DIDE is a Docs add-on that turns Docs into an IDE
Create a Google Apps script project and paste in the code!
I don't want to add it to the web store because It's not very polished, and lacks in general functionality.
- Preview HTML and run JS code.
- Instant Dark theme
- Won't intrude on your other Docs
- Allows exporting as a standalone file
With all that said it still lacks:
- Debugging
- Syntax Highlighting
It currently supports:
- JavaScript
- HTML