HTML and CSS Reference
In-Depth Information
Offl ine
Remy Sharp
HOW MANY TIMES have I been working on a train, des-
perately trying to get a 3G connection with my cheap don-
gle, and failed to navigate the web application I was using
because I've just traveled through a tunnel (and thus lost
all connectivity)? A lot, that's how many. Computing either
with no Internet or with a particularly choppy connection
usually means mobile computing, but it can also mean you
just want to work offline. Equally, the user may not have
chosen to go offline. As we become more mobile with our
computers, being able to continue to use a website outside
of reception becomes more and more important.
We're used to creating web apps that rely absolutely
on the Web. Our websites run in browsers, which are
designed to be a viewport onto the Web. The offline web
applications part of the HTML5 spec takes the “web” out
of “web app.” The browser will manage a local cache so
our application will work without an Internet connection.
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