About

renderobjects.com is a reference and learning resource for Flutter developers working with custom render objects.

The site covers the full render object API — layout, painting, hit testing, semantics, and debugging — with practical code examples for each method you'll need to override.

What's here#

• Guides — Concept-level walkthroughs of how render objects work, from the layout phase to compositing.
• API Reference — Per-method documentation for every override point in RenderObject and RenderBox.
• Examples — Worked examples of what you can build: custom scrolling, particle effects, data visualization, and game UI.
• RenderKit — An AI-powered toolkit for generating and validating a custom render object.