rollup.config.js

import commonjs from 'rollup-plugin-commonjs'
import nodeResolve from 'rollup-plugin-node-resolve'
import babel from 'rollup-plugin-babel'
import uglify from 'rollup-plugin-uglify'

export default {
	entry: 'src/index.js',
	sourceMap: true,

	plugins: [
		nodeResolve({

			// use "module" field for ES6 module if possible
			//module: true, // Default: true

			// use "jsnext:main" if possible
			// – see https://github.com/rollup/rollup/wiki/jsnext:main
			jsnext: true,  // Default: false

			// use "main" field or index.js, even if it's not an ES6 module
			// (needs to be converted from CommonJS to ES6
			// – see https://github.com/rollup/rollup-plugin-commonjs
			//main: true,  // Default: true

			// some package.json files have a `browser` field which
			// specifies alternative files to load for people bundling
			// for the browser. If that's you, use this option, otherwise
			// pkg.browser will be ignored
			browser: true,  // Default: false

			// not all files you want to resolve are .js files
			// extensions: [ '.js', '.json' ],  // Default: ['.js']

			// whether to prefer built-in modules (e.g. `fs`, `path`) or
			// local ones with the same names
			// preferBuiltins: false,  // Default: true

			// Lock the module search in this path (like a chroot). Module defined
			// outside this path will be mark has external
			//jail: '/my/jail/path', // Default: '/'

			// If true, inspect resolved files to check that they are
			// ES2015 modules
			//modulesOnly: true, // Default: false

			// Any additional options that should be passed through
			// to node-resolve
			//customResolveOptions: {
			//  moduleDirectory: 'js_modules'
			//}
		}),

		commonjs({
			// non-CommonJS modules will be ignored, but you can also
			// specifically include/exclude files
			//include: 'node_modules/**',  // Default: undefined
			//exclude: [ 'node_modules/foo/**', 'node_modules/bar/**' ],  // Default: undefined

			// search for files other than .js files (must already
			// be transpiled by a previous plugin!)
			//extensions: [ '.js', '.coffee' ],  // Default: [ '.js' ]

			// if true then uses of `global` won't be dealt with by this plugin
			//ignoreGlobal: false,  // Default: false

			// if false then skip sourceMap generation for CommonJS modules
			//sourceMap: false,  // Default: true

			// explicitly specify unresolvable named exports
			// (see below for more details)
			//namedExports: { './module.js': ['foo', 'bar' ] },  // Default: undefined

			// sometimes you have to leave require statements
			// unconverted. Pass an array containing the IDs
			// or a `id => boolean` function. Only use this
			// option if you know what you're doing!
			//ignore: [ 'conditional-runtime-dependency' ]
		}),

		babel({

		})
	].concat(
		process.env.NODE_ENV == 'production' ? [
			uglify({
				screw_ie8: true,
			})
		] : []
	)
};