A naukri.com initiative
Hackernoon
2d
264
Image Credit: Hackernoon
Mastering Asynchronous JavaScript Callbacks, Promises, and Async, Await for Cleaner React Components
- Asynchronous JavaScript is crucial in React for handling delays and ensuring a smooth user experience.
- Callbacks were the original way to manage async logic before Promises and async/await.
- Callbacks involve passing functions into other functions to be executed later, leading to callback hell with deeply nested functions.
- Promises provide a cleaner way to handle async code, featuring states like pending, fulfilled, and rejected, allowing for chaining with .then() and error handling with .catch().
- Async/await simplifies async coding, making it read like synchronous code, using await to pause a function until a Promise resolves and try/catch for error handling.
- Best practices for using async logic in React components include avoiding using async directly in useEffect, cleaning up async calls on unmount, and utilizing useEffect for async side effects.
- Real-world examples showcase handling API requests with fetch(), managing loading states and errors, and ensuring cleanup of side effects.
- Key takeaways include handling loading and errors, using AbortController to prevent side effects, and wrapping API calls in try-catch-finally for reliable code.
- The importance of showing loading and error states, cleaning up requests, and writing fetch logic that works is highlighted in the key takeaways.
- Writing clean async logic in React involves focusing on basics like handling loading, error states, and cleanup to ensure a reliable UI.
- Starting with plain fetch(), understanding the problem, and solving it cleanly can lead to good code, and additional tools can be used as complexity grows.
Read Full Article
15 Likes
For uninterrupted reading, download the app