setstate Questions
3
Solved
I have two react components and I'd like to call setState to set a state in the one Component but called in the other one.
How do I do that?
Codeclination asked 6/3, 2019 at 17:7
2
I am building a Currency Input component using React Native TextInput.
While the user is typing, the requirement is that the text should always be format in this way:
$ + [integer-part] . [2 digi...
Knead asked 22/4, 2019 at 16:39
12
class MyHome extends StatefulWidget {
@override
State<StatefulWidget> createState() => new MyHomePage2();
}
class MyHomePage2 extends State<MyHome> {
List items = new List();
b...
10
Solved
I am very new to ReactJS (as in, just started today). I don't quite understand how setState works. I am combining React and Easel JS to draw a grid based on user input. Here is my JS bin:
http://js...
Whopping asked 8/1, 2016 at 22:20
1
Solved
Context
I am encountering an issue with FutureBuilder in Flutter where it recreates its Future on every widget rebuild, causing unexpected behavior in my app.
Specifically, I have a FutureBuilder t...
Michaelemichaelina asked 4/1 at 18:9
2
Solved
I have a streambuilder that loads information from firestore. Then I use a listview.builder to display the information. The displayed information is being called by the function firstBuildItem or b...
7
When a react component state changes, the render method is called. Hence for any state change, an action can be performed in the render methods body. Is there a particular use case for the setState...
3
Solved
I want to display something in a Text whenever a TextFields text changes:
class _MyPageState extends State<MyPage> {
String name;
@override
Widget build(BuildContext context) {
TextEditin...
3
Solved
I call my stateful widget page and get some info from the server. If no info found it warns the user that there isn't any info.
From the drawer back button, I go back to the previous page. If I kee...
33
Solved
Problem
I am writing an application in React and was unable to avoid a super common pitfall, which is calling setState(...) after componentWillUnmount(...).
I looked very carefully at my code and...
Misname asked 27/12, 2018 at 18:33
36
Solved
I'm trying to organize my state by using nested property like this:
this.state = {
someProperty: {
flag:true
}
}
But updating state like this,
this.setState({ someProperty.flag: false });
...
Harebell asked 27/3, 2017 at 7:51
5
Solved
I know that React may perform state updates asynchronously and in batch for performance optimization. Therefore you can never trust the state to be updated after having called setState. But can you...
Mayst asked 1/2, 2018 at 13:13
5
EDIT: since the code snip does not reproduce the bug - here is a link to the github repo: (code is far FAR from complete)
https://github.com/altruios/clicker-game
I have run it on two computers n...
Doldrums asked 30/5, 2020 at 17:58
6
Solved
Suppose I have the following code: (which is too verbose)
function usePolicyFormRequirements(policy) {
const [addresses, setAddresses] = React.useState([]);
const [pools, setPools] = React.useSt...
Oliy asked 3/12, 2019 at 18:37
2
If we set the state with the same value component won't re-render, but it's not applicable when I set the state in the function body.
For example, if I set the same state on the button click and th...
Dateless asked 26/10, 2022 at 23:27
2
Solved
There are certainly a lot of questions and answers about setState, and I've tried looking at them, but haven't found a problem (or solution) that resembled mine closely enough to be useful. It's st...
Howlan asked 5/8, 2020 at 13:13
13
Solved
I'm working on a todo application. This is a very simplified version of the offending code. I have a checkbox:
<p><input type="checkbox" name="area" checked={this.state.Pencil} onChange=...
2
Solved
I tried to script animated dialog with 'showGeneralDialog' inside SetState() of 'fling' function called by {AbsorbPointer} (specifically {GestureDetector} onPanEnd). I attached the simple code, I t...
4
Solved
if monthOffset = 12 the condition will evaluate to true and update the yearOffset state to 2017 if yearOffset = 2018. Based on the react docs and other answers I've read, the callback function in t...
Clodhopping asked 22/8, 2018 at 1:1
4
Solved
I have this state in my main parent component:
this.state = {
playableCards: [],
openedCard: null,
offeredChips: 0,
activePlayer: 0, // first player is 0, second player is 1
players: [
{
n...
4
Solved
I have a project with Flutter.
I am using Provider (4.0.5) for state management.
I am getting this warning, "setstate or markneedsbuild() called during build"
This is big problem for me. I think t...
Worldly asked 27/4, 2020 at 15:11
4
I have read in this official article these lines:
this.props and this.state may be updated asynchronously, you should not rely on their values for calculating the next state.
Can anyone please...
Chordophone asked 13/6, 2018 at 12:45
6
Solved
my function looks like this:
this.setState(prevState => ({
time : prevState.time + 1
}), function() {
doSomethingWithNewState(this.state.time)
})
is it correct to use await in this situati...
Yogi asked 22/8, 2018 at 14:6
4
I have the handleSelection method called when a button is clicked, however, if I click the button once the state does not get set when it gets to this.setState({selectedFoods: newSelections});. Eve...
Propman asked 15/6, 2016 at 22:42
3
If I am declaring the variables as final then the values(variables) I want to change(on pressed) are in setState(){} so those variables can be changed What to do to prevent this?
Also, why is it wr...
Gatha asked 13/9, 2019 at 18:36
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