developer.chrome.com
https://developer.chrome.com/extensions/notifications
notification | MDN
https://developer.mozilla.org/zh-CN/docs/Web/API/notification
Chrome Notification - 凯凯刘
http://liujinkai.com/2015/05/25/chrome-notification/
simple-push-demo.appspot.com
https://simple-push-demo.appspot.com/
HTML5桌面通知：notification api - 涵野 - 博客园
http://www.cnblogs.com/lxshanye/p/3560188.html
Using the Notifications API - HTML5 Rocks
https://www.html5rocks.com/en/tutorials/notifications/quick/
Chrome 桌面通知Notification
https://www.bbsmax.com/A/MyJxZppdnL/
Chrome的桌面通知 - kaosini的专栏 - CSDN博客
https://blog.csdn.net/kaosini/article/details/8024988