jQuery included with WordPress is in compatibility mode. To avoid conflicts with other libraries we can not use the '$' shortcut for 'jQuery'.

To use the '$' sign we use:

jQuery(document).ready(function($) {
   $('#myid').css({'background': 'black', 'color':'white'});

This works. But my question is how to do the same with window load. I have been facing this problem since last few projects. So, thought better to make the concept clear.

jQuery(window).load(function($) {
   $('#myid').css({'background': 'black', 'color':'white'});

With this I get an error that says : "$ is not a function". So, I am unable to use $ inside of the window.load code block.

So, can anyone help how I can use the $ shortcut inside window.load?

2 Answers 2


Using a self invoking anonymous function that passes the jQuery object will do the trick:

     $('#myid').css({'background': 'black', 'color':'white'});
})(jQuery); //Passing the jQuery object as a first argument
  • 3
    Off-topic note: strictly speaking, this function isn't self-invoking - it doesn't invoke itself, it's you invoking it immediately after defining. Immediately-Invoked Function Expression is a better name IMO.
    – gronostaj
    Sep 27, 2016 at 14:21

This is because window load event is different than Jquery load function.

Note also this function can take multiple parameters.

(function(wordpress, $){ 
     var emoji = wordpress.emoji; 
     // do somehting with emoji ;)
     $('body').css({'background': 'black', 'color':'white'});
})(wp, jQuery);

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