Following the current Editor's Draft of the CSS3 Transitions Module, the valid Point coordinates of a cubic-bezier timing-function must be between zero and one[1]. I'd like to propose lifting this limitation. The primary use-case for this would be transitions which slightly, in case of lengths, overrun the final value. This creates "elastic" effects, some of which are visible on this page: http://jqueryui.com/demos/effect/easing.html One problem I can see are values which have fixed bounds, such as colors. Darker than #000 can't be displayed, neither can lighter than #FFF. In these cases it seems best to clamp the value to the value-type's upper or lower bound internally. Kind regards, Peter Beverloo http://peter.sh/ [1] http://dev.w3.org/csswg/css3-transitions/#transition-timing-function_tag
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