Can't perform a React state update on an unmounted component?

Question

I am fetching data in componentDidMount and updating the state and the famous warning is appearing:

Can\'t perform a React state update on an unmounted co

Answer 1

Just create flag in state: isMounted: false. In componentDidMount set state isMounted = true and in componentWillUnmount: set state isMounted = false.

And in the async function that need use setState function, wrap them by condition if(this.state.isMounted) { ....setState action }