Why should not call setState in componentWillUnmount?

  • Because it will cause a memory leak
  • Because it will trigger a re-render after the component is unmounted
  • Because the component's state is no longer available after unmounting
  • Because it is unnecessary and can cause performance issues
The componentWillUnmount() method is called immediately before a component is unmounted and destroyed. It is not safe to call setState() within this method, as the component's state is no longer available after unmounting. Attempting to update the state after unmounting can cause errors or unexpected behavior in the application.
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