RunKit looks great, and upon finding it I quickly went to work putting together a little React.js demo for some colleagues based on the One More Thing… notebook—but it’s slow!
Truly, taking couple seconds for a round-trip to the server is totally reasonable. I don’t fault RunKit at all for that. But the code I wrote doesn’t need to run on the server, so I wish I could toggle an option to run it in the reader’s browser instead. As a bonus, it would reduce load on RunKit’s servers.
I’m sure it’s something that would be nontrivial to implement, and would take some UX finesse since certain features wouldn’t work in browser mode and that has to be explained to the user somehow, but I hope it’s a feature you’ll consider making.
Thanks for your hard work.