easing ain't easy - or is it?
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linear
-webkit-transition: -webkit-transform 1s ease 0s;
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ease
-webkit-transition: -webkit-transform 1s linear 0s;
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ease-in
-webkit-transition: -webkit-transform 1s ease-in 0s;
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ease-out
-webkit-transition: -webkit-transform 1s ease-out 0s;
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ease-in-out
-webkit-transition: -webkit-transform 1s ease-in-out 0s;
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cubic-bezier(x1, y1, x2, y2)
-webkit-transition: -webkit-transform 1s cubic-bezier(0.25,0.5,0.8,0.2) 0s;