code: function canOverflow(el, axis) {
      var overflowValue = w.getComputedStyle(el, null)['overflow' + axis];
  
      return overflowValue === 'auto' || overflowValue === 'scroll';
    }
docs: indicates if an element has a scrollable overflow property in the axis
  @method canOverflow
  @param {Node} el
  @param {String} axis
  @returns {Boolean}