BFE
.dev
buy us
a coffee
EN
Practice
Explore
EN
React Quizzes
Test your knowledge of React quirks.
Sort
Difficulty
Solved status
Sort: most tried
1. React re-render 1
React
medium
19940 tried
22. useState()
React
Hooks
hard?
8627 tried
4. React re-render 4
React
medium
8350 tried
12. useEffect
React
medium
7721 tried
2. React re-render 2 - memo()
React
easy
7580 tried
13. useRef
React
Hooks
medium
6720 tried
3. React re-render 3
React
easy
6194 tried
6. React re-render 5 - context
React
medium
5951 tried
10. useLayoutEffect()
React
Hooks
medium
5115 tried
5. Automatic batching 1
React
medium
5083 tried
7. Suspense 1
React
medium
4783 tried
9. React re-render 6 - Context
React
easy
3812 tried
8. Suspense 2
React
medium
3667 tried
15. memo 2
React
easy
3544 tried
16. event callback
React
Hooks
easy
3528 tried
17. flushSync()
React
Hooks
medium
3403 tried
14. async event handler
React
medium
3397 tried
19. lazy initial state
React
Hooks
medium
3215 tried
11. callback props
React
easy
3197 tried
18. useRef 2
React
Hooks
medium
3015 tried
29. useEffect() timing IV
React
Hooks
medium
2960 tried
21. useEffect() II
React
Hooks
medium
2126 tried
20. Error Boundary
React
medium
1851 tried
26. useEffect() III
React
Hooks
medium
1749 tried
24. useEffect() timing
React
Hooks
medium
1509 tried
27. useEffect() timing II
React
Hooks
easy
1132 tried
23. Suspense 3
React
Hooks
medium
1055 tried
28. useEffect() timing III
React
Hooks
medium
1041 tried
25. all kinds of effects
React
Hooks
medium
945 tried