viteup [](https://www.npmjs.com/package/viteup)

Disclaimer

This software is experimental.

Description

A better (opinionated) way to compile your TypeScript libraries, powered by Vite + SWC.

• Output format(s) & directory derived from package.json exports & other package.json fields.
• SWC compiler integration with vite-plugin-swc-transform by default
• Zero-to-minimal configuration required, freedom to override

Installation

npm i --save-dev viteup

Note: if you plan on using a different compiler than SWC, you can avoid installing the vite-plugin-swc-transform dependency:

npm i --save-dev --no-optional viteup

Example Usage

• Add a package.json exports or output field to your package.json file
• Add a "build" script to your package.json file

{
  "name": "my-library",
  "type": "module",
  "exports": "./dist/index.js",
  "scripts": {
    "build": "viteup"
  }
}

Build.

npm run build

Advanced Usage

Examples of package.json setup for ESM or CommonJS, or both

CommonJS output only for maximum compatibility

{
  "name": "my-library",
  "type": "commonjs",
  "main": "./dist/index.js",
  "scripts": {
    "build": "viteup"
  }
}

CommonJS output only for "modern module resolution"-capable consumers

{
  "name": "my-library",
  "type": "commonjs",
  "exports": "./dist/index.js",
  "scripts": {
    "build": "viteup"
  }
}

ESM output only for broad compatibility

{
  "name": "my-library",
  "module": "./dist/index.mjs",
  "scripts": {
    "build": "viteup"
  }
}

ESM output only for "modern module resolution"-capable consumers

{
  "name": "my-library",
  "type": "module",
  "exports": "./dist/index.js",
  "scripts": {
    "build": "viteup"
  }
}

Dual emit CommonJS + ESM output for "modern module resolution"-capable consumers

{
  "name": "my-library",
  "type": "module",
  "exports": {
    "require": "./dist/index.cjs",
    "default": "./dist/index.js"
  },
  "scripts": {
    "build": "viteup"
  }
}

Dual emit CommonJS + ESM output for maximum compatibility

{
  "name": "my-library",
  "type": "commonjs",
  "main": "./dist/index.js",
  "module": "./dist/index.mjs",
  "exports": {
    "require": "./dist/index.js",
    "default": "./dist/index.mjs"
  },
  "scripts": {
    "build": "viteup"
  }
}

Extending or overriding Vite configuration

• FIXME

JavaScript API

• FIXME

Integration with Vitest

• FIXME

Support

Package.json output fields support

• FIXME

Package.json export conditions support

• FIXME