Re: [css4-images] specifying intrinsic size for images that haven't loaded yet

On Sunday 2012-07-29 15:08 +1000, Alan Gresley wrote:
> On 29/07/2012 2:22 PM, L. David Baron wrote:
> > describes a use
> >case that we should try to address; specifying an *intrinsic size*
> >for images that aren't loaded yet so that pages don't bounce around
> >when images load.  This is doable today if you want the images to be
> >sized to their intrinsic size, but it's not doable today if you want
> >to scale the images but preserve the intrinsic ratio (for example,
> >by making them the width of their container).
> I believe this is what the value 'fill' does with the property
> 'object-fit' by this algorithm (see point two for 'specified size')
> [2].

This is not possible, since 'fill' is the initial value of
'object-fit', so it must be compatible with today's behavior.  And
today's behavior (per CSS 2.1) is that given something like:

  <img src="..." width="1500" height="1000" style="width: 100%">

in an 800px wide container, the image will end up being 800px wide
and 1000px tall, rather than 600px tall.

If the height="1000" is omitted, then there's no knowledge of the
intrinsic dimensions prior to the image starting (at least) to load.


𝄞   L. David Baron                  𝄂
𝄢   Mozilla                    𝄂

Received on Sunday, 29 July 2012 05:21:44 UTC