A friend of mine and I just had a pretty heated discussion about
whether it’s OK for browser vendors to implement technologies that
are not yet finalized standards. I criticized Opera for pushing for
standards compliance while following IE in some places where it
diverges from standards; he criticized Firefox and Chrome for
implementing technologies that are not yet standard like the
<canvas> tag and
border-radius:. He further claimed that Opera
was not guilty of half-ass implementation of not-yet-ready
Today, he emailed me the following:
This is where opera snapshots and changelogs are announced.
But before I continue, I just have a quick note regarding the addition of object-fit and object-position from the CSS3 Paged Media Module properties in the previous 10.70 snapshot: These are currently only supported with the -o- prefix, but we recommend that you also add them without the prefix as well if you choose to use them on a page.
Those fuckers, they made us both wrong (wronger in my case)!
I Googled, and it looks like the aforementioned attributes are for
breaking media over pages, like in printing, iPad viewing, or
arc90′s Readability project which
made it into desktop Safari. In Opera, you have to invoke these
new rules with
But it’s OK! The
-vendor-attribute: value; syntax is how
browser vendors posit implementations of proposed or incomplete
standards. See also gradient fills:
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#cccccc', endColorstr='#000000'); /* for IE */
background: -webkit-gradient(linear, left top, left bottom, from(#ccc), to(#000)); /* for webkit browsers */
background: -moz-linear-gradient(top, #ccc, #000); /* for firefox 3.6+ */
These things are standards, but the implementation has been left
up to the browser vendors to find and agree on the best syntax.
When the best method is found, they’ll collapse their
implementations into a single syntax, like
: rgba(). So in CSS3, you should be able to
make rounded-corner boxes with gradient fills that use alpha
I know that this stuff sounds gross and unappealing to some of us (like my friend), but I also know that most of us are grateful for these upcoming changes. :)