rollup.config.js

import peerDepsExternal from 'rollup-plugin-peer-deps-external'
import alias from 'rollup-plugin-alias'
import babel from 'rollup-plugin-babel'
import commonjs from 'rollup-plugin-commonjs'
import json from 'rollup-plugin-json'
import filesize from 'rollup-plugin-filesize'
import resolve from 'rollup-plugin-node-resolve'
import replace from 'rollup-plugin-replace'
import { eslint } from 'rollup-plugin-eslint'
import cleaner from 'rollup-plugin-cleaner'
import { uglify } from 'rollup-plugin-uglify'
import browserifyPlugin from 'rollup-plugin-browserify-transform'
import brfs from 'brfs'

const aliases = require('./aliases')

const stripFSInterop = function() {
  return {
    renderChunk(code) {
      code = code.replace("var fs = _interopDefault(require('fs'));", "var fs = require('fs');")
      return {
        code,
        map: null,
      }
    },
  }
}

const defaultPlugins = [
  cleaner({
    targets: ['./build/'],
  }),
  eslint({
    include: 'src/**',
  }),
  peerDepsExternal(),
  json(),
  alias(aliases),
  replace({
    'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV || 'development'),
  }),
  resolve({
    module: true,
    browser: true,
    jsnext: true,
  }),
  commonjs({
    include: 'node_modules/**',
  }),
  // browserifyPlugin(brfs, {
  //   include: [
  //     'node_modules/pdfkit/**',
  //     'node_modules/brotli/**',
  //     'node_modules/fontkit/**',
  //     // 'node_modules/linebreak/**',
  //     // 'node_modules/png-js/**',
  //     'node_modules/unicode-properties/**',
  //   ],
  // }),
  babel({
    babelrc: false,
    presets: [
      [
        '@babel/preset-env',
        {
          modules: false,
          targets: {
            browsers: ['Firefox 57', 'Edge 15', 'Chrome 60', 'iOS 10', 'Safari 10'],
          },
        },
      ],
    ],
    plugins: [
      ['@babel/plugin-proposal-decorators', { legacy: true }],
      '@babel/plugin-proposal-class-properties',
      '@babel/plugin-proposal-object-rest-spread',
      '@babel/plugin-transform-runtime',
    ],
    runtimeHelpers: true,
    externalHelpers: true,
  }),
  stripFSInterop(),
  filesize(),
]

if (process.env.NODE_ENV === 'production') {
  defaultPlugins.push(
    uglify({
      compress: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
        warnings: false,
      },
    })
  )
}
export default {
  input: 'src/worker/worker.js',
  output: {
    file: 'build/pdf-worker.js',
    format: 'umd',
    name: 'PDFGeneratorWorker',
    sourcemap: true,
  },
  plugins: defaultPlugins,
}