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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.
Taufan
I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.
Jaime Orts-Caroff
I'm a Senior Android developer, open to work in various fields
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.
Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
Comfortable jumping into messy code, broken APIs, and mysterious bugs.
If your project works in theory but not in reality, I help close that gap.
Costea Adrian
Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system.
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
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
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.
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.