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Unlock the Power of Custom JavaScript: A Step-by-Step Guide to Enhancing Your WordPress Site


Adding custom JavaScript to your WordPress site can help you enhance its functionality, improve user experience, and customize it according to your requirements. In this article, we will guide you through the process of adding custom JavaScript to your WordPress site using various methods.

Method 1: Using the functions.php File

The first method to add custom JavaScript to your WordPress site is by adding it to the functions.php file of your active theme. To do this, follow the steps below:

  1. Access your WordPress site’s files using an FTP client or the File Manager in your web hosting control panel.
  2. Navigate to the folder containing your active theme (usually located in /wp-content/themes/).
  3. Find and open the functions.php file in your theme’s folder.
  4. Add the following code snippet to the end of the file:
function my_custom_scripts() {
    wp_enqueue_script( 'custom-js', get_stylesheet_directory_uri() . '/js/custom.js', array( 'jquery' ), '1.0.0', true );
add_action( 'wp_enqueue_scripts', 'my_custom_scripts' );

This code creates a new function, my_custom_scripts(), which enqueues a custom JavaScript file (custom.js) located in your theme’s /js/ folder. If your theme doesn’t have a /js/ folder, create one and upload your custom.js file there. Replace ‘custom-js’ and ‘1.0.0’ with your handle and version number, respectively.

Method 2: Using a Plugin

If you don’t want to edit your theme’s files directly, you can use a plugin to add custom JavaScript to your WordPress site. One such plugin is the Simple Custom CSS and JS plugin. To use this plugin, follow the steps below:

  1. Install and activate the Simple Custom CSS and JS plugin from the WordPress plugin repository.
  2. Go to your WordPress admin dashboard and navigate to the “Custom CSS & JS” menu item.
  3. Click on “Add Custom JS” to create a new JavaScript snippet.
  4. Enter a title for your custom JavaScript and add your code to the editor.
  5. Save your changes by clicking on the “Publish” button.

Your custom JavaScript will now be added to your WordPress site.

Method 3: Adding JavaScript Directly to a Page or Post

If you only need to add custom JavaScript to a specific page or post, you can do this by directly adding it to the page or post using the WordPress editor. To do this, follow the steps below:

  1. Edit the page or post where you want to add custom JavaScript.
  2. Add a new HTML block to the page or post editor by clicking on the “+” icon and selecting “HTML.”
  3. Add your custom JavaScript code within <script> tags inside the HTML block:
// Your custom JavaScript code here

Save your changes by clicking on the “Update” button.


In this article, we have discussed three methods to add custom JavaScript to your WordPress site. You can choose the method that best suits your needs and requirements. Adding custom JavaScript can help you create a more engaging and interactive website, providing a better experience for your users.

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