I start with a REPL. Otherwise I have been writing JavaScript long and have enough supporting Node libraries to do just about anything that I can prototype pre

I start with a REPL. Otherwise I have been writing JavaScript long and have enough supporting Node libraries to do just about anything that I can prototype pretty fast. I don’t normally use frameworks and I especially wouldn’t use a front end framework for prototyping because I would spend time unraveling framework nonsense than testing the actual idea.