Communicate Javascript console output via Python logging

[Archmonger]

Current Situation

Javascript warnings and exceptions are currently not visible within the Python console. This feels fairly fragmented, as Python developers won't expect to check the client side console for warnings/errors.

Proposed Actions

By using our new messaging schema, all client-sided console output should be redirected to the server and logged the within the Python console.

This should only occur when ReactPy is in debug mode.

Related:

• Setting REACTPY_DEBUG_MODE=1 should turn on client-side debug mode #346

[rmorshea]

As noted in the linked comment, the messaging scheme (as it stands today) only anticipates a message routing system. It would be useful to write up a task for actually implementing that routing system since this issue would depend upon it.

[Archmonger]

@rmorshea This issue has reminded me that we probably want to flesh this out soon.

It's currently confusing to new users that class is class_name, especially given that there's zero server side indication of such.

[rmorshea]

Yup. I actually completely forgot about that.