106245 2013-01-07 13:13:16 -0800 A negative value for transition-duration should be treated as 0s. 2013-01-07 13:30:57 -0800 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) All All RESOLVED INVALID WebExposed P2 Normal --- 93136 1 menard menard dino peter simon.fraser tabatkins oldest_to_newest 801588 0 menard 2013-01-07 13:13:16 -0800 http://www.w3.org/TR/css3-transitions/#transition-duration-property specify that a negative value for transition-duration should be treated as 0s. It's not the case in WebKit today. I wonder if the spec is accurate, I remember it was discussed not so long ago in the CSS WG. My quick test in js (not actually looking the rendering) shows that Opera returns negative values when querying the transition-duration on the computed style and Firefox seems to just drop the negative sign, so -10s would be a 10s. 801601 1 menard 2013-01-07 13:30:57 -0800 I really should read the editor's draft http://dev.w3.org/csswg/css3-transitions/#transition-duration-property has been updated to "A negative value for transition-duration renders the declaration invalid." so WebKit behaves correctly.