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Learn how to maintain the state of a number even after refreshing your web page by utilizing JavaScript and Local Storage. Follow our step-by-step guide for a seamless user experience!
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This video is based on the question https://stackoverflow.com/q/73030967/ asked by the user 'Neptunium' ( https://stackoverflow.com/u/19576367/ ) and on the answer https://stackoverflow.com/a/73031106/ provided by the user 'Mohamed EL-Gendy' ( https://stackoverflow.com/u/4000130/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Save a Number After Page Refresh Using JavaScript and Local Storage

Have you ever encountered a situation where your web page displays a number that resets to zero upon refresh? This can be particularly frustrating if you're building a web application where maintaining the state of a number is essential, such as a counter or a score. In this guide, we will guide you through the process of keeping that number persistent even after the user refreshes the page, using simple JavaScript and Local Storage.

Understanding the Problem

When a user refreshes a webpage, all the JavaScript variables are reset, which means any ongoing counter will stop and revert to its initial state. For example, if you have an incrementing counter visible on your page, upon refresh, you lose the progress made. This is where Local Storage comes into play. Local Storage allows us to save data in the web browser securely, so it persists even after the page is refreshed.

Step-by-Step Solution

Here is a breakdown of how to store and retrieve the number using Local Storage in conjunction with JavaScript.

1. Setting Up Your HTML Structure

Start by creating a simple HTML structure to display your numbers. Here's a basic setup:

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

2. Styling the Numbers

You can add some simple CSS to style the display of the numbers:

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

3. Implementing the Increment Functionality

Next, use JavaScript to implement the logic that increases the numbers. Initially, you would increment numbers without worrying about persistence:

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

4. Adding Local Storage Support

Now comes the crucial part: modifying the JavaScript to utilize Local Storage to preserve the values of number1 and number2 across page refreshes. Update your JavaScript code as follows:

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

5. Testing the Result

Now test your code! Refresh the page, and you will see that the counter keeps its count. You won't lose the incremented values anymore.

Conclusion

Using Local Storage allows you to retain the state of your variables even after refreshing a webpage. This approach is particularly useful for applications where user progress needs to be tracked smoothly. For web developers, leveraging Local Storage enhances user experience and prevents loss of data, which could be crucial in many applications. Try applying this technique in your projects and see the difference!