TypeScript - fill array with default values

In this article, we would like to show you how to fill an array with default values in TypeScript.

Quick solution:

const array: number[] = Array(3).fill(0);

console.log(array); // [ 0, 0, 0 ]

Practical examples

In the below examples, we create an array with size 3 and use fill() method to fill all its elements with the default values.

const array: number[] = Array(3).fill(1);

console.log(array); // [ 1, 1, 1 ]

const array: string[] = Array(3).fill('A');

console.log(array); // [ 'A', 'A', 'A' ]

const array: boolean[] = Array(3).fill(false);

console.log(array); // [ false, false, false ]