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Software Engineering•January 4, 2024•8 min read

Bun: Fast JavaScript Runtime and Toolkit

Bun provides a fast JavaScript runtime with built-in bundling, testing, and package management.

#bun#javascript#runtime#typescript

Bun is a JavaScript runtime focused on speed. Built-in bundler eliminates separate tooling. Native TypeScript support without configuration. Package manager installs dependencies rapidly.

Core Features

Runtime executes JavaScript and TypeScript. Bundler produces optimized bundles. Test runner provides Jest-compatible testing. Package manager replaces npm/yarn/pnpm.

  • Run TypeScript directly without transpilation
  • Use built-in bundler for production builds
  • Write tests with Jest-compatible APIs
  • Install packages faster than npm
  • Use Bun APIs for file system and HTTP

Migration Considerations

Node.js compatibility covers most packages. Some native modules require Bun-specific builds. Evaluate your dependencies before migrating. Consider gradual adoption starting with development tools.

Tags

bunjavascriptruntimetypescriptperformance

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