rollup.config.js

import filesize from 'rollup-plugin-filesize'
import resolve from 'rollup-plugin-node-resolve'
import babel from 'rollup-plugin-babel'

const pkg = require('./package.json')

const name = pkg.name

export default {
  input: 'src/index.js',
  external: ['stimulus'],
  output: [
    {
      file: 'dist/index.js',
      format: 'cjs',
      sourcemap: true,
    },
    {
      file: 'dist/index.m.js',
      format: 'es',
      sourcemap: true,
    },
    {
      file: 'dist/index.umd.js',
      format: 'umd',
      name,
      sourcemap: true,
      globals: {
        stimulus: 'Stimulus',
      },
    },
  ],
  plugins: [
    resolve(),
    babel({
      exclude: 'node_modules/**',
    }),
    filesize(),
  ],
}