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Register a Service Worker in Angular

How to Register a Service Worker?
To install a service worker you need to kick-start the process by registering it on your page. This tells the browser where your service worker JavaScript file lives.

You can call below register () every time a page loads without concern; the browser will figure out if the service worker is already registered or not and handle it accordingly.

if ('serviceWorker' in navigator) {
  window.addEventListener('load'function() {
    navigator.serviceWorker.register('/sw.js').then(function(registration) {
      // If Registration was successful
      console.log('Success Registration - 'registration.scope);
    function(err) {
      // If Registration was failed!
      console.log('Failed Registration - 'err);

This code checks to see if the service worker API is available, and if it is, the service worker at /sw.js is registered once the page is loaded.

Got a minute? Check out this, Angular 6 Questions | A Complete Guide Book
By Anil Singh | Rating of this article (*****)

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