Arno Gourdol

The issue seems to be that since the denominator is empty, you're actually not clicking on it, but on an adjacent node, therefore leaving the denominator, and causing the placeholder...

I think the fundamental problem is that an empty box has a width of 0. Therefore, it cannot be selected. I have changed the way placeholder works by making them...

The behavior has now changed to allow empty numerator or denominator. However, if both are empty the fraction itself is removed. There is still the issue that the numerator and...

I think it's reasonable that in this case once the "row" has been deleted, you get back "(a)" (i.e. no longer a vector).

@yorologo good catch! That sounds like a different issue, though. Do you want me to open a new issue or would you rather do it?

Issue #654 tracks the ASCIIMath problem

> When a user wants to turn the term (a+b+c+d) into (a+b)+(c+d), they often try to insert a ) after the b and a ( just before the c. Just...

That's an interesting problem. I'd need to give some thoughts about a possible solution, unless someone has some suggestion...

This is a known limitation. I intend to resolve it by allowing the input of "rules" for the generation of the MathJSON, so you could specify which symbols should be...

It's high on the list. Something I want to make some progress on in the next few weeks. I do have a pretty good idea of what I want to...