react▌

Type-safe React = compile-time guarantees = confident refactoring.

Identify render hotspots, isolate expensive updates, and apply targeted optimizations without changing UI behavior.

sentry-react-sdk

Use this skill for changes touching vendored React, react-server-dom-webpack/*, or react-server layer boundaries.

Expert guidance for building type-safe Expo React Native applications with modern best practices. \n \n Covers TypeScript standards, functional component patterns, and strict mode configuration with interfaces over types \n Includes responsive design strategies using Flexbox, dark mode support, and accessibility standards via ARIA roles \n Addresses performance optimization through image lazy loading, code splitting with Suspense, and state management with Context/Zustand \n Provides error handl

Convert JSON specifications into type-safe React component trees with state management and dynamic expressions. \n \n Supports declarative UI specs with element trees, two-way data binding via $bindState , conditional rendering, and computed expressions \n Built-in state management through StateProvider with optional external store integration (Redux, Zustand, XState) and JSON Pointer-based state paths \n Event system with action dispatching, state watchers, and four built-in actions: setState ,

Comprehensive React component testing with Jest and React Testing Library covering configuration, mocking, async patterns, and best practices. \n \n Covers Jest configuration for JavaScript and TypeScript projects, including setup files, module mapping, and coverage thresholds \n Provides query strategies prioritizing accessibility (getByRole, getByLabelText) and explains getBy, queryBy, and findBy variants \n Includes mocking patterns for modules, functions, API calls via MSW, context, and chil

Prescriptive workflow for incremental adoption of React Native in existing native apps using @callstack/react-native-brownfield, from initial setup through phased host integration.

Authentication for React SPAs using Auth0 Universal Login with redirect-based flows. \n \n Supports React 16–19 with Vite or Create React App; wraps your app with Auth0Provider and exposes hooks like useAuth0() , loginWithRedirect() , and logout() \n Handles user sessions, access tokens, and profile data automatically; SDK manages secure token storage without manual localStorage handling \n Includes protected routes, API token injection, and error handling patterns documented in the integration

Core React patterns for component design, state management, and optimization.