tsdown

Name: tsdown
Availability: InStock
Author: elzafon

Bundle TypeScript and JavaScript libraries into multiple formats with Rolldown.

Updated Aug 23, 2026

Search Tags:#typescript #javascript #library #bundle #build-system #rolldown

Ready to run

npx skills add https://github.com/elzafon/ziska-next --skill tsdown-elzafon

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: tsdown
Source: https://github.com/elzafon/ziska-next/tree/main/.agents/skills/tsdown
Command: npx skills add https://github.com/elzafon/ziska-next --skill tsdown-elzafon

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Bundling TypeScript and JavaScript libraries is made fast and simple by providing a unified toolchain powered by Rolldown, addressing the pain of lengthy, brittle setups.

Core Features & Use Cases

Multi-format bundles (ESM, CJS, IIFE, UMD) for npm libraries
Automatic TypeScript declarations generation and DTS support
Rich plugin ecosystem and workspace/monorepo support
CI-friendly options and migrations from tsup
Cross-framework compatibility for React, Vue, Solid, and Svelte libraries

Quick Start

Install tsdown as a dev dependency and run it to start bundling your library with a single command.

Frequently Asked Questions about tsdown

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

What is the best way to bundle TypeScript libraries for multiple npm formats?▼

Bundling TypeScript libraries for multiple npm formats is best handled by a unified toolchain that generates ESM, CJS, IIFE, and UMD outputs. This approach replaces lengthy setups with config-driven options for cross-format builds.

How do I generate TypeScript declarations when bundling my npm package?▼

To generate TypeScript declarations when bundling your npm package, use a build system with automatic DTS generation support. This outputs type definitions alongside your ESM and CJS bundles.

Can I use Rolldown to bundle libraries for React, Vue, Solid, and Svelte?▼

Yes, you can use Rolldown to bundle libraries for React, Vue, Solid, and Svelte. It provides cross-framework compatibility to package component libraries for various ecosystems.

How do I migrate my TypeScript library build from tsup to a faster tool?▼

Migrating your TypeScript library build from tsup to a faster tool involves switching to a Rolldown-powered toolchain. This provides blazing-fast build speed while maintaining CI-friendly options.

Does this TypeScript bundling tool support workspace and monorepo builds?▼

Yes, this TypeScript bundling tool supports workspace and monorepo builds. It includes specific workspace support alongside a rich plugin ecosystem to manage multi-package repositories.