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tsdown is a fast and elegant TypeScript library bundler powered by Rolldown and Oxc
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| name | tsdown |
| description | tsdown is a fast and elegant TypeScript library bundler powered by Rolldown and Oxc |
| metadata | {"author":"Anthony Fu","version":"2026.1.28","source":"Generated from https://github.com/rolldown/tsdown, scripts located at https://github.com/antfu/skills"} |
tsdown is a next-generation TypeScript library bundler built on Rolldown and Oxc. It provides blazing-fast builds, automatic .d.ts generation, and seamless migration from tsup. Supports Rolldown/Rollup/Unplugin plugins and features smart dependency handling.
This documentation is based on tsdown v0.20.1.
Anthony's Preferences:
dts option for type declarationsexports option for auto-generated package exports| Topic | Description | Reference |
|---|---|---|
| Configuration | Config file setup, defineConfig, multiple configs | core-config |
| CLI | Command-line interface and options | core-cli |
| Entry Points | Entry files, aliases, glob patterns | core-entry |
| Topic | Description | Reference |
|---|---|---|
| Output | Format (ESM/CJS/IIFE/UMD), directory, target, platform | options-output |
| Declaration Files | .d.ts generation, isolatedDeclarations, sourcemaps | options-dts |
| Dependencies | External, noExternal, dependency bundling | options-dependencies |
| Package Exports | Auto-generating exports, main, module fields | options-package-exports |
| Topic | Description | Reference |
|---|---|---|
| Optimization | Tree shaking, minification, sourcemaps | features-optimization |
| Shims | CJS/ESM compatibility shims | features-shims |
| Unbundle Mode | Bundleless transpile-only builds | features-unbundle |
| Watch Mode | Auto-rebuild on file changes | features-watch |
| Topic | Description | Reference |
|---|---|---|
| Plugins | Rolldown, Unplugin, Rollup, Vite plugins | advanced-plugins |
| Hooks | Build lifecycle hooks | advanced-hooks |
| Programmatic API | Using tsdown from code | advanced-programmatic |
| Rolldown Options | Customizing inputOptions and outputOptions | advanced-rolldown-options |
| Topic | Description | Reference |
|---|---|---|
| Framework Support | Vue and React library bundling | recipes-frameworks |
| Migration | Migrating from tsup | recipes-migration |