DEV Community

sasasasasmmm
sasasasasmmm

Posted on • Edited on • Originally published at snipbits.dev

Fetch in Reactjs

#react #fetch #usestate #useeffect

A hook that implements fetch in a declarative manner.

  • Create a custom hook that takes a url and options.
  • Use the React.useState() hook to initialize the response and error state variables.
  • Use the React.useEffect() hook to anychronously call fetch() and update the state variables accordingly.
  • Return an object containting 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 }; };
Enter fullscreen mode Exit fullscreen mode 
//Example 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"));
Enter fullscreen mode Exit fullscreen mode

Live Demo

https://codesandbox.io/s/xenodochial-wind-z2djq?file=/src/index.js

More Code Snippets

https://www.snipbits.dev/

Top comments (0)