Webpack bootstrap code in sw.js file

[hannadrehman]

Bug Report or Feature Request (mark with an x)

- [x] bug report -> please search issues before submitting
- [ ] feature request

Versions.

browser: chrome
browser version: 69.0.3497.100
operating system: mac os high sierra
webpack version: 4.17.2

Repro steps.

i am following the exact same steps mentioned in the readme to get it working.
it works but i can see a lot of webpack boilerplate code in my sw.js

// register.js

import runtime from 'serviceworker-webpack-plugin/lib/runtime';
if ('serviceWorker' in navigator) {
  runtime.register();
}

// plugin config

 new ServiceWorkerWebpackPlugin({
      entry: appPath.srcPath+'/service-worker.js',
      publicPath:'/',
      minimize: false,
    }),

// service worker file

importScripts('/sw-toolbox.js'); // eslint-disable-line

const spChache = {
  static: 'static-v1',
  dynamiv: 'dynamic-v1',
};

self.addEventListener('install', (event) => { // eslint-disable-line
  event.waitUntill(
    caches.open(spChache.static)
      .then(cache => cache.addAll(
        serviceWorkerOption.assets, //eslint-disable-line
      )),
  );
});
self.addEventListener('activate', (event) => { // eslint-disable-line
  console.log('WORKER: activated ');
});
toolbox.router.get('/api/*', toolbox.networkFirst, { // eslint-disable-line
  cache: {
    name: spChache.static,
    maxAgeSeconds: 60 * 60 * 1,
  },
});

Desired or expected functionality

it should only contain my written sw.js files. with serviceWorkerOption injected in it

but i am seeing a lot of webpack bootstrap code in my sw.js

// here is some part of my huge sw.js build by webpack

var serviceWorkerOption = {
  "assets": [
    "/assests/images/page-not-found.png",
    "/js/errorpage.js",
    "/js/home.js",
    "/js/main.js",
    "/js/memepage.js",
    "/js/profile.js",
    "/js/register-sw.js",
    "/js/todo.js",
    "/sw-toolbox.js",
    "/icons/icon-72x72.png",
    "/icons/icon-96x96.png",
    "/icons/icon-128x128.png",
    "/manifest.json",
    "/icons/icon-152x152.png",
    "/icons/icon-144x144.png",
    "/icons/icon-192x192.png",
    "/icons/icon-384x384.png",
    "/icons/icon-512x512.png"
  ]
};
        
        /******/ (function(modules) { // webpackBootstrap
/******/ 	var hotApplyOnUpdate = true;
/******/ 	// eslint-disable-next-line no-unused-vars
/******/ 	var hotCurrentHash = "746fbf40f90961685b01";
/******/ 	var hotRequestTimeout = 10000;
/******/ 	var hotCurrentModuleData = {};
/******/ 	var hotCurrentChildModule;
/******/ 	// eslint-disable-next-line no-unused-vars
/******/ 	var hotCurrentParents = [];
/******/ 	// eslint-disable-next-line no-unused-vars
/******/ 	var hotCurrentParentsTemp = [];
/******/
/******/ 	
this keeps on going for abt 3000+ lines.

Mention any other details that might be useful.