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I wish to move jQuery to the bottom of the page on my theme, to speed up loading times.

Previously I was doing this by replacing it with Google's CDN version but I have been told that is a bad thing to do.

How can I deregister and re-register the WordPress jQuery script and move it to the bottom without causing any problems?

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    Why? Using Google’s jQuery will break many plugins, because it works differently. – fuxia♦ Mar 12 '13 at 9:39
  • Here is a post why loading jQuery from a CDN isn't a ´good´ idea. pippinsplugins.com/why-loading-your-own-jquery-is-irresponsible – Horttcore Mar 12 '13 at 9:40
  • OK I did not know about the problems with using Google's CDN. I will instead just move it to the footer. Thanks. – Shaun Mar 12 '13 at 9:42
  • This definitely has causing issue. I've received some complaints about this. It turns out optimize press theme is doing this...... – Jesse Mar 12 '13 at 9:47
  • OK guys I changed the question as I'm still not sure how to do this. – Shaun Mar 12 '13 at 9:47
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You can change it by calling add_data method of $wp_scripts object. This object holds all scripts and information how to render it. To force rendering script in the footer you can do it like this:

add_action( 'wp_enqueue_scripts', 'wpse8170_enqueue_scripts' );
function wpse8170_enqueue_scripts() {
    $GLOBALS["wp_scripts"]->add_data( 'jquery', 'group', 1 );
}

P.S.: I haven't tested it, but suppose it has to work.

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  • Just tried this, it caused the following error: Fatal error: Call to a member function add_data() on a non-object – Shaun Mar 12 '13 at 10:00
  • The latest edit by toscho stops the error coming up but also stops jQuery loading at all. – Shaun Mar 12 '13 at 11:20
  • @Shaun yes, sorry, forgot to call global $wp_scripts before adding data. – Eugene Manuilov Mar 12 '13 at 11:50

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