How do I fix reduced unused JavaScript and CSS when I increase the website speed?

In this post  we are are discuss about how to reduce unused Javascript and CSS. Unused Javascript and CSS effect the website speed. If you want to your website loading speed fast then it is necessary to reduced unused javascript and CSS. There are many ways to reduce the amount of unused JavaScript and CSS on a website in order to increase its speed:

1. Use a tool such as Google Chrome's "Coverage" tab in the developer tools to identify which Javascript and CSS are not being used on the page.

Steps to find unused javascript and css using coverage tool:

A. Open Chrome DevTools

• Control + Shift + I
• or Command + Alt + I on Mac

B. Open the Command Menu

• Control + Shif t +P
• or Command + Shift + P on Mac
• Type + click the following: "Show Coverage"
• Click the reload button to reload the page and to see which code is loaded
• Then double click on the JS or CSS file that you want to unminify. The file gets opened in a new pane, unminified, even if the original file is minified by the developer, build proces or CDN.

2. Minify and compress your JavaScript and CSS files to make them smaller and faster to load.

3. Use a tool such as PurgeCSS to remove unused CSS selectors from your stylesheets.

4. Use code splitting and dynamic imports to only load the JavaScript code that is needed for the current page.

5. Use a Content Delivery Network (CDN) to serve your static assets from a location that is closer to the user.

6. Use browser caching to store assets on the user's device so that they don't have to be downloaded again on subsequent page loads.

7. Use the "async" and "defer" attributes on your script tags to load JavaScript asynchronously and prevent it from blocking the rendering of the page.

<script defer src="Javascript.js"></script>

<script src=''Newjavascipt.js" async></script> 

8. Use a tool like Lazy Load to only load images and other resources when they are needed.

9. Use a tool like Webpack Bundle Analyzer to analyse the size and composition of your JavaScript bundles and identify code that can be removed or optimized.

It is important to note that the specific solution will depend on the structure and complexity of your website.

FAQ

Qusestion1: Can unused JavaScript slow down your page load speed?

Answer: As a result, the size of the website's resources increases, which slows down page loads and worsens the user experience.

Qusestion2: How do I fix unused JavaScript?

Answer: If your website is powered by WordPress, you can use special plugins to remove any unnecessary JavaScript from its pages.

Qusestion3: How do I fix page load time?

Answer: 1. Optimize Image Size and Format.

2. Optimize Dependencies.

3. Avoid Inline JS and CSS files.

4. Optimize Caching.

5. Avoid render blocking scripts.

6. Avoid Redirects.

7. Set up G-Zip Encoding.

8. Reduce HTTP Requests.

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