Скачать или смотреть How to Permanently Change the Background Color of Your HTML Page Using JavaScript

A step-by-step guide on how to use JavaScript and localStorage to permanently change the background color of your HTML page.
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How to Permanently Change the Background Color of Your HTML Page Using JavaScript

Have you ever tried to change the background color of your HTML page with JavaScript but found that the change was only temporary? You clicked a button, saw the color change, but it reverted back to the original after a second. This common issue arises because the styles are not saved or stored correctly. In this guide, we'll show you how to solve this problem using localStorage.

Understanding the Problem

When you change the background color using JavaScript, without proper handling, the change will only last until the page reloads or the user navigates away. The background can return to its original state because the change is not stored. To achieve a permanent change, we can take advantage of the localStorage feature in modern web browsers, which allows you to save data across sessions.

Solution Overview

We will develop a small script that:

Captures the color input from a text field.

Changes the background color when a button is clicked.

Saves the color in localStorage so that it persists across page loads.

Step 1: HTML Structure

First, let's create a simple HTML structure. Here's a basic outline:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: CSS Styles

Ensure you have some basic styles to make your page presentable. Here’s an example CSS setup:

[[See Video to Reveal this Text or Code Snippet]]

You can save the above CSS snippets in an external.css file.

Step 3: JavaScript Logic

The heart of the functionality is in the JavaScript. We need to capture the button click and set the localStorage. Here’s the logic you'll implement:

[[See Video to Reveal this Text or Code Snippet]]

How it Works

Load Event: The script waits until the page fully loads.

Change Color: When the user types a color into the input field and clicks the "Change Color" button, the script changes the background color of the div and saves this color in localStorage.

Persistence: On loading the page, if there’s a color stored in localStorage, it sets the page background color to that stored value.

Conclusion

By following the steps outlined in this guide, you can easily implement a feature that allows users to change the background color of your webpage permanently. The use of localStorage ensures that the selected color persists even after page reloads or navigating away from the page.

Feel free to expand this functionality further by adding more features, such as themed colors or additional controls for user interaction. Happy coding!