I want bring an offline experience to the Outlook Web add-in that I am trying to build targeting the Outlook windows client. My idea is to use modern offline methods like service worker. This applies for Word Add-in as well. It would be nice to have something working in offline mode.
I found that web client that Outlook uses to render the add-in , does not support Service Worker. I am not in favor of using app cache to get offline experience , since it is not a web standard anymore.
Is the service worker support for Office Web add-in being planned by the Office add-in team? Or is there any other approach that is being suggested?
Offline running is not supported for Office/Outlook Add-ins. But it's a good idea. Please vote up this request at Office Developer Voice.