Zero-config TypeScript package development
Last updated a year ago by gbozee .
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$ cnpm install @gbozee/tsdx 
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Despite all the recent hype, setting up a new TypeScript (x React) library can be tough. Between Rollup, Jest, tsconfig, Yarn resolutions, TSLint, and getting VSCode to play nicely....there is just a whole lot of stuff to do (and things to screw up). TSDX is a zero-config CLI that helps you develop, test, and publish modern TypeScript packages with ease--so you can focus on your awesome new library and not waste another afternoon on the configuration.


TSDX comes with the "battery-pack included" and is part of a complete TypeScript breakfast:

  • Bundles your code with Rollup and outputs multiple module formats (CJS, UMD & ESM) plus development and production builds
  • Comes with treeshaking, ready-to-rock lodash optimizations, and minification/compression
  • Live reload / watch-mode
  • Works with React
  • Human readable error messages (and in VSCode-friendly format)
  • Bundle size snapshots
  • Jest test runner setup with sensible defaults via tsdx test
  • Zero-config, single dependency

Quick Start

npx tsdx create mylib
cd mylib
yarn start

That's it. You don't need to worry about setting up Typescript or Rollup or Jest or other plumbing. Just start editing src/index.ts and go!

Below is a list of commands you will probably find useful.

npm start or yarn start

Runs the project in development/watch mode. Your project will be rebuilt upon changes. TSDX has a special logger for your convenience. Error messages are pretty printed and formatted for compatibility VS Code's Problems tab.

Your library will be rebuilt if you make edits.

npm run build or yarn build

Bundles the package to the dist folder. The package is optimized and bundled with Rollup into multiple formats (CommonJS, UMD, and ES Module).

npm test or yarn test

Runs the test watcher (Jest) in an interactive mode. By default, runs tests related to files changed since the last commit.


TSDX is ripped out of Formik's build tooling. TSDX is very similar to @developit/microbundle, but that is because Formik's Rollup configuration and Microbundle's internals have converged around similar plugins over the last year or so.

Comparison to Microbundle

  • TSDX includes out-of-the-box test running via Jest
  • TSDX includes a bootstrap command and default package template
  • TSDX is 100% TypeScript focused. While yes, TSDX does use Babel to run a few optimizations (related to treeshaking and lodash), it does not support custom babel configurations.
  • TSDX outputs distinct development and production builds (like React does) for CJS and UMD builds. This means you can include rich error messages and other dev-friendly goodies without sacrificing final bundle size.

API Reference

tsdx watch

  Rebuilds on any change

  $ tsdx watch [options]

  -i, --entry    Entry module(s)
  --target       Specify your target environment  (default web)
  --name         Specify name exposed in UMD builds
  --format       Specify module format(s)  (default cjs,es,umd)
  -h, --help     Displays this message

  $ tsdx watch --entry src/foo.tsx
  $ tsdx watch --target node
  $ tsdx watch --name Foo
  $ tsdx watch --format cjs,es

tsdx build

  Build your project once and exit

  $ tsdx build [options]

  -i, --entry    Entry module(s)
  --target       Specify your target environment  (default web)
  --name         Specify name exposed in UMD builds
  --format       Specify module format(s)  (default cjs,es,umd)
  -h, --help     Displays this message

  $ tsdx build --entry src/foo.tsx
  $ tsdx build --target node
  $ tsdx build --name Foo
  $ tsdx build --format cjs,es

tsdx test

This runs Jest v24.x in watch mode. See https://jestjs.io for options. If you are using the React template, jest uses the flag --env=jsdom by default.




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