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use hook issue about react HOT 8 CLOSED

Eng1Mahmoud avatar Eng1Mahmoud commented on September 1, 2024
use hook issue

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Comments (8)

hungcung2409 avatar hungcung2409 commented on September 1, 2024 1

@Eng1Mahmoud

  • Your promise is created every render so it prints out multiple log.
  • Just create a promise outside of Component and it will work as expected [codesanbox]

image

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amiii123malviya avatar amiii123malviya commented on September 1, 2024 1

Is this issue still active?

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Eng1Mahmoud avatar Eng1Mahmoud commented on September 1, 2024 1

@hungcung2409 thanks it work fine now

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Eng1Mahmoud avatar Eng1Mahmoud commented on September 1, 2024

data displayed many time in console and then give me this error

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Eng1Mahmoud avatar Eng1Mahmoud commented on September 1, 2024

@jwinr So what is the use of use hook if I replace it with useEffect and useState؟

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AMANn5153 avatar AMANn5153 commented on September 1, 2024

If fetchData is being invoked directly inside the component body, it could cause multiple fetches on each render.
fetchData is an async function, but use expects a Promise or context. Since fetchData is not being invoked as a Promise but just passed as a function, it will not work as intended.

using useEffect hook can resolve this problem it will only fetch data once the component mount

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Eng1Mahmoud avatar Eng1Mahmoud commented on September 1, 2024

in react 19 use hook should be solve call fetch function inside comment, but it not work as expected @AMANn5153

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surenpoghosian avatar surenpoghosian commented on September 1, 2024

@Eng1Mahmoud You can do it this way also

const fetchData = async (): Promise<Record<any, any>> => {
  const resp = await fetch('https://jsonplaceholder.typicode.com/todos/1*');
  const result = resp.json();

  return result;
};

export default function App() {
  const data = use(fetchData());
  return <div>{JSON.stringify(data)}</div>;
}

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