Track progress of service workers

[willscott]

Service workers enable something much closer to drop-in library functionality, but are supported only in new browsers. Checking propagation of that code both in total browser deployment, and with country breakdown would be important to understand when it is sufficiently available to be worth building.

[willscott]

Up to 17% globally, but <2% penetration in china.
http://caniuse.com/#feat=serviceworkers

[jab]

https://twitter.com/webmaxru/status/893027996659060738

This day goes to #PWA history! Initial steps of #ServiceWorker in #Safari: https://bugs.webkit.org/attachment.cgi?id=317095&action=diff
Kudos to @bradeeoh & all @WebKit team!

ought to spell significantly higher adoption rates once it lands ✨

[jab]

Seen https://workboxjs.org? Seems like activist.js could be quite complementary.

[jab]

https://jakearchibald.github.io/isserviceworkerready/