let PageDown and MathJax work together

Question

I am implementing a UI which is supposed to look pretty much like the one on math.stackexchange.com:

1. Using fancy Markdown like you are used to on stackoverflow

Answer 1

I've created a basic example for how to get Pagedown and MathJax working together using a slight modification of Stack Exchange's mathjax-editing.js.

Stack Exchange's code is based on Davide Cervone's, see his comment on another answer.

The code for the example can be viewed on github.