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I'm figuring out the ins and outs of WordPress. I know that WordPress sets some default filters and actions in /wp-includes/default-filters.php, but where does it register its scripts like jQuery? We are all able to set jQuery as a dependency or just enqueue it in our themes, but where does WordPress register it?

Any help would be much appreciated!

  • why does it matter (unless you just want to understand the internals)? – Mark Kaplun Apr 14 '16 at 8:22
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    Indeed, I just want to understand how WordPress works. :) – SomeCode Apr 14 '16 at 8:24
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WordPress registers jQuery in the wp_default_scripts() function, which is found in wp-includes/script-loader.php.

// jQuery
$scripts->add( 'jquery', false, array( 'jquery-core', 'jquery-migrate' ), '1.11.3' );
$scripts->add( 'jquery-core', '/wp-includes/js/jquery/jquery.js', array(), '1.11.3' );
$scripts->add( 'jquery-migrate', "/wp-includes/js/jquery/jquery-migrate$suffix.js", array(), '1.2.1' );
  • Awesome! That's exactly what I was looking for. Thanks a lot! – SomeCode Apr 14 '16 at 8:46

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