rollup.config.js

import json from '@rollup/plugin-json';
import nodePolyfills from 'rollup-plugin-node-polyfills';
import resolve from '@rollup/plugin-node-resolve';
import sourceMaps from "rollup-plugin-sourcemaps";
import webWorkerLoader from 'rollup-plugin-web-worker-loader';
import commonjs from '@rollup/plugin-commonjs';
import pkg from "./package.json";
import typescript from 'rollup-plugin-typescript2';

export default {
  input: 'src/index.ts',
  plugins: [
    json(),
    typescript({
      useTsconfigDeclarationDir: true,
      tsconfigOverride: {
        compilerOptions: {
          target: "ES6"
        },
      },
    }),
    commonjs(),
    nodePolyfills(),
    resolve({
      preferBuiltins: false,
      browser: true,
    }),
    sourceMaps(),
    webWorkerLoader({
      targetPlatform: 'browser',
    }),
  ],
  output: [
    {
      format: 'es',
      file: pkg.main,
      sourcemap: true,
      exports: "named"
    }
  ],
  watch: {
    include: "src/**"
  },
};