Is a SimpleMDE Markdown editor powerd by MarkJax parser.
To use it you need to include both SimpleMDE and MarkJax into your page:
<link rel="stylesheet" href="https://cdn.jsdelivr.net/simplemde/latest/simplemde.min.css">
<script src="https://cdn.jsdelivr.net/simplemde/latest/simplemde.min.js"></script>
<script type="text/javascript" src="https://codeassign.github.io/markjax/dist/markjax.min.js"></script>
and now when you create new SimpleMDE
object you need to specify custom previewRender
function which uses MarkJax:
var simplemde = new SimpleMDE({
previewRender: markjax
});