[yaysyu]

This reminds me of a very similar product, QuokkaJs [0] which works across many popular editors, VSCode, Atom, Sublime, Jetbrains suite.

[0] https://quokkajs.com/

[petercooper]

https://runjs.app/ is also another player in this area, though is its own editor.

[throwaway888abc]

Happy long time RunJs user. Super useful and battle tested for quick prototypes. Sunflower looks interesting too.