WordPress – registering a script depending on JQuery

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I register and enqueue my script like this: 

wp_register_script('api_script', plugins_url('api.js', __FILE__), array('jquery'));
wp_enqueue_script('api_script');

My api.js file consist only of a call to the $.ajax function :

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$.ajax({
    /*Stuff*/
});

However, I’m getting the following error: TypeError: $ is undefined.
Help please!

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1 comment

  1. When writing javascript with jQuery for WordPress you want to write “safe” jQuery functions by not using the dollar sign. You can use:

    jQuery.ajax({
   /*Stuff*/
});

    Or you can pass a dollar sign as a parameter like this:

    (function($) {
   $.ajax({
      /*Stuff*/
   });
 })(jQuery);

    And it then runs an anonymous function with a parameter passing the jQuery object.