SHELL

service worker

service worker is javascript file that run every time.It keeps running even you
close the browser.Due to this we can send push notification,offline mode.
//Register our service worker in index.html
<script>
  if('serviceWorker' in navigator){
  window.addEventListener('load', ()=> {
    //registering of serviceWorker.
  navigator.serviceWorker('./serviceworker.js')
  .then((reg)=> console.log("Success:", reg.scope));
  .catch((err)=> console.log("Failure: ", err));
  })}
 <script>
  
everything ok then we will see Sucess: localhost:3000 in console of browser

how to create a worker service

//Step 1: Publish the Worker service

cd "Path to the Worker service project"
dotnet restore
dotnet publish -o PathToThePublishFolder

//Step 2: Deploy and start with sc utility

sc.exe create DemoWorker binpath= PathToThePublishFolderYourWorkerClassName.exe
sc.exe start YourWorkerClassName

//Step 3: Stop and delete with sc utility

sc.exe stop YourWorkerClassName 
sc.exe delete YourWorkerClassName 

service worker

const filter = {
  url: [
    {
      urlMatches: 'https://www.google.com/',
    },
  ],
};

chrome.webNavigation.onCompleted.addListener(() => {
  console.info("The user has loaded my favorite website!");
}, filter);