"edit" URLs for .js files

[michaelsbradleyjr]

In the Jupyter front-end, I can use New -> Text File and give the file a name which has a .js extension, edit and then save it. If I navigate away from the editor, the URL to that file looks like:

http://localhost:8888/files/mydir/myfile.js

And when I click it, the file is served up raw, rather than it being opened in the editor. But the URL to, say, a python file looks like:

http://localhost:8888/edit/mydir/myfile.py

Note the files segment in the first URL vs the edit segment in the second one. If I manually load the URL to the .js file, changing files to edit, then it is opened in the editor as desired.

A workaround is to name my JavaScript files, which I want to edit in the Jupyter front-end, with a different extensing, e.g. .javascript. But that's not so great.

[Carreau]

Oops. Thanks, we;ll try to fix that in a 4.2

@captainsafia , @parleur want to give it a try ? I know you did poke around the JS not so long ago.

[Carreau]

(marking as sprint-friendly, but not sure if it's really is)