To properly enqueue scripts in the WordPress admin for a widget, you will need to follow these steps:

  1. Create a function to register and enqueue the script. This function should include the wp_enqueue_script() function, which registers and enqueues the script. The wp_enqueue_script() function should be called within the wp_enqueue_scripts action hook, which is the proper hook to use when enqueuing scripts in the WordPress admin.
  2. In the wp_enqueue_script() function, you will need to provide the following arguments:
  • $handle: This is a unique identifier for the script. It should be a lowercase string, and it is recommended to use a prefix to avoid conflicts with other scripts.
  • $src: This is the URL of the script file. You can use a relative URL, or you can use the plugins_url() function to get the URL of the plugin directory.
  • $deps: This is an optional array of script handles that the current script depends on. If the current script depends on other scripts, you should list their handles here so that they will be loaded before the current script.
  • $ver: This is an optional version number for the script. It is recommended to include a version number to ensure that the latest version of the script is always loaded.
  • $in_footer: This is an optional argument that specifies whether the script should be loaded in the footer (at the bottom of the page) or the header (at the top of the page).
  1. Add the function you created in step 1 to the wp_enqueue_scripts action hook using the add_action() function.

Here is an example of a function that registers and enqueues a script in the WordPress admin for a widget:

function wp_enqueue_admin_scripts() {
  wp_enqueue_script( 'admin-widget-script', plugins_url( 'admin-widget-script.js', __FILE__ ), array( 'jquery' ), '1.0.0', true );
}
add_action( 'wp_enqueue_scripts', 'wp_enqueue_admin_scripts' );

This function will register and enqueue the admin-widget-script.js script, which is located in the plugin directory. The script depends on the jquery script, and it will be loaded in the footer of the page.

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