Code QuizIntermediate

Blur Overlay in App Switcher

Finding why a privacy overlay never hides sensitive content in the background.

Codejavascript

import { AppState } from 'react-native';

function usePrivacyOverlay(setBlurred) {
  useEffect(() => {
    const sub = AppState.addEventListener('change', (state) => {
      if (state === 'active') {
        setBlurred(true);
      } else {
        setBlurred(false);
      }
    });
    return () => sub.remove();
  }, []);
}

What is the bug in this app-switcher privacy code?

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