advanced patterns of useEffect with dependency array in React 18 causing infinite loop
I'm deploying to production and Could someone explain I'm having trouble with I'm working on a personal project and I've been struggling with this for a few days now and could really use some help..... I'm experiencing an infinite loop when using the `useEffect` hook in my React 18 application. I have a component that fetches data from an API and updates its state based on the response. However, I noticed that when I include the state variable in the dependency array of `useEffect`, it re-triggers continuously, leading to an infinite update cycle. Here’s a simplified version of my component: ```javascript import React, { useState, useEffect } from 'react'; const DataFetchingComponent = () => { const [data, setData] = useState(null); const [fetchCount, setFetchCount] = useState(0); useEffect(() => { const fetchData = async () => { const response = await fetch(`https://api.example.com/data?count=${fetchCount}`); const result = await response.json(); setData(result); }; fetchData(); }, [fetchCount]); // Including fetchCount here return ( <div> <h1>Data</h1> <pre>{JSON.stringify(data, null, 2)}</pre> <button onClick={() => setFetchCount(count => count + 1)}>Fetch New Data</button> </div> ); }; export default DataFetchingComponent; ``` When I click the button, it updates `fetchCount`, which should trigger the `useEffect` to fetch new data. However, I've noticed that after the first fetch, it seems to trigger again immediately without me clicking the button, causing an infinite loop of fetch requests. The console shows the following warning: ``` Warning: need to perform a React state update on an unmounted component. ``` I've tried removing `fetchCount` from the dependency array altogether, which stops the infinite loop but doesn't allow for new fetches. I've also double-checked the API endpoint to ensure it's returning valid data and not causing some unexpected behavior. Can someone guide to understand why this is happening? Is there something I’m missing in the useEffect implementation, or is there an scenario with how I'm managing state and side effects in this component? Any insights would be appreciated! For context: I'm using Javascript on Linux. Am I missing something obvious? Any ideas how to fix this? Thanks for taking the time to read this! For context: I'm using Javascript on Windows 11. I recently upgraded to Javascript stable. Thanks for your help in advance! I'm coming from a different tech stack and learning Javascript. Thanks, I really appreciate it!