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useFetch react Code Snippet in 2024

hookseffectstateintermediate

Last Updated: 16 June 2024

Implements fetch in a declarative manner.

  • Create a custom hook that takes a url and options.
  • Use the useState() hook to initialize the response and error state variables.
  • Use the useEffect() hook to asynchronously call fetch() and update the state variables accordingly.
  • Return an object containing the response and error state variables.
const useFetch = (url, options) => { const [response, setResponse] = React.useState(null); const [error, setError] = React.useState(null); React.useEffect(() => { const fetchData = async () => { try { const res = await fetch(url, options); const json = await res.json(); setResponse(json); } catch (error) { setError(error); } }; fetchData(); }, []); return { response, error }; };
const ImageFetch = props => { const res = useFetch('https://dog.ceo/api/breeds/image/random', {}); if (!res.response) { return <div>Loading...</div>; } const imageUrl = res.response.message; return ( <div> <img src={imageUrl} alt="avatar" width={400} height="auto" /> </div> ); }; ReactDOM.render(<ImageFetch />, document.getElementById('root'));

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