Ext.define('Ext.scroll.scroller.CssTransform', { extend: 'Ext.scroll.scroller.Abstract', doScrollTo: function(x, y) { var dom = this.getElement().dom, position = this.position; if (x === null) { x = position.x; } x = -x; if (y === null) { y = position.y; } y = -y; dom.style.webkitTransform = 'translate3d(' + x + 'px, ' + y + 'px, 0px)'; } });