rollup.config.js

import json from 'rollup-plugin-json';
import babel from 'rollup-plugin-babel';
import nodeResolve from 'rollup-plugin-node-resolve';
import {terser} from 'rollup-plugin-terser';
import filesize from 'rollup-plugin-filesize';
import commonjs from 'rollup-plugin-commonjs';
import builtins from 'rollup-plugin-node-builtins';
import globals from 'rollup-plugin-node-globals';
import hypothetical from 'rollup-plugin-hypothetical';
import ignore from 'rollup-plugin-ignore';

const name = `irisLib`;

const plugins = [
  ignore(['gun/lib/then', 'gun/lib/load']),
  hypothetical({
    allowFallthrough: true,
    files: {
      'node-webcrypto-ossl/': `
        export default {};
      `,
      'text-encoding/': `
        export default {};
      `,
      '@trust/webcrypto/': `
        export default {};
      `
    }
  }),
  json(),
  babel({
    exclude: 'node_modules/**',
    plugins: ['external-helpers', 'transform-runtime'],
    runtimeHelpers: true
  }),
  builtins(),
  nodeResolve({
    module: true,
    jsnext: true,
    browser: true,
  }),
  commonjs({
    include: `node_modules/**`
  }),
  filesize(),
  globals()
];

const isProd = process.env.NODE_ENV === `production`;
if (isProd) plugins.push(terser());

export default {
  input: `src/index.js`,
  external: ['gun'],
  plugins,
  output: {
    file: `dist/${name}${isProd ? `.min` : ``}.js`,
    name,
    format: `umd`,
    globals: {
      gun: 'Gun'
    }
  }
};