/TypeScript/Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function.

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function.

You can declare let isMounted = true inside useEffect,
which will be changed in the cleanup callback, as soon as the component is unmounted.
Before state updates, you now check this variable conditionally:

useEffect(() => {
  let isMounted = true;               // note mutable flag
  someAsyncOperation().then(data => {
    if (isMounted) setState(data);    // add conditional check
  })
  return () => { isMounted = false }; // cleanup toggles value, if unmounted
}, []);

React warning can't perform a react state update on an unmounted component

componentWillUnmount() {
    // fix Warning: Can't perform a React state update on an unmounted component
    this.setState = (state,callback)=>{
        return;
    };
}

Source: stackoverflow.com

Similar codes

0 vote196 views1 answer
Usage: testing_caption_generator.py [-h] -i IMAGE testing_caption_generator.py: error: the following arguments are required: -i/--image An exception has occurred, use %tb to see the full traceback.
TypeScript
0 vote201 views1 answer
TypeScript interface for object with arbitrary numeric property names?
TypeScript
1 vote188 views2 answers
Typescript null and undefined check
TypeScript
3 votes207 views3 answers
How to view documents folder simulator swift
TypeScript
1 vote243 views1 answer
'react-scripts' is not recognized as an internal or external command, operable program or batch file. npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! [email protected] start: `react-scripts start` npm ERR! Exit status 1
TypeScript
0 vote205 views2 answers
Module '"@angular/fire"' has no exported member 'AngularFirestore'
TypeScript
0 vote243 views2 answers
Npm clean
TypeScript
0 vote194 views1 answer
Actual instructions in flowcharts are represented in __________
TypeScript
0 vote216 views1 answer
How many arguments are in this function call? range(0, 100, 5) 20
TypeScript
0 vote213 views1 answer
Site:community.nxp.com dts gpio output high active
TypeScript