How Do I Change the Background Color With JavaScript

JavaScript is one of the most widely used programming languages in web development.

It is used to add interactivity and dynamic effects to websites, making them more user-friendly and appealing.

In this tutorial, we’ll be covering one of the most fundamental and basic effects in JavaScript: changing the background color of an HTML element.

Introduction to JavaScript and CSS

Before we dive into the details, let’s start with a brief overview of JavaScript and CSS.

JavaScript is a scripting language that is executed on the client side (in the browser).

It allows you to add interactivity, validation, and other dynamic features to your websites.

CSS (Cascading Style Sheets) is a stylesheet language that is used to define the layout, formatting, and styling of HTML elements.

Changing the Background Color of an HTML Element using JavaScript

To change the background color of an HTML element using JavaScript, you need to follow these steps:

  • Get the HTML element you want to change the background color of. You can do this using document.getElementById(), document.getElementsByClassName(), or document.getElementsByTagName().
  • Use the style property of the element to access its CSS properties.
  • Set the backgroundColor property of the element’s style to the desired color value.

Let’s take a look at the code that demonstrates these steps:

      function changeColor() {
        var element = document.getElementById("myDiv"); = "blue";
    <div id="myDiv">This is a div</div>
    <button onclick="changeColor()">Change Color</button>

In this code, we first get the element with an ID of “myDiv” using document.getElementById().

We then use the style property to access the CSS properties of the element, and finally, we set the backgroundColor property to “blue”.

When the button is clicked, the background color of the div element will change to blue.


In conclusion, changing the background color of an HTML element using JavaScript is a simple and straightforward process.

By following the steps outlined in this article, you can quickly add dynamic and interactive effects to your websites.