What is useFocusEffect hook in React navigation?

The useFocusEffect is analogous to React's useEffect hook. The only difference is that it only runs if the screen is currently focused.

The useFocusEffect hook runs the effect as soon as the screen comes into focus. The effect will run whenever the dependencies passed to React.useCallback change, i.e. it'll run on the initial render (if the screen is focused) as well as on subsequent renders if the dependencies have changed.

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