Feb 25, 2009 · Using the splice method is surely the best answer if you need to insert into an array in-place. However, if you are looking for an immutable function that returns a new updated array instead of mutating the original array on insert, you can use the following function.

Dec 9, 2008 · To append a single item to an array, use the push() method provided by the Array object: const fruits = ['banana', 'pear', 'apple'] fruits.push('mango') console.log(fruits) push() mutates the original array.

Nov 17, 2024 · Here are different ways to add elements to an array in JavaScript. 1. Using push () Method. The push () method adds one or more elements to the end of an array and returns the new length of the array. Syntax. 10, 20, 30, 40, 50, 60, 70. 2. Using unshift () Method.

Apr 25, 2023 · Here are the steps to insert an element at a specific index in an array: Create a new empty array. Copy the elements before the specific index from the original array to the new array. Add the new element to the new array. Copy the elements after the specific index from the original array to the new array.

Jun 6, 2011 · Put anything into an array using Array.push (). Extra information on Arrays. Add more than one item at a time. Add items to the beginning of an array. Add the contents of one array to another. Create a new array from the contents of two arrays.

Nov 22, 2024 · JavaScript - Insert Elements at a Given Position in an JS Array To insert an element at a specific position in a JavaScript array, the JS splice() method is used. [GFGTABS] JavaScript let a = [10, 20, 30, 40]; let e = 50; let i = 2; a.splice(i - 1, 0, e); console.log(a); [/GFGTABS]Output[ 10, 50, 20, 30, 40 ] Table of Content Using built-in ...

Mar 3, 2020 · Here are the different JavaScript functions you can use to add elements to an array: #1 push – Add an element to the end of the array #2 unshift – Insert an element at the beginning of the array #3 spread operator – Adding elements to an array using the new ES6 spread operator #4 concat – This can be used to append an array to another array

In this example, you will learn to write a JavaScript program that will insert an item at a specific index into an array.

Jul 18, 2022 · In practice, an array could hold a list of users, and we might need to add an element(s) to the array after the last element, before the first element, or at any specified point in our array. This article will show you how to insert an element into an array using JavaScript.

6 different JavaScript functions you can use to add elements to an array. We will use push method, unshift method, spread operator, concat method, splice method, length property