Explore Playgrounds

Pub/sub in ~20 lines: on, off, once, emit.

Run async tasks with a max in-flight cap — like p-limit, in 12 lines.

Three array utilities you reach for weekly.

AbortController-based timeout plus exponential-backoff retry.

Use structuredClone for cycles, dates, maps, sets, and typed arrays.

Classic rate-limiting helpers for input handlers and scroll listeners.