[html5] Offline apps

[Jacob Kristensen]

You should be able to simply update the manifest file dynamically on the 
server side, whenever your page or application is updated.

The smallest change should trigger a re-download, which means that even 
changing a comment in the manifest file would make UAs fetch the resources 
again.
It would be nice if there was a way to trigger such re-downloads 
individually, as all files might not be updated. I'm sure some sites or 
applications would find this useful.

It has been suggested to simply include a version number, or whatever, in a 
comment, and increment that when your page/app gets updated, but basically 
anything would work.

You may however also want to consider how many requests this actually saves 
you, compared to using etag and cache headers.

Jacob Kristensen
http://blueboden.com/