The basic approach is to use the `document.querySelectorAll` to match certain elements, then manually set the display property to 'none' or 'block' (or 'inline-block') to hide or show it. Using the `match` method allows us to detect whether or not the sea...

If you ever want to render a partial but don't want an error thrown you can either check for the existence of the file first params[:controller]+"/sidebar" if File.exists?(RAILS_ROOT+"/app/views/"+params[:controller]+"/_sidebar.html.erb") %> or you ca...