title: service worker fetch event on first load
body: <p>i am trying to learn some basics of progressive web apps and on one of the tutorial regarding i read that</p>
  
  <p>[After a service worker is installed and the user navigates to a different page or refreshes, the service worker will begin to receive fetch events]</p>
  
  <p>my question is can't we make the fetch event to take place on first load of index page itself.</p>