Скачать или смотреть How to Properly Add a JS File in a WordPress Block Child Theme

Learn how to correctly attach a JavaScript file in a WordPress block child theme. Troubleshooting common issues like 404 errors when the JS file is not found.
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This video is based on the question https://stackoverflow.com/q/73443628/ asked by the user 'Marcin Dawid' ( https://stackoverflow.com/u/17253906/ ) and on the answer https://stackoverflow.com/a/73443803/ provided by the user 'Vinay Jain' ( https://stackoverflow.com/u/17995563/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Adding a JS File in a WordPress Block Child Theme

Creating a WordPress block child theme is a great way to customize your site's appearance and functionality without losing the ability to update the parent theme. However, when working with JavaScript files, you might run into issues like 404 errors if your script is not loading correctly. In this post, we’ll walk through how to properly include a JavaScript file in your child theme and resolve common pitfalls.

The Issue: 404 Error for JS File

While developing your WordPress child's theme, you might notice your browser's console showing a 404 error, indicating that your JavaScript file is not found. The problem arises when the path used in your code points to the parent theme instead of the child theme. Here’s a breakdown of how you can troubleshoot and fix this issue.

Example of the Problematic Code

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

In this line, get_template_directory_uri() retrieves the URL of the parent theme, which is not where your JavaScript file is stored. This leads to the 404 error as the file isn't found at that location.

The Solution: Correctly Enqueueing the JS File

To correctly enqueue your JavaScript file from the child theme, you need to use get_stylesheet_directory_uri(), which points specifically to the child theme's URL. Here’s how to update your existing code:

Updated Code

Replace the previous line of code with the following:

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

Code Breakdown

get_stylesheet_directory_uri(): This function retrieves the URL for the current theme, which will be the child theme if one is activated. This is essential for ensuring your child theme’s assets are loaded correctly.

'/script.js': This is the relative path to your JavaScript file within your child theme folder.

array( 'jquery' ): This parameter lists any dependencies needed before your script runs. If your script relies on jQuery, it's a good practice to declare it as a dependency.

'', true: The first empty string is for the version number (optional), and the last parameter set to true means your JavaScript file will be loaded just before the closing </body> tag for better performance.

Additional Considerations

Ensure your JavaScript file is named correctly and is indeed present in the child theme directory.

You can include custom CSS in a similar way using the wp_enqueue_style() function.

Don’t forget to clear your browser cache or refresh to see the changes after making updates to your code.

Conclusion

By replacing get_template_directory_uri() with get_stylesheet_directory_uri(), you can resolve the 404 error that occurs when trying to load a JavaScript file in your WordPress block child theme. This simple adjustment ensures that your custom files are loaded from the child theme rather than the parent theme, allowing for smooth development and customization.

If you continue to experience issues, double-check your file paths and ensure there are no typos in your code. Happy theming!