Is there a way to write sqcases syntax.

[SPY-LY]

I'm writing my conspectus in KaTeX and for specific reasons I need to write sqcases syntax, but I can't find a way to write it. So, is it supported some other way or will it be supported soon?

[edemaine]

Reading the code for cases, something like this works pretty well:

\def\arraystretch{1.2}
A=\left[\begin{array}{ll}
1 & \text{if } x=y\\
0 & \text{otherwise}
\end{array}\right.

(Maybe you also want a \quad between the columns...)

Assuming sqcases is in a LaTeX package (is it?), it might make sense to add support to KaTeX, and it should be pretty easy by following the linked code for cases.