Debugging with Flask and Javascript

I have a python / Flask project and have started to use Pycharm Professional edition as I want to start using Javascript as well.  However, I am having issue debugging the javascript code.  I can pull up the debugger for the .html file that contains javascript as well, but then the webpage does not render fully so I can't enter values into the fields to run through the code.  If I start with the the app.py, then I don't seem to be able to have any of the console.log statements be executed.  How do I both run the Flask app and debug javascript at the same time?