⚛️ React solves this with useLayoutEffect. Why your Tooltips jump around the screen (and how to fix it)? 👇 We often need to measure a DOM element (like a Tooltip or Dropdown) to position it correctly on the screen. If you use useEffect for this, your users will see a glitch. The element renders ➔ Browser Paints ➔ useEffect runs ➔ Element moves. That tiny "Jump" makes your app feel cheap. ❌ The Old Way (useEffect): It is Asynchronous. It waits for the browser to paint the screen before it runs. Great for data fetching, terrible for DOM measurements. ✅ The Modern Way (useLayoutEffect): It is Synchronous. It blocks the visual update until your code finishes running. React calculates the layout, runs your effect, and then paints the screen. The Rule: • Fetching Data? Use useEffect. • Measuring DOM? Use useLayoutEffect. The Result: Your popovers feel rock solid. No jumping. No flickering. #ReactJS #WebDevelopment #Frontend #UX #JavaScript #CleanCode #SoftwareEngineering #TechTips #DevelopmentTips #ReactHook #ReactTips #React19 #FrontendDeveloper
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📌 What does the documentation say? 📚 React's official docs are very clear on this distinction: "Call useLayoutEffect to perform the layout measurements before the browser repaints the screen." Read the full breakdown here 👇 : https://react.dev/reference/react/useLayoutEffect#measuring-layout-before-the-browser-repaints-the-screen