tsdown

# tsdown - The Elegant Library Bundler Blazing-fast bundler for TypeScript/JavaScript libraries powered by Rolldown and Oxc. ## When to Use - Building TypeScript/JavaScript libraries for npm - Generating TypeScript declaration files (.d.ts) - Bundling for multiple formats (ESM, CJS, IIFE, UMD) - Optimizing bundles with tree shaking and minification - Migrating from tsup with minimal changes - Building React, Vue, Solid, or Svelte component libraries ## Quick Start ```bash # Install pnpm add -D tsdown # Basic usage npx tsdown # With config file npx tsdown --config tsdown.config.ts # Watch mode npx tsdown --watch # Migrate from tsup npx tsdown-migrate ``` ## Basic Configuration ```ts import { defineConfig } from 'tsdown' export default defineConfig({ entry: ['./src/index.ts'], format: ['esm', 'cjs'], dts: true, clean: true, }) ``` ## Core References | Topic | Description | Reference | |-------|-------------|-----------| | Getting Started | Installation, first bundle, CLI basics | [guide-getting-started](references/guide-getting-started.md) | | Configuration File | Config file formats, multiple configs, workspace | [option-config-file](references/option-config-file.md) | | CLI Reference | All CLI commands and options | [reference-cli](references/reference-cli.md) | | Migrate from tsup | Migration guide and compatibility notes | [guide-migrate-from-tsup](references/guide-migrate-from-tsup.md) | | Plugins | Rolldown, Rollup, Unplugin support | [advanced-plugi...