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

Is is actually a React-Native issue

You can wait and check when a fix is available here: https://github.com/facebook/react-native/issues/18868

Or in the meantime you can hide the warning like suggested.