[feniv]

Is the browser editing powered by Monaco or something else entirely? https://github.com/microsoft/monaco-editor

Both repl.it and codesandbox.io seem to be Monaco based. This seems to have better support for VS Code extensions than what's available in Monaco.

[JoyrexJ9]

It's not Monaco, which is a basic text editor, it's full VS Code (extensions, terminal, debugging) but in the browser