Why is $(document).ready not firing for me?

Question

In a php file i have used include to include the following js.php file and prior to that i have included the jquery file.

<script type="text/javascript">  $(document).ready(function(){      alert("hello"); }); </script> 

But it doesn't work. Why? when I skip the $(document).ready function it works.

But i need jquery code inside. what is wrong?

Answer 1

The most likely answer, based on what you have said, is that the core jQuery file is not actually included correctly in the page. You need something like:

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script> 

Chances are, this is missing or typed incorrectly.

Answer 2

Another cause that will silently fail, and all remaining callbacks never called:

$(document).ready(null); 

So check if you have variables or syntax errors that return null. Like this one:

$(document).ready(function($){}(jQuery)); 

Notice that the function above is called instantly and undefined is returned.