emoji symbols not supported

Created by: runarberg

Using mml-chtml emoji symbols in MathML input won’t translate into typeset chtml.

See screenshot below from https://runarberg.github.io/mathup if you turn the MathJax polyfill on and scroll down to the reference section on identifiers you will see this:

However with native MathML rendering this is what you see:

I suspect this is because typesetting iterates over each UTF-16 char code as opposed to UTF-8 character.