[rendall]

As an aside, I'm on mobile and tried to visit the TypeScript playground to play around with this, but weirdly, the default code is an implementation of FizzBuzz! There was not an obvious way to clear it to get a blank editor. Even "select all" context menu was hijacked. So I gave up. I'll have to file an issue.

[eyelidlessness]

What I do is delete all but a few characters after “code” in the URL, then reload to get an empty playground. It’s annoying but it works.