Why is jQuery UI toggle not working in my theme? I've tried setting up a jQuery toggle menu without much success. I followed the exact instructions and code from this tutorial, but even this simple script is not working. 

Regular JS (like an alert) seems to work fine. I have Views installed and it seems the views admin uses extensive jQuery and works fine. Is there something I have to do to enable jQuery on my theme?
jQuery is added by Drupal core and is available globally.

Clear cache at Admin > Config > Performance 

Check your script.js has been added to the html source.