exam

Q19. When do you use useLayoutEffect?
[ ] to optimize for all devices
[ ] to complete the update
[ ] to change the layout of the screen
[x] when you need the browser to paint before the effect runs

Although the fourth option is checked, this is what I've found on web about useLayoutEffect which is completely against the checked option:

Updates scheduled inside useLayoutEffect will be flu

根据学生错题情况展开针对性加强教育。