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

The answers above didn't work for me, but adding the following to index.js did the trick:

console.ignoreYellowBox = ['Warning: isMounted(...) is deprecated'];

Or upgrade to expo 27.0.2 which basically adds the above to Expo.js. See more information here: https://forums.expo.io/t/warnings-after-upgrade-to-expo-27/9579/10

As some of the other answers stated, it's a react-native issue so hopefully it will be fixed soon there and then in the following version of Expo.