#Penner Easing Animation SASS/Compass Extension.

###Penner-style easing using CSS3 Animation Keyframes

This extension also requires Eric Meyer's Compass Animation Extension

###Nine mixins to generate cool easing effects using CSS animations:

• @mixin ease-in-back-keyframes($values)
• @mixin ease-out-back-keyframes($values)
• @mixin ease-in-out-back-keyframes($values)
• @mixin ease-in-bounce-keyframes($values)
• @mixin ease-out-bounce-keyframes($values)
• @mixin ease-in-out-bounce-keyframes($values)
• @mixin ease-in-elastic-keyframes($values)
• @mixin ease-out-elastic-keyframes($values)
• @mixin ease-in-out-elastic-keyframes($values)

##Usage See Demo

@import "animation"; // https://github.com/ericam/compass-animation
@import "compass-penner-easing";

@include keyframes(some-animation) {
   // pass in a list of start and end values to ease between
   // eg.
   // 0=>50
   // 300 =>100
   @include ease-in-out-elastic-keyframes( (0 50, 300 100) ){
   	// reference the global $_EASE variable on whatever properies you want animated
   	// (nth item value corresponds to the start and end values you pass in)
   	border-width:#{nth($_EASE,1)}px;
   	width:#{nth($_EASE,2)}px;
   }
}

#myDiv {
   // reference animation use non-shorthand properties!
   @include animation-name(some-animation);
   @include animation-duration(1s);
}

More Demos