react-library-template

Starter for creating React library

• npm init
• add react to peerDependencies

Rollup setup

• check https://medium.com/webpack/webpack-and-rollup-the-same-but-different-a41ad427058c
• use Rollup if library is tree-shakeable to export esm bundle referenced in "module" in package.json
• add rollup.config.js
• check https://github.com/rollup/rollup-starter-lib (config file format is little bit changed than in this example)
• install plugins "rollup-plugin-node-resolve", "rollup-plugin-commonjs" and "rollup-plugin-babel"
• "rollup-plugin-node-resolve" is used to resolve 3rd party modules (from node_modules) imported by library
• "rollup-plugin-commonjs" is used to convert commonjs modules to ES modules
• Those 2 plugins are basically required if library has any npm dependency
• "rollup-plugin-babel" could use setup from .babelrc if Babel 7+ is used
• add name (library name), external and globals (React, ReactDOM, PropTypes asnd similar) options for umd build
• for "es" build we don't use "commonjs" and "resolve" plugins, only ES modules are used!

• setup eslint: https://www.npmjs.com/package/eslint-config-react-app https://reactjs.org/docs/hooks-rules.html
• setup jest: https://jestjs.io/docs/en/getting-started.html