I use the AppState API listener to run a function when the app comes from background to active state. I remove it on the useEffect cleanup, but it is still being called on the other screens like it was never…
Here props.data!.lineChartData![0].color! can be optional, so what to modify in code such that if it is defined then it should render stroke color from props.data!.lineChartData![0].color! else from sam.line stroke where sam=useSample(), Please check the photo for code tried before. use…
i have unexpected behaviour. "user" variable that i declared at the top of App compenent is null by default. At the first start or refresh of path=/, useEffect of App compenent gets executed before child compenent which is Login, What…
I catch the input values, and add them to the date object. The problem is that the mail field is included in an internal object (data{data{mail:""}}). Below is my code, I don't understand how to add a value to an…
I'd like to implement the equivalent to the javascript localStorage in my React Native app. But I'm unsure how to set. To function how I want it to, I would like the localStorage to be stored every time the app…
Considering such code below: const [list, setList] = useState([]); const [curPage, setCurPage] = useState(0); const fetchItem = useCallback(async ()=>{ const data = await callAPI(); // data is an object setList(prev => [...prev, data]); },[]); useEffect(()=>{ if(list.length - 1 < curPage)…
I have a page to show a list. And when I tap on a Delete button, I want to delete the item by id from the list. The key code looks like below: type PageListData<T> = { loadStatus: LoadStatus, loadMoreStatus:…
I am using react native's createNativeStackNavigator to navigate between two screens, say screen A and Screen B. Each screen have their own states and also each have their own buttons that can change their state. The problem I am facing…
How to delay React Firebase Hooks until it is known if user is logged in (similar to how enabled works on React Query useQuery) I need to get data from firebase, but only want to get the data if the…
If I have two select controls, one which is dependant on the other, so that if I change selectA value, selectB value will be selected depending on it: ... const [values, setValues] = useState({ selectA: undefined, selectB: undefined }); const…