On Mon, 13 Feb 2012 12:11:21 +0100, Charles McCathieNevile
<cha...@opera.com> wrote:
On Mon, 13 Feb 2012 12:00:52 +0100, Kang-Hao (Kenny) Lu
<kennyl...@csail.mit.edu> wrote:
(12/02/13 18:33), Bjartur Thorlacius wrote:
On 2/13/12, Gray Zhang <otakus...@gmail.com> wrote:
2. On an album page where hundreds of pictures are expected to be
shown,
it is often required that pictures currently in a user's screen
should
appear as fast as possible. Loading of a picture outside the
screen can
be
deferred to the time that the picture enters or is about to enter
the
screen, for the purpose of optimization user experience.
This seems like something interactive user agents should implement.
But it is currently not reliable to the extent that Web authors can rely
on it. The current spec for <img>[1] says
# User agents may obtain images immediately or on demand.
Is there actually an existing user agent that obtain images on demand?
Opera.
Depends which product. Even Opera on desktop would previously try to be
clever about what to load and not, however this caused much headache as
authors expected all sorts of events and intrinsic dimensions just as if
the resources were loaded and visible. For compat reasons Opera now is in
line with other user agents. For compatibility it is better to have such
mechanisms specced.
--
Ola P. Kleiven, Core Compatibility, Opera Software
