mockup-extract

To extract a UI component into a mockup sandbox, the tool pulls the component and its dependencies from the main app, rewrites imports, stubs external dependencies, and embeds the result as an iframe on the canvas for visual comparison.

Yes, you can preview extracted UI components in isolation while preserving real source code integrity. The sandbox automatically stubs external dependencies to keep the environment self-contained without altering the main application's codebase.

Dependency rewriting and import stubbing are used to isolate components in a mockup sandbox by replacing external module references with self-contained stubs, ensuring the UI component renders accurately without requiring the full application environment.

Iframe embedding works effectively for accurate visual comparison of redesign variants. It renders the isolated component on the canvas, allowing designers to compare live alternatives built on real source code rather than hand-coded approximations.

The best way to start redesigning a component is to ask the tool to extract the specific component from the main app and load it into the mockup sandbox, which then automatically handles dependency isolation and iframe embedding for iteration.

You should not use component extraction for UI previews if your component lacks clear external dependencies to stub or if the main application environment cannot be easily isolated, as the sandbox requires dependency rewriting to function properly.