Option to hide nbviewer

[paololazzari]

This has been discussed in the past (e.g. #922) and the "solution" was to hide the nbviewer bit if the preview url returned an error.

That doesn't seem to be working for me:

but even if it did, I'd still want to hide nbviewer. I don't need/want my users to see that.

I think something like this would be reasonable:

config:
  BinderHub: 
    hide_nbviewer: true

[paololazzari]

As a workaround, this seems to work:

config:
  BinderHub: 
    extra_footer_scripts:
      02-hidenbviewer: |
        document.addEventListener('DOMContentLoaded', function() {
          document.getElementsByClassName('row vh-100 mt-4 p-4 text-center')[0].style.visibility = 'hidden';
        });