I have the following frontend: AuthContext.js: const { createContext, useState, useContext } = require("react"); const AuthContext = createContext(); export function useAuth() { return useContext(AuthContext); } export function AuthProvider({ children }) { const [auth, setAuth] = useState(); return ( <AuthContext.Provider value={{…
I have called setState() to update the objects of the class MyErrorBox, but Flutter does not run the build function for those objects. I am new to Flutter and coding in general. The MyText class in the code below is…
Im trying to reassign the value of scscf before sending it to container but its always undefined Here are my code flow constructor(){ this.state = {scscf: null} Data init on componentWillReceiveProps componentWillReceiveProps(nextProps) { this.setState({scscf: nextProps.currentItem.scscf}) } My onchange handle onChangeSCSCF(atrr,…
Using Bloc pattern to show a list of data fetched from rest api. Now I want to update the list on listview on button click. When I click on button, it fetches the data but it does not update the…
I have the following code: function App() { const [appData, setAppData] = useState(initialAppDataValue); const [test, setTest] = useState(""); // outside useEffect if(!DataProviderService.isInitialized){ fetchData(); } // inside useEffect /*useEffect(() => { fetchData(); }, []);*/ function fetchData(){ DataProviderService.getAppData().then((data) => { setAppData(data); setTest("abc");…
I'm trying to do a conditional state update in react where some keys are only updated if another value changes (used to reset some values for settings to null if certain modes are selected). This pattern used to work fine…
May i know how to set state value after get value from function? const getValueFunction = () => { dispatch(fetchData(setData, 1, pages.current, rowsNumber)); } useEffect(() => { pages.current = 1; getValueFunction(); const obj = data.reduce((r, { setCode }) => {…
I have a React functional component in which I have some input fields, a button, and a tooltip. The tooltip is disabled by default and should only be enabled and visible if the button is clicked while the input fields…
I'm writing an app which inside its home screen I want to select the contacts by long press click it's actually works but I want after doing this the app bar actions widget change. so I've created a static variable…
this snippet of code gives me a bad setState error. I want the code in onChange to run immediately without a callback ()=> after onChange, as I want a button to disable if all the form fields are not filled…