Аннимированные кнопки иконки

<link rel="stylesheet" type="text/css" href="{{ tpl_url }}/fonts/font-awesome-4.3.0/css/font-awesome.min.css" />
<link rel="stylesheet" type="text/css" href="{{ tpl_url }}/css/component.css" />
<script src="{{ tpl_url }}/js/classie.js"></script>
		<script>
			(function() {
				// http://stackoverflow.com/a/11381730/989439
				function mobilecheck() {
					var check = false;
					(function(a){if(/(android|ipad|playbook|silk|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|
blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|
palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|
windows (ce|phone)|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|
ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|
cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|
ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-
|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)
|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|
mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|
61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|
your|zeto|zte\-/i.test(a.substr(0,4)))check = true})(navigator.userAgent||navigator.vendor||window.opera);
					return check;
				}
				var support = { animations : Modernizr.cssanimations },
					animEndEventNames = { 'WebkitAnimation' : 'webkitAnimationEnd', 'OAnimation' : 'oAnimationEnd', 'msAnimation' : 'MSAnimationEnd', 'animation' : 'animationend' },
					animEndEventName = animEndEventNames[ Modernizr.prefixed( 'animation' ) ],
					onEndAnimation = function( el, callback ) {
						var onEndCallbackFn = function( ev ) {
							if( support.animations ) {
								if( ev.target != this ) return;
								this.removeEventListener( animEndEventName, onEndCallbackFn );
							}
							if( callback && typeof callback === 'function' ) { callback.call(); }
						};
						if( support.animations ) {
							el.addEventListener( animEndEventName, onEndCallbackFn );
						}
						else {
							onEndCallbackFn();
						}
					},
					eventtype = mobilecheck() ? 'touchstart' : 'click';

				[].slice.call( document.querySelectorAll( '.cbutton' ) ).forEach( function( el ) {
					el.addEventListener( eventtype, function( ev ) {
						classie.add( el, 'cbutton--click' );
						onEndAnimation( classie.has( el, 'cbutton--complex' ) ? el.querySelector( '.cbutton__helper' ) : el, function() {
							classie.remove( el, 'cbutton--click' );
						} );
					} );
				} );

			})();
		</script>

<button class="cbutton cbutton--effect-boris">
						<i class="cbutton__icon fa fa-fw fa-step-backward"></i>
						<span class="cbutton__text">Backward</span>
					</button>