How to perfect fix isMounted(…) warnings in react-native not to silence this warning

Question

I am getting this warning:

Warning: isMounted(...) is deprecated in plain JavaScript React classes. Instead, make sure to clean up subscriptions and pending requests in componentWillUnmount to prevent memory leaks.

How do I fix the warning? I don't want to hide it like this:

import { YellowBox } from 'react-native';
YellowBox.ignoreWarnings(['Warning: isMounted(...) is deprecated', 'Module 
RCTImageLoader']);

Answer 1

All of the comments show you how to hide it, but not how to resolve it since the false positive has been fixed in React Native.

I was using the variable name isMounted in my React Native code, which was a custom instance variable on the class. However, this conflicted with a deprecated variable isMounted which is innately on Component classes - hence the warning.

To solve this, I simply renamed my isMounted variable name to mounted .