code: function() {
  			if (iBaseFontSize == null) {
  				var oDocumentRootElement = document.documentElement;
  				if (oDocumentRootElement) {
  					iBaseFontSize = parseInt(window.getComputedStyle(oDocumentRootElement).fontSize);
  				}
  			}
  
  			return iBaseFontSize == null ? 16 : iBaseFontSize;
  		}
docs: Gets the base font size of the document in pixels. If this method is called while the base size cannot be retrieved from the document, a
  default font size of 16 (pixels) is returned.
  
  @returns {int} The base font size in pixels.