Service Workers

Services Workers и CacheStorage https://habrahabr.ru/post/279291/

Примеры Service Workers https://github.com/w3c-webmob/ServiceWorkersDemos

https://serviceworke.rs/

https://github.com/w3c-webmob/ServiceWorkersDemos

Проверить какие service workers запущены

chrome://serviceworker-internals/

Смотрим рабочий пример

https://jakearchibald.com/2014/using-serviceworker-today/

http://blog.lamplightdev.com/2015/01/06/A-Simple-ServiceWorker-App/

https://davidwalsh.name/offline-recipes-service-workers