Offline news - Service Worker 
https://offline-news-service-worker.herokuapp.com
Warnings:-
- You must enable Service Worker first - instructions for Chrome
- I've only tested this in Google Chrome Canary
Prerequisites for runing locally
UNIX-like computer running node (would happily accept pull requests to fix it for Windows but I don't have the means to test that here).
Install a copy of offline-news-api and run locally (follow instructions on that repository).
Install and run
git clone git@github.com:matthew-andrews/offline-news-service-worker.git
npm install
node index.js