Service worker for offline caching.

Want javascript developer to develop service worker for offline pages caching, below is the detailed brief for same. 1. We have website which required login (user to be authenticated) to view other pages. 2. Want service worker to cache pages offline and store them locally. 3. Whenever internet connection is down, the offline pages to be available. 4. if user hits the URL, and has no internet connection, system should redirect user to offline home page that he had browsed earlier, without asking him to login. Do let me know incase more clarity required.