Drupal 8 Tip: Debugging JavaScript error "Uncaught ReferenceError: Drupal is not defined"

Megan's picture

She has: 11,419 posts

Joined: Jun 1999

Is your jQuery not working when logged out in Drupal 8? Are you getting a console error "Uncaught ReferenceError: Drupal is not defined"? In order to use jQuery behaviours in Drupal 8 you need to include core/drupal as well as core/jquery in your libraries file. Like this:

  dependencies:
    - core/drupal
    - core/jquery

See here for a little more explanation of JavaScript behaviours in Drupal 8: http://sqndr.github.io/d8-theming-guide/javascript/behaviors.html

They have: 66 posts

Joined: Jan 2016

Thanks for the tip. Now I know why I have those errors in my Drupal application.

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