📚 rollup-jest-boilerplate

Full featured boilerplate for building JavaScript libraries the modern way.

Features

• 📜 Rollup.js configuration providing compatibility with different module systems (CommonJS, ECMAScript, UMD for <script> tags)
• 🃏 Jest setup with watch mode working
• 🛀 Renovate configuration for auto updates (you have to activate it via https://github.com/apps/renovate)
• 🐈 Yarn with lock file, pinned devDependencies and fixed Yarn version in .yarnrc using Yarn policies
• ✅ Travis CI
• 🏗 .nvmrc file to enforce the Node.js version for contributors and continuous integration
• ⚡️ Ready to publish and use

How to use

Decide of a new library name, let's say new-super-library (🤦🏼‍♀️), then in a terminal:

curl --output rollup-jest-boilerplate.zip -LOk https://github.com/algolia/rollup-jest-boilerplate/archive/master.zip
unzip rollup-jest-boilerplate.zip
rm rollup-jest-boilerplate.zip
mv rollup-jest-boilerplate-master new-super-library

Next steps:

• search the project for rollup-starter-lib and replace everywhere with new-super-library
• start coding in src/main.js
• profit 💸

Live examples

Those examples are using the live published version of this boilerplate library on npm and they run with CodeSandbox.

• ECMAScript
• CommonJS
• UMD, this leverages jsDelivr npm CDN

Developer environment requirements

To run this project, you will need:

• Node.js >= v10.5.0, use nvm - install instructions
• Yarn >= v1.7.0 - install instructions ("Alternatives" tab)

Running tests

yarn
yarn test
yarn test --watch

Dev mode

When developing you can run:

yarn watch

This will regenerate the build files each time a source file is changed and serve on http://127.0.0.1:5000.

Previewing umd build in the browser

If your package works in the browser, you can open dev/index.html to try it out.

Publishing

npm publish

Additional tooling

Based on your need, you might want to add:

• ESLint and Prettier
• TypeScript support
• Monorepo support with Lerna
• CHANGELOG.md generation with conventional-changelog

If so, please do and open pull requests when you feel like it.

Original idea

I initially used rollup/rollup-starter-lib but really needed that Jest support so I did it.