Vitest - Modern TypeScript Testing

Overview

Vitest is a next-generation test framework powered by Vite, designed for modern TypeScript/JavaScript projects. It provides blazing-fast test execution through HMR-based test running, native ESM support, and first-class TypeScript integration.

Key Features:

• ⚡ Vite-native: Instant HMR-based test execution (10-100x faster than Jest)
• 🎯 TypeScript-first: Built-in TypeScript support, no configuration needed
• 🔄 ESM-native: Native ES modules, async/await, top-level await
• 🧪 Jest-compatible: Compatible API for easy migration
• 📸 Snapshot testing: Built-in snapshot support
• 🎨 Component testing: React Testing Library, Vue Test Utils integration
• 📊 Coverage: Built-in v8/c8 coverage (faster than Istanbul)
• 🌐 UI mode: Beautiful web UI for test debugging