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React useEffect not triggering on state update when using functional updates

👀 Views: 54 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-10
react useeffect usestate JavaScript

I'm testing a new approach and I'm working on a personal project and I'm working on a React application where I'm trying to manage state using the `useState` and `useEffect` hooks. I've set up a piece of state to track a value, and I'm using a functional update to change that state. However, I'm finding that my `useEffect` is not triggering as expected when the state updates. Here's a simplified version of my code: ```javascript import React, { useState, useEffect } from 'react'; const MyComponent = () => { const [count, setCount] = useState(0); useEffect(() => { console.log('Count updated:', count); }, [count]); const incrementCount = () => { setCount(prevCount => prevCount + 1); }; return ( <div> <p>Count: {count}</p> <button onClick={incrementCount}>Increment</button> </div> ); }; export default MyComponent; ``` The goal is for the `useEffect` to log the updated count whenever I click the increment button. However, I'm finding that the log statement doesn't reflect the updated count correctly; it seems to always log the previous value. I checked the dependency array and it seems correct. Is there a specific caveat with using functional updates in this scenario that I might be missing? I also ensured that React is up to date (version 18.0.0). Any insights would be appreciated! What's the best practice here? This is part of a larger application I'm building. What am I doing wrong? I appreciate any insights!