Observed arrival · 2026-10-28
Debug React’s bug-and-review drills
An account-free set of interactive React debugging exercises for practicing fixes and explaining your reasoning.
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ƒJS
- For
- React developers and technical interview candidates
- Worth noticing
- Exercises ask learners to assess another fix after making their own, with checks withheld until they decide whether it works.
Field notes
The exercise list is organized around async, effects, state, rendering, and events, with each scenario estimated at roughly 20–25 minutes. The page asks learners to work without AI assistance, then evaluate a second proposed fix before the checks reveal whether it works; progress is described as saved in the browser.
Observed signals
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○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
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