WordPress Localize Script Example

wordpress-localize-script.php

<?php

add_action( 'wp_enqueue_scripts', 'add_localized_js_data' );

function add_localized_js_data() {
 
  wp_enqueue_script( 'my-frontend-script-handle', 'url to my frontend Javascript', array( 'jquery' ) );
 
  $data = array(
    'ajax_url' = admin_url( 'admin-ajax.php' ),
    );
  
  wp_localize_script( 'my-frontend-script-handle, 'My_Frontend_Data', $data );
  
  /*
  
  Now in your frontend Javascript code, you can access My_Frontend_Data.ajax_url to
  get the URL to admin-ajax.
  
  */
  
}