How to make the site work offline?

Question

Google

Today there were some interruptions with the Internet. Opened Chrome, and, of course, not a single page was loaded. Instead of them, a standard error was displayed: it is impossible to find a server (or something like that), but on the Google page there was such an inscription: my.jetscreenshot.com/6628/20111110-zliq-31kb
How to repeat this behavior of the page in the absence of the Internet?

Answer 1

That's it . Examples at the end.
If you do not rush, then soon (a couple of weeks) I will finish a detailed article on this issue.

Answer 2

Maybe it's Google Gears

Answer 3

Check out the html5 datastore
An example can be found here
www.html5rocks.com/en/tutorials/indexeddb/todo/