Help with last exercise in Ruby on Rails course: Javascript-based navigation menu


I have reached the last exercise in the Ruby on Rails course and I am stuck at step 9:

At this step, you have to use javascript to create a navigation menu that slides out from the left side. I have tried to implement the sidr plugin (Sidr | Berriart) but it is not working.

If anyone has been successful in implementing this step it would be great if you could share the code (maybe a link to Github) or screenshots of the most vital pages:





Thanks !