CodePen for live site 1-4 demo does not render JSX

Running

https://microsoft.github.io/frontend-bootcamp/step1-04/demo/

in Edge, Chrome and Firefox shows that the JSX is not rendered. Consider

<pre data-lang="babel">

or

<pre data-lang="typescript">

to load the appropriate pre-processor in codepen, or replace the JSX with React.createElement("div", null, "Hello World") to work with JS directly

wow, interesting. i'm sure it work in the past. Curious what codepen did. Oh well, I'll look into a fix. Happy to take a PR as well if you get to it first.

i could implement it