HTML and CSS Reference
In-Depth Information
FALLBACK:
headshots/ dust-puppy-4.gif
NETWORK:
*
In addition to multiple
FALLBACK
sections and a
NETWORK
section, this list-
ing has two
CACHE
sections. There are two because
CACHE
is the default
assumption at the start of the manifest file. It's possible to switch
between sections at any point by adding one of the three keywords on a
line by itself. This means the manifest file can be arranged to suit the
application rather than forcing everything to fit into three sections.
The other interesting feature of this manifest file is that it demonstrates
the pattern-matching and wildcard ability of the
FALLBACK
and
NETWORK
sections. The
NETWORK
section has a star in it, which means “match any-
thing”— anything that isn't listed is requested from the network. This
is the default behavior, so it's not necessary to include it here, but if you
were developing real offline applications you'd include
URL
patterns
for your
API
in this section.
The second
FALLBACK
section includes a directory. It's saying, “For any-
thing in the folder headshots, fall back to dust-puppy-4.gif when offline.”
This screenshot shows ch06/offline-
example/offline-4.html when online.
Here's the markup for this example:
<img src="example-4.png"
alt="An example image">
<p>Example starring:</p>
<img src="headshots/pitr.gif"
alt="Pitr">
<img src="headshots/mike.gif"
alt="Mike">
<img src="headshots/stef.gif"
alt="Stef">
