Database

Bun's built-in bundler: Bun.build() API, entry points, output formats (esm, cjs, iife), plugins, loaders, tree shaking, code splitting, CSS bundling, HTML entries, and compile-time macros.

Bun runtime overview: all-in-one JavaScript runtime, bundler, test runner, and package manager. Installation, project initialization, Node.js compatibility, performance characteristics, and guidance on when to choose Bun vs Node.

Building HTTP servers with Bun: Bun.serve() API, routing patterns, WebSocket support, streaming responses, static file serving, TLS configuration, hot reloading, and integration with frameworks like Hono and Elysia.

Migrating from Node.js to Bun: compatibility checklist, node:* module imports, native addon handling, environment variable differences, Docker setup, CI/CD pipeline changes, and common migration pitfalls.

Bun as a package manager: bun install, bun add, bun remove, the binary lockfile (bun.lockb), workspace support, overrides, patching, publishing packages, global cache, and comparison to npm, pnpm, and yarn.

Production patterns for Bun: Docker deployments, TypeScript configuration, shell scripting with Bun.$, monorepo setup, database access patterns, and deployment to Fly.io and Railway.

Bun-native runtime APIs including Bun.serve(), Bun.file(), Bun.write(), Bun.spawn(), Bun.sleep(), Bun.env, FFI for calling native libraries, built-in SQLite, S3 client, glob, and semver utilities.

Bun's built-in test runner: bun test command, describe/it/expect assertions, mocking and spies, snapshot testing, lifecycle hooks, DOM testing with happy-dom, code coverage, and watch mode.