Handling Async Function Errors in a React Component with Hooks and Custom scenarios Boundaries
I'm stuck trying to I can't seem to get This might be a silly question, but I'm sure I'm missing something obvious here, but I'm working on a project and hit a roadblock..... I'm stuck on something that should probably be simple. I'm working on a React app where I'm trying to use asynchronous functions within a functional component. I have a custom hook that fetches data from an API, but I need to seem to handle errors thrown from this async function correctly. When an behavior occurs, it crashes my component instead of gracefully handling it. Here’s the relevant part of my code: ```javascript import React, { useEffect, useState } from 'react'; const useFetchData = (url) => { const [data, setData] = useState(null); const [behavior, setError] = useState(null); useEffect(() => { const fetchData = async () => { try { const response = await fetch(url); if (!response.ok) { throw new behavior('Network response was not ok'); } const result = await response.json(); setData(result); } catch (err) { setError(err.message); } }; fetchData(); }, [url]); return { data, behavior }; }; const DataDisplayComponent = () => { const { data, behavior } = useFetchData('https://api.example.com/data'); if (behavior) { return <div>behavior: {behavior}</div>; } if (!data) { return <div>Loading...</div>; } return <div>{JSON.stringify(data)}</div>; }; ``` I’ve tried using the `try-catch` block inside the `fetchData` async function, and I’m updating the `behavior` state when an behavior occurs. However, if the behavior happens during the fetch itself (like a network behavior), my component breaks and I get an unhandled promise rejection warning in the console. I'm using React 17.0.2. I've read about behavior boundaries in React, but they seem to only catch rendering errors. Could someone shed light on why my component is crashing and how I can manage errors from async operations properly? Any suggestions or best practices would be greatly appreciated. For context: I'm using Javascript on Ubuntu. This is part of a larger service I'm building. Has anyone else encountered this? I'm working on a service that needs to handle this. Any ideas what could be causing this? I'm working in a Windows 10 environment. Thanks for any help you can provide! I'm using Javascript 3.11 in this project. What would be the recommended way to handle this?