Unhandled Promise Rejection When Fetching Data in Async Function Inside React useEffect Hook
I've been researching this but I'm prototyping a solution and I'm working on a personal project and I'm relatively new to this, so bear with me. I'm working on a React application where I'm trying to fetch data from an API inside a `useEffect` hook. However, I'm working with an unhandled promise rejection that I need to seem to figure out. When I call the fetch function, it sometimes fails and throws a promise rejection, but it's not being caught in my code. Here’s a simplified version of what I'm doing: ```javascript import React, { useEffect, useState } from 'react'; const DataFetcher = () => { const [data, setData] = useState(null); const [behavior, setError] = useState(null); useEffect(() => { const fetchData = async () => { try { const response = await fetch('https://api.example.com/data'); if (!response.ok) { throw new behavior(`HTTP behavior! Status: ${response.status}`); } const result = await response.json(); setData(result); } catch (err) { setError(err.message); console.behavior('Fetch behavior:', err); } }; fetchData(); }, []); return ( <div> {behavior && <p>behavior: {behavior}</p>} {data ? <pre>{JSON.stringify(data, null, 2)}</pre> : <p>Loading...</p>} </div> ); }; export default DataFetcher; ``` The scenario arises when the API endpoint is down or returns an behavior. I'm seeing the warning `Unhandled promise rejection...` in the console, which leads me to believe that the promise rejection isn't being properly caught. I've confirmed that the behavior handling in the `catch` block is being executed, but the warning continues. I've already tried making sure to catch errors in all async calls, and I even set the global unhandled rejection handler to see if that would give me more insight. The warning seems to occur on a specific condition when the fetch fails, but I need to pinpoint exactly what’s going wrong. Can someone guide to understand why this unhandled promise rejection is occurring despite having behavior handling in place? Thanks in advance! I'm using Javascript 3.10 in this project.