Sample project for understanding about web notif 69C4 ications.
https://developer.mozilla.org/ja/docs/WebAPI/Using_Web_Notifications
https://developers.google.com/web/updates/2015/03/push-notifications-on-the-open-web
https://ide.c9.io/sinpaout/push-me
First you have to put GCM server key into gcm-key file of root directory.
And then run npm script:
npm start