Bacancy Technology

Bacancy Technology represents the connected world, offering innovative and customer-centric information technology experiences, enabling Enterprises, Associates and the Society to Rise™.

12+

Countries where we have happy customers

1050+

Agile enabled employees

World wide offices

12+

Years of Experience

Agile Coaches

Certified Scrum Masters

1000+

Clients projects

1458

Happy customers

JavaScript

February 2, 2024

How To Empty an Array in JavaScript?

To make an already existing array empty in JavaScript, you can use several methods to remove all elements from the array:

Setting Length to 0:

You can set the length property of the array to 0. This method truncates the array, effectively removing all its elements:

let arr = [1, 2, 3];
arr.length = 0; // Makes the 'arr' array empty

Using splice():

You can use the splice() method to remove all elements from the array starting from index 0:

let arr = [1, 2, 3];
arr.splice(0, arr.length); // Removes all elements from 'arr'

Using pop() in a Loop:

You can repeatedly use the pop() method in a loop to remove elements until the array becomes empty:

let arr = [1, 2, 3];
while (arr.length > 0) {
 arr.pop();
}

Assigning a New Empty Array:

You can assign a new empty array [] to the existing array variable. This reassigns the variable to reference a new empty array, effectively emptying the original array:

let arr = [1, 2, 3];
arr = []; // Assigns 'arr' to a new empty array, making the original array empty

Support On Demand!

Related Q&A

What is the Most Efficient Way to Deep Clone an Object in JavaScript?

Conditional Javascript Filter

Compare Two Dates With JavaScript

How to Convert an Array into an Object?

How to Convert a String to an Array in JavaScript_TypeScript