olemus
äpi tööilmega veebisait
= a website that looks and behaves as if it is a mobile app

ülevaateid
https://en.wikipedia.org/wiki/Progressive_web_application

https://medium.com/@the_manifest/11-examples-of-progressive-web-apps-944f6db25a5a

https://medium.com/@amberleyjohanna/seriously-though-what-is-a-progressive-web-app-56130600a093

https://www.smashingmagazine.com/2016/08/a-beginners-guide-to-progressive-web-apps/