docs: function(prop) {
  			var vendors = this._vendors,
  				fixt = prop;
  			var element = document.documentElement;
  			prop = String(prop);
  			if (prop.startsWith("-beta-")) {
  				vendors.every(function(vendor) {
  					var test = this._camelcase(prop.replace("-beta-", vendor));
  					if (element.style[test] !== undefined) {
  						fixt = test;
  						return false;
  					}
  					return true;
  				}, this);
  			} else {
  				fixt = this._camelcase(fixt);
  			}
  			return fixt;
  		}