On 6/25/18 11:01 PM, L. David Baron wrote:
How does the particular set of features that you're planning to ship
vs. not ship align with what other browsers have shipped (or are
close shipping)?
I'm not aware of any other browser implementing or shipping any of the
changes from MQ3 to MQ4, so we'd be the first to support these.
This subset is somewhat straight-forward, and spec author feedback is
clear I think:
https://lists.w3.org/Archives/Public/www-style/2017Feb/0036.html
I'd be fine not shipping it for now and keeping it behind a pref, but I
don't think it's worth it given how unlikely it is to change. Let me
know if you think otherwise though.
-- Emilio
-David
On Monday 2018-06-25 21:13 +0200, Emilio Cobos Álvarez wrote:
In bug 1422225 I plan to land most of the syntax improvements to
mediaqueries-4.
Some of the features included are:
* Allowing operators such as >, <, >=, or <= in media feature expressions,
which allows to properly exclude media queries in a way min-* and max-*
cannot, like:
@media (width >= 900px) { some rules }
@media (width < 900px) { some other rules }
Guarantees that either `some rules` or `some other rules` apply, which is
something that is not guaranteed by the existing syntax (see [1] or [2], for
example).
* Or expressions, and arbitrary expression nesting like:
@media ((width >= 500px) and (width <= 900px)) or (not (orientation:
portrait))
Things that are _not_ included are:
* The range syntax, or allowing values before the feature name, that is:
@media (500px > width) or (500px < width < 900px)
This is nice, but not so trivial to implement, and you can either reverse
the expression (`(width <= 500px)` in the first case), or use the expanded
version of it using `and` expressions for the second.
* The changes to serialization and parsing that allows basically anything
in a feature expression to be valid, that is, treating as a valid media
query something like:
@media (orientation: portrait) or (garbage)
Bug 1469174 and bug 1469173 are tracking those two, respectively.
Let me know if you find unknown issues, or think we shouldn't ship this.
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