Mahrud Sayrafi

@jcudit @parkr do you have any thoughts on whether this contribution is acceptable or not?

@stevenkaras, any progress on this? I also prefer allowing `katex` as an option so clients don't need to have javascript enabled, but if it requires a lengthy audit of that...

That sounds reasonable. I don't have access to this PR, so opened a new one off of master with your requested changes.

This would be very useful if selecting part of a diagram was made easier, for instance using ctrl-click or shift-click-drag. The ability to cut (or just delete) would be great...

I particularly like being about to look at multiple diagrams at once, say multiple pages of a spectral sequence. Would canvases be visible side by side? I imagine it would...

What steps would be required for doing this?

The interrupt mechanism in the interpreter is pretty complicated, so I doubt this will be easy to do for a volunteer. The relevant code is in `evaluate.d` and the most...

Same with this: (which is a strange error, by the way) ```m2 i1 : h = new MutableHashTable from {}; i2 : (h#0, h#1) = (0, 1); stdio:2:3:(3): error: syntax...

It seems like there are many other functionality related to Weyl algebra and Skew commuting rings that has fallen through the cracks: ```m2 i1 : W = QQ[x, y, dy,...

Similarly, an error like this: ```m2 ../../Macaulay2/m2/debugging.m2:23:6:(1):[7]: error: expected all degrees to have length 1 ../../Macaulay2/m2/debugging.m2:23:6:(1):[7]: --entering debugger (type help to see debugger commands) ../../Macaulay2/m2/debugging.m2:23:6-23:27: --source code: olderror processArgs args)...