I use useState hock to store the value but it did not update

I am new to Reactjs I am trying to build an address form with 3 Select ( country, State, City ) I used React hock so when the page first load it will fetch countries list to country select after that …

Trouble on adding items to Flatlist, React Native

DIET (screen) export class Diet extends Component { constructor(props) { super(props); this.state = { foodList: [], }; } render() { return ( …

React State only updates when setting a useless state variable along with the necessary state variable

State is defined like so: const [items, setItems] = useState([] as CartItemType[]); const [id, setId] = useState(); In this case, id is totally useless. Don’t need it in my …

useQuery hook not returning data variable

I have a problem in my useQuery hook from react-query package. Here I call the API using axios and I’m successfully getting the data (I debugged my app). The problem is when I return the result it’s …

Stale closures with react hooks and click events

I have created a codesandbox for easier debugging: https://codesandbox.io/s/hardcore-dirac-nh4iz?file=/src/App.tsx I have built a DataList component that I use like: function App() { const [count, …

How to use an async database call to set a variable with useState() and useEffect()?

I’m trying to set a variable with a simple GET database call. The database call is returning the data correctly, but the variable remains undefined after every re-render. Code is below… the …

React Hooks TypeError: todos is undefined

I am using PERN Stack with bootstrap for styling. So, I want to access my JSON data and show it in the form of todo lists. When I tried using map function I got TypeError: Here is the code: import …

Plot histogram in ReactJS

Suppose I want to plot histogram for time taken to read each book. I calculated time to read each book and stored in an array as const timeToRead = [10,12,8,3,7] As I gone through different methods …

My first api request always fails after page load

I’m having a problem with my API request that always fails after page load. Don’t really know where Im wrong. Here’s my request and I call it when I interact with handleOpen function. const stock = {…

React Hooks: Passing state prop is NOT a function?

I am passing state hooks as props to my components and my ‘setCity’ works perfectly fine but when I try implementing setFlag I get an error saying “Searchbar.jsx:15 Uncaught TypeError: setFlag is …