react-smooth-slider/rollup.config.js

import babel from 'rollup-plugin-babel';
import resolve from 'rollup-plugin-node-resolve';
import { uglify } from 'rollup-plugin-uglify';
import { minify } from 'uglify-es';

const name = 'SmoothScroller';
const path = 'dist/react-smooth-scroller';
const globals = {
  react: 'React',
  'prop-types': 'PropTypes',
  'react-router-dom': 'ReactRouterDOM'
};
const external = Object.keys(globals);
const babelOptions = production => {
  let result = {
    babelrc: false,
    presets: [['@babel/preset-env', { modules: false }], '@babel/preset-react'],
    plugins: ['@babel/plugin-proposal-class-properties']
  };
  if (production) {
    result.plugins.push('transform-react-remove-prop-types');
  }
  return result;
};

export default [
  {
    input: 'src/index.js',
    output: {
      file: path + '.js',
      format: 'es'
    },
    external: external,
    plugins: [babel(babelOptions(false))]
  },
  {
    input: 'src/index.umd.js',
    output: {
      name: name,
      file: path + '.js',
      format: 'umd',
      globals: globals,
    },
    external: external,
    plugins: [
      babel(babelOptions(false)),
      resolve(),
    ],
  },
  {
    input: 'src/index.umd.js',
    output: {
      name: name,
      file: path + '.min.js',
      format: 'umd',
      globals: globals,
    },
    external: external,
    plugins: [
      babel(babelOptions(true)),
      resolve(),
      uglify({}, minify),
    ],
  },
];