rollup.config.js

const camelCase = require('lodash.camelcase');
const commonjs = require('rollup-plugin-commonjs');
const json = require('rollup-plugin-json');
const resolve = require('rollup-plugin-node-resolve');
const sourceMaps = require('rollup-plugin-sourcemaps');
const typescript = require('rollup-plugin-typescript2');
const versionInjector = require('rollup-plugin-version-injector');

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

const libraryName = 'ramp-instant-sdk';

module.exports = {
  input: `src/${libraryName}.ts`,
  output: [
    { file: pkg.main, name: camelCase(libraryName), format: 'umd', sourcemap: true },
    { file: pkg.module, format: 'es', sourcemap: true },
  ],
  // Indicate here external modules you don't wanna include in your bundle (i.e.: 'lodash')
  external: [],
  watch: {
    include: 'src/**',
  },
  plugins: [
    // Allow json resolution
    json(),
    // Compile TypeScript files
    typescript({
      useTsconfigDeclarationDir: true,
      objectHashIgnoreUnknownHack: false,
      clean: true,
    }),
    // Allow bundling cjs modules (unlike webpack, rollup doesn't understand cjs)
    commonjs(),
    // Allow node_modules resolution, so you can use 'external' to control
    // which external modules to include in the bundle
    // https://github.com/rollup/rollup-plugin-node-resolve#usage
    resolve(),

    // Resolve source maps to the original source
    sourceMaps(),

    // Inject package.json['version']
    versionInjector(),
  ],
};