js links

One-page guide to ES2015+: usage, examples, and more. A quick overview of new JavaScript features in ES2015, ES2016, ES2017, ES2018 and beyond.
Rich offline experiences, periodic background syncs, push notifications—functionality that would normally require a native application—are coming to the web. Service workers provide the technical foundation that all these features rely on.
The Service Worker Cookbook is a collection of working, practical examples of using service workers in modern web sites.
One overriding problem that web users have suffered with for years is loss of connectivity. The best web app in the world will provide a terrible user experience if you can’t download it. There have been various attempts to create technologies to solve this problem, as our Offline page shows, and some of the issues have been solved.