Looks great! Will KaTeX support (c.q. integrate with) ASCIIMathML.js¹,²? AsciiMath is dubbed “TeX without backslashes”, or as “markdown for math”.³ (La)TeX input can become laborious, and the syntax gets difficultly readable, very rapidly.

With AsciiMath syntax⁴ (and Unicode!⁵) you can write δA instead of `\delta A`, ½ instead of `\frac{1}{2}`, ((a,b),(c,d)) instead of `\begin{pmatrix}a & b \\ c & d \end{pmatrix}`, &c.

¹ http://en.wikipedia.org/wiki/ASCIIMathML ² http://www.asciimath.org ³ http://boolesrings.org/krautzberger/2014/08/10/asciimathml-t... ⁴ http://www1.chapman.edu/~jipsen/mathml/asciimathsyntax.html ⁵ http://www.johndcook.com/math_symbols.html