code: function ( type, event ) {
              var touches = [];
      
              if ( MS_POINTER ) {
                  for ( var n in this._touches ) {
                      touches.push( this._touches[n] );
                  }
              } else {
                  touches = event.touches;
              }
      
              return touches;
          }
docs: 크로스브라우징 TouchEvent Touches 반환