cake', 'jam' ] 3

Push all elements of another arrayTry it yourself

const a = [1, 2];
a.push(...[3, 4]); // add every element of another array
console.log(a);

Output

[ 1, 2, 3, 4 ]

push() returns the new length, not the array, so don't chain array methods after it.

Version	Change
JavaScript ES3	Added

array.pop() · Remove the last element from the array and return it. Changes the array; returns undefined if it is empty.
array.unshift() · Add one or more elements to the start of the array and return the new length. Changes the array in place.
array.concat() · Return a new array that joins this array with other arrays or values. The original arrays are not changed.
JavaScript Arrays · tutorial
JavaScript Array Methods · tutorial