Warning: isMounted(…) is deprecated in plain Javascript Classes

Question

I am implementing 2 screens using react-navigation. But I got the warning below while navigating to the second page:

Warning: isMounted(...) is deprec

Answer 1

If you are using EXPO for RN development then this issue is now fixed in expo 27.0.2.

See https://forums.expo.io/t/warnings-after-upgrade-to-expo-27/9579/12