Function handleRetriesFor

A wrapper for actions that may be asynchronous. This will rerun the action after the asychronous action completes. Usually, this is for dynamic loading of files. Legacy MathJax does that a lot, so we still need it for now, but may be able to go without it in the future.

Example:

HandleRetriesFor(() => {

    html.findMath()
        .compile()
        .getMetrics()
        .typeset()
        .updateDocument();

}).catch(err => {
  console.log(err.message);
});