A practical guide to Progressive Web Apps for organisations who don’t know anything about Progressive Web Apps : Records Sound the Same
Sally gives a really good introduction to using service workers as a progressive enhancement.
Link archive: January 27th, 2017
✨Implementing “Save For Offline” with Service Workers | Una Kravets Online✨
A great little script from Una that’s perfect for blogs and news sites—allowing users to explicitly save a page for offline reading.