build.js

const browserify = require('browserify');
const fs = require('fs');
const request = require('request');
const uglify = require('uglify-js');

const bundle = browserify({ standalone: 'EasyMediasoup', debug: false });
bundle.add('./es5-bundle/index');
bundle.bundle(function (err, source) {
  if (err) {
    console.error(err);
  }
  fs.writeFileSync('dist/easy-mediasoup.bundle.js', source)
  minimize();
  // fs.writeFileSync('dist/easy-mediasoup.bundle.min.js', uglify.minify('dist/easy-mediasoup.bundle.js'));

  // uglify.minify({"dist/easy-mediasoup.bundle.js": "compiled code"}, {
  //   sourceMap: {
  //       content: "content from compiled.js.map",
  //       url: "minified.js.map"
  //   }
  // })
  // const adapter = fs.readFileSync('node_modules/webrtc-adapter/out/adapter.js').toString();
  // fs.writeFileSync('out/simplewebrtc-with-adapter.bundle.js', `${adapter}\n${source}`);
});

function minimize(){
  //get a reference to the minified version of file-1.js
  var result = uglify.minify(["dist/easy-mediasoup.bundle.js"]);


  fs.writeFile("dist/easy-mediasoup.bundle.min.js", result.code, function(err) {
      if(err) {
          console.log(err);
      } else {
          console.log("File was successfully saved.");
      }
  });

  //https://skalman.github.io/UglifyJS-online/
}