A deep look at how a single CSS feature moves through React Native’s New Architecture, from JavaScript styles to native rendering on iOS and Android.

Callstack Blog

A detailed walkthrough of implementing CSS clip-path support natively in React Native's New Architecture. The post traces the full journey from JavaScript style definitions through the C++ Fabric renderer to platform-specific rendering on iOS (using CALayer masks and UIBezierPath) and Android (overriding the draw method with Canvas clipping). It covers required changes at each layer: TypeScript/Flow type definitions, C++ data structures for shapes like circle, polygon, rect, stacking context updates in ViewShadowNode, and platform-specific path creation utilities. Three PRs implementing this feature are currently under review in the React Native repository.

Bringing CSS Clipping to React Native