Use Bun instead of Node.js, npm, pnpm, or vite. Provides command mappings, Bun-specific APIs, and development patterns.

Bun Runtime Use Bun as the default JavaScript/TypeScript runtime and package manager. Command Mappings Instead of Use node file.ts bun file.ts ts node file.ts bun file.ts npm install bun install npm run script bun run script jest / vitest bun test webpack / esbuild bun build Bun automatically loads .env files don't use dotenv. Bun Specific APIs Prefer these over Node.js equivalents: API Purpose Don't use Bun.serve() HTTP server with WebSocket, HTTPS, routes express bun:sqlite SQLite database better sqlite3 Bun.redis Redis client ioredis Bun.sql Postgres client pg, postgres.js Bun.file() File operations node:fs readFile/writeFile Bun.$\ cmd\ Shell commands execa WebSocket WebSocket client (built in) ws Testing Use bun:test for tests: Run with bun test . Frontend Development Use HTML imports with Bun.serve() instead of Vite. Supports React, CSS, Tailwind. Server: HTML file: Bun's bundler transpiles .tsx , .jsx , .js automatically. CSS is bundled via <link tags. Run with bun hot ./server.ts for HMR. Documentation For detailed API docs, see node modules/bun types/docs/ .md .