LeaVerou/css3test — pull request #32 by syoichi (2012-10-09 07:07:25+00:00)
Title: Remove transition-duration and animation-duration's "-1s" tests

transition-duration and animation-duration's negative value tests should be removed.

Latest spec says...

>A negative value for transition-duration renders the declaration invalid.

http://dev.w3.org/csswg/css3-transitions/#transition-duration-property

>A negative ‘animation-duration’ value renders the declaration invalid.

http://dev.w3.org/csswg/css3-animations/#animation-duration-property

related: [\[CSSWG\] Minutes and Resolutions Telecon 2012-07-11 from fantasai on 2012-07-11 (www-style@w3.org from July 2012)](http://lists.w3.org/Archives/Public/www-style/2012Jul/0265.html)

And Mozilla Firefox 16+ follow the above spec.
[773102 – transition-duration and animation-duration should reject negative values at parse time](https://bugzilla.mozilla.org/show_bug.cgi?id=773102)

>The animation-duration and transition-duration CSS properties now reject negative values (and do not handle them as 0s anymore) (bug 773102)

[Firefox 16 for developers | MDN](https://developer.mozilla.org/en-US/docs/Firefox_16_for_developers)