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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.
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
rayush33
JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale.
In addition to development, I often collaborate closely with product managers, business analysts, designers, and QA teams to ensure that solutions align with both technical and business goals.
I enjoy working with startups and product teams where I can contribute both as a hands-on engineer and as a technical partner in designing and delivering impactful software.
legrab
I'll fill this later
David Olverson
Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
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
Meïr Ankri
Full-stack developer specializing in React / Next.js / Node.js with 6+ years of experience. I've worked across various sectors including automotive (Reezocar/Société Générale), healthcare (Medical Link SaaS), and e-commerce (Glasman). I build web apps end-to-end, from architecture to production, with a focus on scalability, performance, and code quality. I also mentor junior developers and contribute to technical decisions and code reviews.
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.