Primary eng (and PM) emails
Summary
Remove support for these prefixed CSS media features:
-webkit-transform-2d (PrefixedTransform2dMediaFeature -webkit-animation (PrefixedAnimationMediaFeature)
Motivation
They are prefixed and extremely rare used according to UseCounter data
Compatibility Risk
Media queries using these features stop matching, and so some CSS will stop being applied.
Alternative implementation suggestion for web developers
None of these have been standardized, so just unprefixed will not work. The first two can be replaced with @supports:
@media(-webkit-transform-2d) => @supports(-webkit-transform: none)
@media(-webkit-animation) => @supports(-webkit-animation: none)
-webkit-view-mode doesn't have a replacement, because it didn't do anything useful, as Peter Beverloo mentions in this blog:
http://peter.sh/2010/11/multiple-profiles-the-matchmedia-interface-and-locally-modified-files/
Usage information from UseCounter
http://www.chromestatus.com/metrics/feature/timeline/popularity/236
http://www.chromestatus.com/metrics/feature/timeline/popularity/238
http://www.chromestatus.com/metrics/feature/timeline/popularity/239
Entry on chromestatus.com and/or MDN
None
Requesting approval to remove too?
Yes, usage is so low that a deprecation period seems unlikely to do any good.
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