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React 18: implementing Conditional Rendering After State Update in a Functional Component

๐Ÿ‘€ Views: 450 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-18
react react-hooks conditional-rendering javascript

I've encountered a strange issue with I've tried everything I can think of but I'm working with an unexpected behavior with conditional rendering in my functional component... After updating the state in response to a button click, the UI doesn't reflect the changes as expected. I'm using React 18 with functional components and hooks. Here's a simplified version of my code: ```javascript import React, { useState } from 'react'; const MyComponent = () => { const [showDetails, setShowDetails] = useState(false); const handleToggle = () => { setShowDetails(prev => !prev); }; return ( <div> <button onClick={handleToggle}>Toggle Details</button> {showDetails && <div className="details">Here are the details...</div>} </div> ); }; export default MyComponent; ``` When I click the toggle button, the `<div className="details">Here are the details...</div>` does not show up immediately. Instead, it might take a second click on the button to make it appear, or sometimes it doesn't render at all. Iโ€™ve tried using `setTimeout` within the `handleToggle` function to see if it was a timing scenario, but that hasnโ€™t helped. The console doesnโ€™t show any errors; it just seems to be a question with the rendering logic syncing with state updates. I also checked my React DevTools and confirmed that the state updates correctly after each click. Is there something I'm missing regarding state updates and rendering in React 18? Are there known issues with functional components in this version that could cause such behavior? Any insights would be greatly appreciated! I'm developing on Windows 11 with Javascript. Am I approaching this the right way?