How do I remove unused JavaScript from WordPress site?

Go to “Asset CleanUp > Settings” menu and then to “Plugin Usage Preferences” tab. Here you can decide, the way you want to view and disable the unused CSS / scripts on your pages. Manage in the Dashboard – enable this option. This will help you to analyze the page from the post editor within the admin dashboard.

How do I reduce unused JavaScript in WordPress?

9. Remove Unused JavaScript With Asset Unloading Plugins

  1. Step 1: Install Asset CleanUp or Perfmatters.
  2. Step 2: Enable “Test Mode” if using Asset CleanUp.
  3. Step 3: Enable the script manager if using Perfmatters.
  4. Step 4: Disable specific JavaScript files where they don’t need to load.

How do I remove JavaScript from WordPress?

How to Remove Unused CSS JS Files in WordPress

  1. See what scripts are getting loaded on our site. In order to remove unused scripts, we should first find out what exactly gets loaded by the WordPress theme and plugins. …
  2. List all loaded scripts with wp_enqueue_script. …
  3. Remove unused CSS JS files in WordPress. …
  4. The entire plugin.

How do I find unused JS in WordPress?

Finding Unused JS via PageSpeed Insights

Go to the Opportunities section and look for “Remove unused JavaScript”. Here, you’ll find if and what JS resources are affecting your site’s performance. In the example below, the JS script is related to Google Tag Manager.

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How do I remove unused JavaScript?

Unminify JavaScript and CSS in your browser

  1. Open Chrome DevTools. Control + Shift + I. …
  2. Open the Command Menu. Control + Shif t +P. …
  3. Type + click the following: “Show Coverage”
  4. Click the reload button to reload the page and to see which code is loaded.
  5. Then double click on the JS or CSS file that you want to unminify.

How do you minify JavaScript?

To minify JavaScript, try UglifyJS. The Closure Compiler is also very effective. You can create a build process that uses these tools to minify and rename the development files and save them to a production directory.

How do I clean up JavaScript?

In this article, the focus will be on JavaScript, but the principles can be applied to other programming languages.

  1. Strong type checks. Use === instead of ==
  2. Variables. Name your variables in a way that they reveal the intention behind it. …
  3. Functions. …
  4. Conditionals. …
  5. ES Classes. …
  6. Avoid Using Eval. …
  7. Use JSLint. …
  8. Avoid In General.

What is reduce unused JavaScript?

Reducing unused JavaScript can reduce render-blocking behaviour to speed up your page load and improve your visitors’ page experience. By default, JavaScript files are render-blocking because they block the browser from dealing with other page load tasks, thus delaying your page’s First Paint.

Can I delete JavaScript files?

You can’t delete a file when running JavaScript from the browser, but you can do it when running JavaScript from a server environment like NodeJS. When you need to delete a file using NodeJS, You can use the fs. unlink() or fs. … Then you can start using the methods to delete your file.

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How do I deregister a WordPress script?

Dequeue and deregister it

function deregister_isotope() { wp_dequeue_script( ‘jquery-isotope’ ); wp_deregister_script( ‘jquery-isotope’ ); } add_action( ‘wp_print_scripts’, ‘deregister_isotope’ );