rollup.module.config.js

import commonjs from '@rollup/plugin-commonjs'
import globals from './rollup.globals.js'
import pkg from './package.json'
import replace from '@rollup/plugin-replace'
import resolve from '@rollup/plugin-node-resolve'
import { babel } from '@rollup/plugin-babel'
import { nodeResolve } from '@rollup/plugin-node-resolve'
import url from '@rollup/plugin-url'
import json from '@rollup/plugin-json'

export default {
  input: 'src/index.js',
  output: [
    // {
    //   format: 'es',
    //   globals: globals,
    //   file: 'dist/esm/index.js'
    // },
    {
      format: 'umd',
      name: pkg.moduleName,
      globals: globals,
      file: 'dist/umd/index.js'
    },
  ],
  external: [
    ...Object.keys(pkg.dependencies || {}),
    ...Object.keys(pkg.peerDependencies || {})
    // 'secp256k1'
  ],
  plugins: [
    url(),
    json(),
    resolve({
      extensions: ['.js', '.ts', '.jsx'],
      modulesOnly: true,
      preferBuiltins: false
    }),
    babel({
      babelHelpers: 'runtime',
      plugins: [
        '@babel/transform-runtime'
      ],
      exclude: ['node_modules/**'] // only transpile our source code
    }),
    nodeResolve({ preferBuiltins: false }),
    commonjs({
      include: 'node_modules/**'
    }),
    replace({
      'process.env.NODE_ENV': JSON.stringify( 'production' ),
      preventAssignment: true
    }),
  ]
}