change background color in javascript

Manipulating the visual aesthetics of a webpage using JavaScript is one of the main advantages of this popular scripting language. In this article, we’ll be learning how to use JavaScript to change the background color of a webpage.

Code snippet

Here’s a simple way of achieving this using JavaScript:

document.body.style.backgroundColor = "blue";

Code Explanation

Let’s break this code down step by step:

1. document: This is a built-in JavaScript object that refers to the webpage loaded into the browser.

2. body: This is a property of the document object and represents the body of the current document. It is also the node in the Document Object Model (DOM) that your browser creates when loading a webpage.

3. style: Using this property, you can access all the CSS styles set on an element.

4. backgroundColor: This represents the background color CSS property and allows you to set a new background color.

5. "blue": This is the value we’re assigning to the background color property. You can replace “blue” with any valid color name or RGB value.

When you run this piece of code, JavaScript accesses the style attribute of the body of the current document and changes its background color to blue.

Please note that you should place this script either in the head section of your HTML document, surrounded by script tags, or place it within an event-handler function if you want to trigger the color change through a user action such as a button click:

function changeBackgroundColor() {
  document.body.style.backgroundColor = "blue";
}

This script will not execute until the function changeBackgroundColor() is called.

In conclusion, JavaScript provides a simple and flexible way to control the styling of a webpage, including changes like modifying the background color.