Is it appropriate to use useEffect to fetch new state when a prop changes? For example, like this: const Parent = () => { const [parentVal, setParentVal] = useState(0); const updateParentVal = () => { setParentVal((v) => v + 1);…
I keep getting error saying the property I'm trying to loop over is undefined. However is I paste the same data in as a variable it works. Also the console.log shows the data is there. This is a component that…
I have a very simple React app to better understand how useEffect works. This app has the App component with useEffect hook. Inside this hook, I simulate a heavy synchronous task using a for loop. I am curious about the…
I have an object which comes from FieldErrors react-hook-form, however, I am not sure how to access the object in order to retrieve the message property. The object shown in the image below comes from react-hook FieldErrors where I added…
I have a react component similar to this: export default function App() { const [minVal, setMinVal] = useState(-19.0); const [maxVal, setMaxVal] = useState(17.65); const steps = 0.25; const [val, setVal] = useState(0); useEffect(() => { setMinVal(Number(minVal).toFixed(2)); setMaxVal(Number(maxVal).toFixed(2)); let avg =…
I'm working trying to add an object created from data returned in an AXIOS request to state in a React Application. The object itself appears to be fine and even prints out as expected without errors but when I go…
Please help I can't figure out how to do this in react so I have three buttons and I need to make it so when you click on a button the state of others sets back to false. Here's the…
I'm using in App.jsx my useState. I've got 2 child components, and . With the ternary in App.jsx, it will render the homepage the with the choices. When you click on details, you get details from one item. That code…
Let's say I'm making a music website. I created a MusicPlayer component: function MusicPlayer() { const [playingTrackId, setPlayingTrackId] = useState<number | null>(null) useEffect( () => { console.log(`Stopping all audio of this player`) // Doesn't affect other players if (playingTrackId !==…
I am building a next js application and need user authentication for that. In the page.js file I am sending a function call to firebase/firebaseAuth.js file, where it authorizes and sends the data to page.js. In the page.js, using the…