Handling Dependent State Updates with useEffect and useState in React 18
I'm working through a tutorial and I'm stuck trying to I'm working with an scenario with managing state updates that depend on each other in my React 18 application. I have two pieces of state: `userInput` and `processedData`. The idea is that when `userInput` changes, I need to process it and update `processedData`. However, I'm running into a question where the `processedData` doesn't seem to update correctly or frequently shows stale values. Here's a simplified version of my code: ```javascript import React, { useState, useEffect } from 'react'; const DataProcessor = () => { const [userInput, setUserInput] = useState(''); const [processedData, setProcessedData] = useState(''); useEffect(() => { // Simulating a complex processing function const processInput = (input) => { return `Processed: ${input.toUpperCase()}`; }; if (userInput) { const result = processInput(userInput); setProcessedData(result); } }, [userInput]); return ( <div> <input type="text" value={userInput} onChange={(e) => setUserInput(e.target.value)} /> <p>{processedData}</p> </div> ); }; export default DataProcessor; ``` When I type in the input field, sometimes the `processedData` doesn't update to reflect the current `userInput`. For instance, if I type 'hello', the display sometimes shows 'Processed: ' with an empty string or the previous input. I've tried adding a condition to check if `userInput` is not empty, but it doesn’t seem to solve the question. I've also checked the console for any potential warnings, but nothing stands out. Any insights on why the state might be getting stale and how I can ensure `processedData` always reflects the latest `userInput`? What's the correct way to implement this? Any suggestions would be helpful.