How We Engineered Visual Edits: The Most Advanced Feature in Lovable Yet

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Technology Lovable Visual Edits how we built Visual Edits AST in the browser frontend engineering WYSIWYG editor React app builder dev tooling hot module replacement Vite

Website Link Below:
https://lovable.dev/?via=pixi

In this behind-the-scenes video, Emil Ahlbäck from the Lovable engineering team walks through how we built Visual Edits—one of the most technically ambitious features in Lovable to date.

Lovable is a full-stack, AI-powered app builder that already enables users to create functional web applications with simple prompts. But polishing the final UI still required code-level changes—until now.

With Visual Edits, we brought Figma-style precision into your app, backed by real JSX code and a browser-based AST. This video dives deep into the problems we solved—slow iteration cycles, costly AI calls—and how we built an instant, WYSIWYG interface powered by:

Client-side AST parsing for safe code changes

Ephemeral Dev Servers running 4,000+ environments

Hot Module Replacement (HMR) for live previews

Tailwind-aware class editing in real time

A bi-directional visual-to-code system

Whether you’re a frontend engineer, platform builder, or just love great dev tools, this video unpacks the architecture, performance, and UX design behind a revolutionary editing experience.

🔧 Built by developers, for developers. Learn more about Lovable and start building instantly.

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