For me, opening Incognito Mode in Chrome let the browser show the recent changes in my
.js static files.
django-livereload-server python package provides a spiffy solution. Install it:
$ pip install django-livereload-server
MIDDLEWARE_CLASSES in settings.py.
$ ./manage.py livereload
before starting the runserver.
More documentation can be found at the django-livereload-server github site
I believe your browser is caching your js
you could power refresh your browser, or clear browser cache?
on chrome control+f5 or shift + f5
i believe on firefox it is control + shift + r