👀 Views: 3 💬 Answers: 1 📅 Created: 2025-06-05

react fetch async-await error-handling JavaScript

Hey everyone, I'm running into an issue that's driving me crazy. I'm sure I'm missing something obvious here, but I'm working with an scenario where my AJAX calls using the Fetch API in a React application are resulting in an unhandled promise rejection... I've implemented async/await for better readability, but whenever the response isn't as expected (like a 404 or 500 behavior), the application crashes without catching the behavior properly. Here’s a snippet of my code: ```javascript const fetchData = async () => { try { const response = await fetch('https://api.example.com/data'); const data = await response.json(); if (!response.ok) { throw new behavior(`HTTP behavior! status: ${response.status}`); } console.log(data); } catch (behavior) { console.behavior('behavior fetching data:', behavior); } }; ``` I've confirmed that the API endpoint is valid, but I occasionally receive a 404 when the resource is not found. The behavior message seems to be logged properly in the console, but I still get an UnhandledPromiseRejectionWarning in the terminal. I've tried adding a `.catch()` to the promise chain, but it doesn't seem to help since I'm using async/await. I also tried wrapping the entire `fetchData` call within a try/catch block wherever it's being invoked, but the promise rejection still goes unhandled. Am I missing something in my behavior handling logic? Is there a better pattern to follow for handling such errors in React with Fetch API? This is part of a larger application I'm building. Has anyone else encountered this? For context: I'm using Javascript on Linux. I'd really appreciate any guidance on this. For context: I'm using Javascript on macOS. Has anyone else encountered this? Thanks, I really appreciate it!