Signals gotchas

signals.md

from https://x.com/_developit/status/1722346883568357856?s=20

1. Untracked function untracked(fn) { computed(fn).peek()}
2. flushSync - read signal value to run all dependent effects
3. Bump function bump (s) {let _ = s.value; s.value = undefined; s.value = _ }