Build a Markdown Previewer - Marked JS ignoring markup

Tell us what’s happening:
I’m working on the Markdown Previewer, and everything looks to be going well, except that Marked JS isn’t parsing the markdown in my editor. If I set “pedantic” to true, it works for standard markdown but fails to parse GitHub markdown.

I don’t see anything the reference CodePen is doing that looks like it’d affect this issue.

UPDATE My placeholder text didn’t have a space after formatting wildcards. I’ve solved it.

Your code so far

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

Link to the challenge:

In the example, the CSS rules do that job not the js itself. Under the // MARKDOWN STYLES you’ll see the css rules to style them