Browser incompatabilities

[gabriellesc]

Port of TAPP issue #190: uoft-tapp/tapp#190

@lloyd-uot-cs:

Firefox on Windows non-admin account can delete instructors,
but don't get the cursor to type in replacements. Firefox on Windows
admin account works fine

Internet Explorer doesn't work as admin or non-admin

@gabriellesc:

@lloyd-uot-cs Might this have been resolved subsequent to #174?

@lloyd-uot-cs:

You're right! I did a git pull on my test machine and Firefox works now,
but Internet Explorer still has problems with the site...

The IE debugger console says: Error SCRIPT5009: 'fetch' is undefined
File: app-8dacd81794b2a8e58520.js, Line: 1, Column: 109240

Not really sure if that is what's wrong.

@gabriellesc:

@lloyd-uot-cs Is there a way to set up a development/testing environment on my machine with IE? ...Is there even a point supporting IE now that it's being replaced with Edge?

[gabriellesc]

@lloyd-uot-cs we use the fetch API, which is not supported at all by IE: https://developer.mozilla.org/en/docs/Web/API/Fetch_API#Browser_compatibility
However, it is supported by every other browser including Edge.
It might be worth adding a message somewhere that the site is not compatible with IE?

[gabriellesc]

W.r.t. the fetch API, see https://github.com/uoft-tapp/tapp-cp/wiki/Summer2017PostMortem#some-dogs-wont-fetch and https://github.com/uoft-tapp/tapp-cp/wiki/Summer2017PostMortemComments

I'm not sure if there are any other polyfills that we would need?

It might also be worthwhile checking the CSS rendering on browsers other than Chrome (where development happened) and making quick changes if necessary.
(eg. this change was added for compatibility with FF).