Questions tagged [react-component-unmount]
40 questions
3
votes
0 answers
Cannot update a component (`ContextProvider`) while rendering a different component
I am doing a web application with react and I am getting this warning:
Warning: Cannot update a component (`ContextProvider`) while rendering a different component (`NavBar`). To locate the bad setState() call inside `NavBar`, follow the stack trace…
martibellot
- 93
- 9
3
votes
1 answer
How do I check objects, subscriptions, network requests pending cleanup after React component unmount?
Is there a way to see unnecessary objects still in memory or pending network requests after the React component has unmounted?
If I can see that then I can handle that in componentWillUnmount().
coder
- 109
- 4
3
votes
2 answers
React component state wiped before component unmounted
If I return a function from useEffect I can be sure that that function will run when a component unmounts. But React seems to wipe the local state before it calls my unmounting function.
Consider this:
function Component () {
const [setting,…
shennan
- 10,798
- 5
- 44
- 79
3
votes
2 answers
Which is the way React unmounts child components?
i'm kinda newbie on React but when I was learning about componentWillUnmount() method I found a behavior I can't understand.
Consider this script (here's the fiddle -> https://jsfiddle.net/ockhamsblade/4zf5tq2h/37/):
let myArray =…
Agustín Orejudo
- 101
- 6
2
votes
0 answers
Alternative to Reactdom.render and unmountComponentAtNode in react18
Important note:
I am aware of createRoot and root.unmount()! Unfortunately (If I understand this correctly) they should be used just once in the application for mounting the react application.
Problem description:
In our app we have a modal…
tomdelahaba
- 948
- 3
- 13
- 26
2
votes
0 answers
useEffect: Can't perform a React state update on an unmounted component
I have been developing an event registration website in React. Everything was good until I ran into this:
react-dom.development.js:67 Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory…
nitcherry
- 21
- 4
2
votes
1 answer
Can't perform a React state update on an unmounted component #434
Im trying to add step to realtime database firebase. When I add the step, it works in the database but then the modal closes and I dont have any error but the modal closes without any reason
I think the problem is when I call the firebase to update…
user123456
- 171
- 11
2
votes
3 answers
Why React Component unmounts on each useEffect dependency change?
I am trying to learn React by building a web application. Since I want to learn it step by step, for now I don't use Redux, I use only the React state and I have an issue.
This is my components architecture:
App.js
|
…
paulalexandru
- 9,218
- 7
- 66
- 94
2
votes
1 answer
componentWillUnmount works after switching to another page
I have two pages and two components LibraryPageFilters.tsx (url: /courses) and UserVideoCreatePage.tsx (url: /ugc/courses/${course.id}).
In component LibraryPageFilters.tsx
useEffect(() => {
console.log(course.id)
if (course.id) {
…
Стас Рябцев
- 1,318
- 4
- 19
- 36
2
votes
1 answer
React Spring "Can't perform a React state update on an unmounted component"
I have been running into using react spring when clicking quickly:
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…
Stephen Phillips
- 641
- 10
- 26
1
vote
1 answer
Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak. cancel all subscriptions an
I am passing props from a child nested inside a class component
class Viewer extends React.Component {
....
render(){
return(
.....
)
}
to the parent functional component
function DragAndDrop(props) {
…
Yusuf
- 2,295
- 7
- 15
- 34
1
vote
0 answers
How can i unmount All the State Values in react ? is this possible?
this.state = {
loading: false,
timer: false,
showZero: false,
pin: '',
error: {
emptyPin: false,
checkPin: false,
wrongPin: false,
message: '',
devices: undefined,
type: 999,
checkBoxStr: '',
},
showDialog:…
Vijay
- 275
- 2
- 11
1
vote
0 answers
What happens to Portal child when container or its content is removed?
I plan to use React Portals for a solution I am building, and I am trying to understand what happens to the child when the container or its content is removed.
My code:
ReactDOM.createPortal(child, container)
Where container is a HTML element.
What…
Christophe
- 27,383
- 28
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1
vote
1 answer
Trying to fix: Can't perform a React state update on an unmounted component
I have the following code:
const getAllSlidersUrl = "a url";
const adminID = "an admin id";
const adminlogintoken="a token";
const SliderContainer = () => {
const [allSlides, setAllSlides] = useState([]);
useEffect(
() => {
…
Daniel_Kamel
- 610
- 8
- 29
1
vote
1 answer
Memory leak error while calling fetch API in react
I have following code written in react and I am get memory leak error. I tried few hacks like calling abort and setting the state to null but nothing worked for me so far.
Error I am getting:
Can't perform a React state update on an unmounted…
Eric
- 123
- 9