In WordPress, including libraries from the node_modules directory in a plugin is not a standard practice, as it can lead to potential conflicts and make the plugin difficult to manage and maintain. WordPress follows a different approach for handling external libraries and dependencies.

Instead of directly including libraries from node_modules, you should consider the following options:

  1. Using CDN Links: Many popular libraries, such as jQuery, Bootstrap, and Font Awesome, have CDN (Content Delivery Network) links available. You can enqueue these external scripts and stylesheets using the built-in WordPress functions like wp_enqueue_script() and wp_enqueue_style().

  2. Including Libraries Directly: If the library you need is relatively small and doesn't change frequently, you can include the necessary files directly in your plugin's directory. This way, you can ship the plugin with the required files, and they won't depend on the user's node_modules.

  3. Using Composer for PHP Libraries: If your plugin requires PHP libraries, you can use Composer (a PHP package manager) to manage those dependencies. This is a common practice in WordPress development, and there are plugins available that can help you include Composer packages in your WordPress plugin.

  4. Creating a Custom Plugin Package: If your plugin is intended for distribution and requires specific dependencies, you could package those dependencies together with your plugin. Users can then install the plugin along with its packaged dependencies as a single package.

  5. Writing Custom Code: If you need a specific functionality that isn't covered by existing libraries, consider writing custom code to fulfill the requirements. This way, you can avoid introducing unnecessary dependencies.

If you absolutely must include a library from node_modules, you can try using a build tool like Webpack to bundle the necessary files into a single file and enqueue that in your WordPress plugin. However, this approach should be handled with caution, and you need to ensure that there are no licensing or security issues associated with bundling third-party libraries.

Remember that WordPress has its own ecosystem and best practices, so try to adhere to them as much as possible to ensure compatibility and ease of use for your plugin's users.

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