React · Senior · Question 75 of 75

Why are error boundaries still written as classes (or provided by a library)?

✓Correct answer: Catching render errors requires componentDidCatch/getDerivedStateFromError, which have no hook equivalents yet
2Classes render faster
3Function components can't render fallback UI

Explanation

Most teams write one reusable boundary (or use react-error-boundary) and place it around routes and independent widgets.

Further reading

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