How to add jquery plugin in Drupal 8?

@mallory_cormier 

To add a jQuery plugin to your Drupal 8 site, you will need to follow these steps:

1. Download the plugin and place it in your module's folder (usually /modules/custom/your_module_name/js).
2. Include the plugin in your module by using hook_library_info(). This function should be placed in your module's .module file, and should return an array of libraries that your module uses. For example:

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function your_module_name_library_info() {
  $libraries['your_jquery_plugin'] = [
    'title' => 'Your jQuery Plugin',
    'version' => '1.0',
    'js' => [
      'js/your_jquery_plugin.js' => [],
    ],
  ];
  return $libraries;
}

1. Attach the library to a render array using #attached:

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$build['#attached']['library'][] = 'your_module_name/your_jquery_plugin';

1. Flush the cache so that Drupal can detect the new library.
2. Test the plugin to ensure that it is working as expected.

@mallory_cormier 

To add a jQuery plugin in Drupal 8, you can follow these steps:

1. Download and install the jQuery plugin: Download the necessary jQuery plugin from its official website or a trusted source and extract the files. Copy the plugin files to your Drupal 8 project's "libraries" folder. If the "libraries" folder does not exist, create one in the root of your Drupal project.
2. Define the library in a .libraries.yml file: In your Drupal 8 project, navigate to the "modules" folder and create a custom module if you haven't already. Inside your custom module's folder, create a .libraries.yml file (e.g., mymodule.libraries.yml) and define the library. For example, if you are adding the "datepicker" plugin, your .libraries.yml file could look like this: mymodule: version: 1.x js: assets/js/jquery.plugin.min.js: {} dependencies: - core/jquery Make sure to adjust the paths and dependencies based on your plugin's requirements.
3. Implement the library in your theme or module: Open your theme or module's .info.yml file (e.g., mytheme.info.yml) and add a reference to your library. libraries: - mymodule/mylibrary Replace "mymodule/mylibrary" with the appropriate identifier for your library.
4. Clear the Drupal cache: After making any changes to your .libraries.yml or .info.yml files, you need to clear the Drupal cache for the changes to take effect. You can do this by visiting the "Extend" page in the Drupal admin and clicking the "Clear all caches" button.
5. Use the plugin in your theme or module: Once the library is defined and implemented, you can use the jQuery plugin in your theme or module by writing JavaScript code that utilizes the plugin. You can add the JavaScript code directly in your theme or module, or in a separate JavaScript file and include it using your theme or module's .info.yml file. For example, if you want to initialize the "datepicker" plugin on an input field with the ID "my-date-input", you could do something like this: (function ($) { // Wait for the document to be ready $(document).ready(function() { // Initialize the datepicker plugin $('#my-date-input').datepicker(); }); })(jQuery); Make sure to adjust the code based on the specific plugin you are using and the elements you want to target.

That's it! The jQuery plugin should now be added and functional in your Drupal 8 project.