Rollup with all the trimmings

rollup_with_all_the_trimmings.js

const rollup = require('rollup')
const nodeResolve  = require('rollup-plugin-node-resolve')
const commonjs = require('rollup-plugin-commonjs')
const json = require('rollup-plugin-json')

rollup.rollup({
  entry: 'index.js',
  plugins: [
    json(),
    nodeResolve({
      main: true,
      extensions: [ '.js', '.json' ]
    }),
    commonjs()
  ]
}).then(function (bundle) {
  return bundle.write({
    format: 'cjs',
    dest: 'bundle.js',
    useStrict: false
  })
}).catch(console.log.bind(console))