How to remove unused javascript in wordpress

Last Updated: Jan 23, 2024 by

If you have a WordPress website, you may have noticed that your site is loading slowly or experiencing other performance issues. One of the main culprits of this is unused javascript. In this article, we will discuss what unused javascript is, why it can negatively impact your website, and How to remove it from your WordPress site.

What is Unused Javascript?

Unused javascript, also known as “dead code”, is code that is present on your website but is not being used. This can happen for a variety of reasons, such as when a plugin or theme is deactivated or when a developer has added code that is no longer needed. Unused javascript can also be present in themes and plugins that you have installed but are not actively using on your site.

Why is Unused Javascript a Problem?

Website loading slowly

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Unused javascript can cause a variety of issues for your website. The most common issue is slow loading times. When a browser loads a webpage, it has to download and process all of the code on the page, including unused javascript. This can significantly slow down your website’s loading time, which can lead to a poor user experience and lower search engine rankings.

Unused javascript can also cause conflicts with other scripts on your website, leading to errors and broken functionality. This can be especially problematic if the unused javascript is from a plugin or theme that is essential for your website’s functionality.

How to Identify Unused Javascript on Your WordPress Site

Before you can remove unused javascript from your WordPress site, you need to identify which scripts are not being used. There are a few ways to do this:

  • Use a plugin: There are several plugins available that can scan your website and identify unused javascript. Some popular options include Asset CleanUp, WP Asset CleanUp, and WP Rocket.
  • Use your browser’s developer tools: Most modern browsers have built-in developer tools that allow you to inspect the code on a webpage. You can use these tools to identify which scripts are being loaded on your site and which ones are not being used.
  • Manually check your theme and plugin files: If you are comfortable with coding, you can manually check your theme and plugin files to see which scripts are being loaded. Look for any scripts that are not being used and remove them from the code.

How to Remove Unused Javascript from Your WordPress Site

Once you have identified the unused javascript on your website, it’s time to remove it. Here are the steps you can follow to remove unused javascript from your WordPress site:

1. Deactivate Unused Plugins and Themes

Deactivate plugins

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The first step is to deactivate any plugins and themes that you are not using on your website. This will prevent their scripts from being loaded on your site, reducing the amount of unused javascript.

2. Use a Plugin to Remove Unused Javascript

As mentioned earlier, there are several plugins available that can help you remove unused javascript from your WordPress site. These plugins work by scanning your website and identifying which scripts are not being used. They then give you the option to remove these scripts from your site.

Some of the popular plugins for removing unused javascript include Asset CleanUp, WP Asset CleanUp, and WP Rocket. These plugins also have additional features that can help improve your website’s performance, such as minification and lazy loading.

3. Manually Remove Unused Javascript

If you are comfortable with coding, you can manually remove unused javascript from your website. This involves going through your theme and plugin files and removing any scripts that are not being used. It’s essential to be careful when doing this, as removing the wrong script can break your website’s functionality.

Best Practices for Managing Unused Javascript

Here are some best practices to keep in mind when managing unused javascript on your WordPress site:

  • Regularly audit your website: It’s a good idea to regularly audit your website and remove any unused plugins and themes. This will help keep your site lean and improve its performance.
  • Use a caching plugin: A caching plugin can help improve your website’s performance by storing a static version of your site’s pages. This reduces the amount of code that needs to be loaded when a user visits your site.
  • Keep your plugins and themes up to date: Outdated plugins and themes can contain unused javascript that can slow down your website. Make sure to keep all your plugins and themes up to date to avoid this issue.
  • Use a lightweight theme: Some themes are more bloated than others, meaning they contain more code than necessary. Consider using a lightweight theme to reduce the amount of unused javascript on your site.

Conclusion

Unused javascript can significantly impact your website’s performance and user experience. By regularly auditing your site and removing any unused scripts, you can improve your site’s loading time and reduce the risk of conflicts and errors. Consider using a plugin or manually removing unused javascript to keep your website running smoothly.

Moadood Ahmad

About the Author: Moadood Ahmad

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