code: function ( els, attrs, childAttr ) {
              var i, j, elNum = els.length, children, attrNum = attrs.length;
      
              for ( i = 0; i < elNum; ++i ) {
                  var el = els[i];
      
                  for ( j = 0; j < attrNum; ++j ) {
                      var prop =  attrs[j];
      
                      if ( $B( el ).attr( prop ) ) {
                          $B( el ).removeAttr( prop );
                      }
                  }
      
                  if ( childAttr ) {
                      children = el.children;
                      if ( children.length > 0 ) {
                          $B.utils.removeCustomAttribute( children, attrs, true );
                      }
                  }
              }
          }
docs: target과 자식들의 Custom Attribute 검색후 삭제
  @param	{Array}		els			대상 Element 배열
  @param	{Array}		attrs		Attribute Name 배열
  @param	{Boolean}	childAttr	자식들도 검색할건지 설정, 기본 false