21 lines
626 B
Markdown
21 lines
626 B
Markdown
|
---
|
||
|
|
tags:
|
||
|
|
- javascript
|
||
|
|
- react
|
||
|
|
---
|
||
|
|
|
||
|
|
# Errors
|
||
|
|
|
||
|
|
## State update on unmounted component
|
||
|
|
|
||
|
|
> 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.
|
||
|
|
|
||
|
|
This typically happens when you have an API request running in the background.
|
||
|
|
Once the data is returned, React tries to update the state but the component is
|
||
|
|
unmounted.
|
||
|
|
|
||
|
|
As the warning suggests, this can be resolved using the cleanup parameter within
|
||
|
|
[React_useEffect](React_useEffect.md#cleanup-functions).
|