Can I migrate from tsup to tsdown?

Yes, tsdown includes a built-in migration tool called tsdown-migrate that helps you transition your existing tsup configurations with minimal changes.

Does tsdown support React and Vue component libraries?

Yes, it provides built-in support for JSX transforms and specialized recipes for bundling components for React, Vue, Solid, and Svelte.

How does tsdown handle type declarations?

By setting the dts option to true in your configuration, tsdown automatically generates .d.ts files, ensuring your library remains fully typed for consumers.

What is tsdown used for?

tsdown is a high-performance bundler specifically designed for creating TypeScript and JavaScript libraries, offering significantly faster build times than traditional tools like tsup.

What makes tsdown faster than other bundlers?

It leverages the speed of Rolldown (a Rust-based bundler) and Oxc (a high-performance parser) to handle code transformation and bundling much faster than JavaScript-based alternatives.

tsdown - Fast Library Bundler

Name: tsdown - Fast Library Bundler
Author: pleaseai

bypleaseai

•

Developer Tools

Bundles TypeScript and JavaScript libraries with extreme speed using Rolldown and Oxc.

tsdown is a high-performance library bundler designed for the modern TypeScript ecosystem, offering a blazing-fast alternative to tsup. Built on top of Rolldown and Oxc, it streamlines the creation of production-ready packages by automating type declaration generation, supporting multiple output formats like ESM and CJS, and providing advanced optimizations like tree shaking and minification. Whether you are building a small utility or a complex framework component library, tsdown provides the speed and flexibility required for efficient modern development.

Key Features

01Seamless migration path from tsup with dedicated migration tools

02High-speed bundling powered by Rust-based Rolldown and Oxc

033 GitHub stars

04Advanced tree shaking, minification, and shim support for ESM/CJS compatibility

05Automatic TypeScript declaration (.d.ts) generation

06Support for ESM, CJS, IIFE, and UMD output formats

Use Cases

01Migrating existing tsup-based projects to a faster build pipeline

02Creating cross-platform component libraries for React, Vue, or Svelte

03Building and publishing high-performance TypeScript libraries to npm

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add pleaseai/claude-code-plugins tsdown

For use in Claude.ai and ChatGPT

Key Features

01Seamless migration path from tsup with dedicated migration tools

02High-speed bundling powered by Rust-based Rolldown and Oxc

033 GitHub stars

04Advanced tree shaking, minification, and shim support for ESM/CJS compatibility

05Automatic TypeScript declaration (.d.ts) generation

06Support for ESM, CJS, IIFE, and UMD output formats

Use Cases

01Migrating existing tsup-based projects to a faster build pipeline

02Creating cross-platform component libraries for React, Vue, or Svelte

03Building and publishing high-performance TypeScript libraries to npm

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add pleaseai/claude-code-plugins tsdown

For use in Claude.ai and ChatGPT