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Found 2,144 Skills
Testing patterns for Vitest, React Testing Library, and Jest. Routes to component, hook, and integration test examples.
React 19+ patterns, performance optimization, and component architecture. Covers hooks, state management decision trees, data fetching with use() API, Server Components, React Compiler, bundle optimization, and re-render elimination. Use when building components, optimizing re-renders, fetching data, managing state, handling forms, structuring frontends, or reviewing React code.
Patterns for React Native (Expo), navigation, and mobile state.
React Native patterns for mobile app development with Expo and bare workflow. Trigger: When building mobile apps, working with React Native components, using Expo, React Navigation, or NativeWind.
React error boundaries and fallback UIs for catching rendering errors. Use when handling component crashes, displaying error states, implementing error recovery, or preventing full-page crashes. Use for ErrorBoundary, componentDidCatch, getDerivedStateFromError, error fallback, error recovery, crash handling, react-error-boundary library.
SOLID principles for React 19. Files < 100 lines, hooks separated, interfaces in src/interfaces/, JSDoc mandatory. Use for React architecture and code quality.
React framework for building user interfaces. Use for React components, hooks, state management, JSX, and modern frontend development.
React testing best practices using React Testing Library, Vitest, and Jest. Use when writing, reviewing, or generating tests for React components, hooks, context providers, async interactions, or form submissions. Triggers on tasks like "write a test for this component", "add unit tests", "test this hook", "mock this API call", "improve test coverage", or "set up Vitest".
State management in Angular 17+ using Signals and RxJS. Covers signals APIs, RxJS boundaries, and immutable state.
React Native with Expo framework for building native mobile apps on Android, iOS, and web from a single TypeScript codebase. Covers Expo Router file-based navigation (stack, tabs, drawer), EAS Build/Submit/Update for CI/CD and OTA updates, expo-dev-client for custom development builds, Expo Modules API for native Swift/Kotlin modules, core RN patterns (StyleSheet, FlatList, Platform-specific code), native device APIs (camera, notifications, haptics), and NativeWind for Tailwind CSS styling. Use when building React Native apps with Expo, configuring Expo Router navigation, setting up EAS Build pipelines, implementing OTA updates, creating native modules, or integrating device APIs like camera and push notifications.
Build and structure React applications with TypeScript, Tailwind CSS, Recharts, and modern best practices. Use when creating React components, hooks, API layers, charts, dashboards, or when the user asks about React project structure, TypeScript patterns, or frontend architecture.
Guides proper usage of the key prop in React lists. Use this skill when rendering lists, mapping arrays to components, or troubleshooting list-related state bugs.