Uncaught TypeError: Cannot read property 'core' of undefined ？？

Question

用jstree请求ajax生成树结构，一直报一个错误。

这个错误要怎么解决呀？

$('.btn1').click(function() {
        $('#jstree_demo_div').jstree({
            "plugins" : [ "checkbox","contextmenu","dnd","search","state","types","wholerow" ],
            "checkbox" : {
                "keep_selected_style" : false,
            },
            'core' : {
                  'data' : {
                    'url' : '<%=basePath%>admin/resources/resourceTree.jhtml',
                    'data' : function (node) {
                      return { 'id' : node.id };
                    }
                  }
            }
            
        }) 

Answer 1

请问解决了吗