sorry I tested with NaN here, and now the counter is dead

I suppose that a sanity check with isFinite would be useful :^)

Ha nice, I'll add a clear button

And an isFinite check :)

NaN as zombie is great. Hahaha

And Infinity. What’s Infinity + -Infinity?

Very excited about this! I forked your notebook and gave it a try. First time I really "groked" a back end service for Observable! https://observablehq.com/@triptych/testing-convex

🎉