React Api Fetching — Free React Tutorial
Learn React Api Fetching in React with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn React Api Fetching in React with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
React Api Fetching in React
APIs (Application Programming Interfaces) let your React app fetch data from servers. The most common way is using the `fetch()` function, which returns a Promise. Call fetch with a URL, chain `.then()` calls to parse the response and update state, and use `.catch()` to handle errors. For cleaner code, use `async/await` syntax inside useEffect. Always fetch data in useEffect, not during rendering, to avoid infinite loops.
When fetching data, manage loading and error states. Start with `loading: true`, update it to `false` when data arrives, and show a loading message to the user. Also handle errors gracefully by catching them and displaying an error message. This creates a better user experience and makes debugging easier.
REST APIs return data as JSON. Use `response.json()` to parse the JSON string into JavaScript objects. Some APIs require authentication headers or query parameters. Remember to include a dependency array `[]` in useEffect so the fetch only happens once when the component mounts, preventing multiple requests.
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