I'm currently making heavy use of p5.js's web editor—it's nice to have something easy to pick up, even if it's limiting in the long run, as setting up development environments on arbitrary student machines is a pain.
Ideally, I'd love to move to some sort of self-hosted web-based IDE, so I can ensure that everybody is logged in and has autosaves enabled (...many a project have been lost to infinite for loops and similar gremlin 😅).