BrushBefore Quick revision. Clear recall. Better interviews.
Back to search

Data fetching, async cleanup, and subscriptions with useEffect

useEffect is a common place for data fetching and subscriptions, but async work must be cleaned up carefully to avoid races and leaks.

React Hard Theory

Data fetching, async cleanup, and subscriptions with useEffect

useEffect is a common place for data fetching and subscriptions, but async work must be cleaned up carefully to avoid races and leaks.

  • Track loading and error states
  • Avoid updating unmounted components
  • Cleanup matters for listeners, sockets, and in-flight work
#data-fetching #hooks #react

Data fetching, async cleanup, and subscriptions with useEffect