react-video-scroll-ssr/rollup.config.js

A React component to seek or control the video frame rate on scroll.

import babel from 'rollup-plugin-babel'
import uglify from 'rollup-plugin-uglify'
import replace from 'rollup-plugin-replace'
import pkg from './package.json'

const makeExternalPredicate = externalArr => {
  if (externalArr.length === 0) {
    return () => false;
  }
  const pattern = new RegExp(`^(${externalArr.join("|")})($|/)`);
  return id => pattern.test(id);
}

const ensureArray = maybeArr => Array.isArray(maybeArr) ? maybeArr : [maybeArr]

const createConfig = ({
  output,
  min = false,
  env,
} = {}) => ({
  input: 'src/VideoScroll.js',
  output: ensureArray(output).map(format => Object.assign({}, format, {
    name: 'VideoScroll',
    exports: 'named',
    globals: {
      react: 'React',
      'prop-types': 'PropTypes',
    },
  })),
  external: makeExternalPredicate([
    ...Object.keys(pkg.dependencies || {}),
    ...Object.keys(pkg.peerDependencies || {}),
  ]),
  plugins: [
    babel({ plugins: ['external-helpers'] }),
    env && replace({ 'process.env.NODE_ENV': JSON.stringify(env) }),
    min && uglify(),
  ].filter(Boolean),
})

export default [
  createConfig({
    output: [
      { file: pkg.main, format: 'cjs' },
      { file: pkg.module, format: 'es' },
    ],
  }),
  createConfig({
    output: { file: pkg.unpkg, format: 'umd' },
    env: 'production',
    min: true,
  })
]