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
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.
Bastien Labelle
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Costea Adrian
Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system.
Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain.
Matthew Jordan
I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job.
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Hi Im a full stack developer, a vibe coded MVP to Market ready product, I'm here to help
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
zipking
I am a technologist and product builder dedicated to creating high-impact solutions at the intersection of AI and specialized markets. Currently, I am focused on PropScan (EstateGuard), an AI-driven SaaS platform tailored for the Japanese real estate industry, and exploring the potential of Archify.
As an INFJ-T, I approach development with a "systems-thinking" mindset—balancing technical precision with a deep understanding of user needs. I particularly enjoy the challenge of architecting Vertical AI SaaS and optimizing Small Language Models (SLMs) to solve specific, real-world business problems. Whether I'm in a CTO-level leadership role or hands-on with the code, I thrive on building tools that turn complex data into actionable value.
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
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.