javascript - Is there a way to check if the react component is unmounted?

Question

I have a usecase where i need to unmount my react component. But in some cases, the particular react component is unmounted by a different function. Hence, I need to check if the component is mounted before unmounting it.

Answer 1

Since isMounted() is being officially deprecated, you can do this in your component:

componentDidMount() { 
  this._ismounted = true;
}

componentWillUnmount() {
   this._ismounted = false;
}

This pattern of maintaining your own state variable is detailed in the ReactJS documentation: isMounted is an Antipattern.