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Found 42 Skills
Modern TypeScript/JavaScript testing with Vitest. Fast unit and integration tests, native ESM support, Vite-powered HMR, and comprehensive mocking. Use for testing TS/JS projects.
Vitest test runner for JavaScript and TypeScript. Fast, modern alternative to Jest. Vite-native, ESM support, watch mode, UI mode, coverage, mocking, snapshot testing. Use when setting up tests for Vite projects, migrating from Jest, or needing fast test execution.
Write tests using Vitest and React Testing Library. Use when creating unit tests, component tests, integration tests, or mocking dependencies. Activates for test file creation, mock patterns, coverage, and testing best practices.
Vitest testing framework expert for Vite integration, Jest migration, browser mode testing, and performance optimization
Vitest testing framework patterns and best practices. Use when writing unit tests, integration tests, configuring vitest.config, mocking with vi.mock/vi.fn, using snapshots, or setting up test coverage. Triggers on describe, it, expect, vi.mock, vi.fn, beforeEach, afterEach, vitest.
Vitest testing framework for unit, component, and integration tests. Covers test structure (describe/it/test.each), assertions with expect, lifecycle hooks, mocking (vi.fn/vi.mock/vi.spyOn), React Testing Library patterns, hook testing with renderHook, user-event interactions, async utilities, configuration, workspace setup, coverage, and advanced patterns like in-source testing and concurrent execution. Use when writing unit tests, component tests, integration tests, or testing React hooks. Use for test configuration, mocking modules, testing async behavior, snapshot testing, or setting up test coverage.
Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest.
Generate comprehensive Vitest tests for code examples in JavaScript concept documentation pages, following project conventions and referencing source lines
Use when writing unit/integration tests for Vite projects - provides Vitest configuration, test APIs, mocking patterns, and coverage setup
Vitest 4+ testing with Vite. Use when configuring vitest.config.ts, writing unit/integration/browser tests, implementing mocks with vi.fn/vi.spyOn/vi.mock, setting up V8 or Istanbul coverage, or migrating from Jest or older Vitest workspace setups. Triggers on vitest, vitest.config.ts, vi.mock, browser mode, vitest/browser, projects, setupFiles, and toMatchScreenshot.
Comprehensive React development guide covering component architecture, hooks, state management, TypeScript integration, useEffect patterns, and testing with Vitest. Use when creating React components, custom hooks, managing state, or any frontend React code. Essential for React 19+ development.
This skill should be used when the user asks to "create a TypeScript project", "set up Node.js project", "scaffold new project", "initialize TypeScript repo", "create a new library", "set up a CLI tool", or mentions setting up a new TypeScript/Node.js codebase.