Lovable
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Lovable Live Preview Not Reflecting Code Changes
When you make changes in Lovable's editor, the live preview doesn't update. You modify text, add components, or change styles, but the preview still shows the old version. You have to manually refresh or sometimes even restart the preview to see changes.
The live preview is one of Lovable's key features — seeing your changes instantly is essential for an iterative design workflow. When it breaks, development becomes painfully slow as you're constantly refreshing and waiting.
The issue might be intermittent (works sometimes, not others), specific to certain file types, or happen consistently after making certain kinds of changes.
Error Messages You Might See
[HMR] Waiting for update signal from WDS...
WebSocket connection to 'ws://...' failed
[vite] Failed to connect to HMR server
Module build failed
Common Causes
- Browser cache serving stale content — The browser aggressively caches JavaScript and CSS files, ignoring updates
- Hot module replacement (HMR) disconnected — The WebSocket connection for live reloading has been lost
- Build error preventing update — A syntax error in your code prevents the preview from rebuilding
- Service worker caching — If your app has a service worker (PWA), it may serve cached content
How to Fix It
- Hard refresh the preview — Use Ctrl+Shift+R (or Cmd+Shift+R on Mac) to bypass the browser cache
- Check for build errors — Look in the Lovable console/terminal for any compilation errors that would prevent updates
- Clear browser cache — Open DevTools → Application → Storage → Clear site data
- Check WebSocket connection — In DevTools Network tab, look for the WebSocket connection (ws://) and verify it's still active
- Disable service worker — In DevTools → Application → Service Workers, click 'Unregister' to stop service worker caching
Real developers can help you.
Yovel Cohen
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10 years as fullstack developer
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SW engineer with 6+ years of experience,
I worked with React/Node/Python
did projects with React+Capacitor.js for ios
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Meïr Ankri
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Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations.
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Stanislav Prigodich
15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Why does the preview work after a full page refresh but not automatically?
This usually means the Hot Module Replacement (HMR) WebSocket connection has been lost. The build system compiles your changes but can't push them to the browser. Try reconnecting by refreshing once, and the HMR connection should re-establish.
Can a service worker interfere with live preview?
Yes. If your app registers a service worker for PWA functionality, it can cache and serve old versions of your files. Unregister the service worker in DevTools during development.