Support MathJax Extensions

[blue_emperor]

@WhiteNoise

We support all extensions that are bundled within the Mathjax distribution. I searched briefly and I haven’t found much outside the MathJax distribution. If they exist(?), they can be added with plugins through the API.

According to previous answer by WhiteNoise, MathJax extensions can be already added using the plugin API.

Currently you can get mhchem and bussproofs extensions using Extended MathJax community plugin. Using the same plugin you can use this preamble to get \oiint and \oiiint:

\newcommand{\oiint}{{\subset\!\supset} \mathllap{\iint}}
\newcommand{\oiiint}{{\Large{\subset\!\supset}} \mathllap{\iiint}}