The push() method adds new items to the end of an array. The push() method changes the length of the array. The push() method returns the new length.

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.

Feb 25, 2009 · You want the splice function on the native array object. arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2: UPDATE (24 May 2024)

If you want to push elements that are in an array at the beginning of your array, use <func>.apply(<this>, <Array of args>): const arr = [1, 2]; arr.unshift.apply(arr, [3, 4]); console.log(arr); // [3, 4, 1, 2]

Using an array literal is the easiest way to create a JavaScript Array. Syntax: const array_name = [item1, item2, ...]; It is a common practice to declare arrays with the const keyword. Learn more about const with arrays in the chapter: JS Array Const. Spaces and line breaks are not important. A declaration can span multiple lines:

Sep 9, 2020 · There are various ways to add or append an item to an array. We will make use of push , unshift , splice , concat , spread and index to add items to an array. Let’s discuss all the 6 different methods one by one in brief.

Jul 18, 2022 · When you want to add an element to the end of your array, use push(). If you need to add an element to the beginning of your array, use unshift(). If you want to add an element to a particular location of your array, use splice(). And finally, when you want to maintain your original array, you can use the concat() method.

Aug 24, 2024 · JavaScript provides multiple ways to add items to an array. Each with its use cases that you can consider depending upon your needs. push() and unshift() are the most common methods that are used to add elements to an array.

2 days ago · Items to add. Code: Output: [ 'cat', 'elephant', 'lion', 'dog', 'rabbit' ] JavaScript concat() Method. The concat() method is used to join two or more arrays or to add new elements to an existing array. ... JavaScript arrays are dynamic, which means that they are not fixed in size like arrays in some languages like C or Java. It provides ...