在 jsTree 我得到 data.rslt 为未定义

Question

使用 jsTree，我在尝试读取数据对象时得到 data.rslt undefined。

这是我的 jQuery，创建一棵树，加载 JSON，它应该在加载时将 data.rslt 对象输出到控制台。

$(function () {
    $("#demo1").jstree({ 
        "plugins" : [ "themes","json_data","ui", "crrm" ],
        "json_data" : {
            "ajax" : {
                "url" : "categorytreejson.asp"
            }
        },
        "ui" : {
            "initially_select" : [ "root" ]
        }
    });

    $("#demo1").bind("loaded.jstree", function (e, data) {
        console.log(data.rslt)
    });
});

这是 JSON 数据

{"data": "root", "attr": {"id": "root"}, "children": [{"data": "Photography", "attr": {"id": "Photography"}, "children": [{"data": "Lenses", "attr": {"id": "Lenses"}, "children": [{"data": "Telephoto", "attr": {"id": "Telephoto"}},{"data": "Macro", "attr": {"id": "Macro"}},{"data": "Other", "attr": {"id": "Other"}}]}]}]}

生成的 HTML

<li class="jstree-last jstree-open" id="root"><ins class="jstree-icon">&nbsp;</ins><a class="" href="#"><ins class="jstree-icon">&nbsp;</ins>root</a><ul style=""><li class="jstree-closed" id="Photography"><ins class="jstree-icon">&nbsp;</ins><a class="" href="#"><ins class="jstree-icon">&nbsp;</ins>Photography</a><ul><li class="jstree-last jstree-closed" id="Lenses"><ins class="jstree-icon">&nbsp;</ins><a href="#"><ins class="jstree-icon">&nbsp;</ins>Lenses</a><ul><li class="jstree-leaf" id="Telephoto"><ins class="jstree-icon">&nbsp;</ins><a href="#"><ins class="jstree-icon">&nbsp;</ins>Telephoto</a></li><li class="jstree-leaf" id="Macro"><ins class="jstree-icon">&nbsp;</ins><a href="#"><ins class="jstree-icon">&nbsp;</ins>Macro</a></li><li class="jstree-last jstree-leaf" id="Other"><ins class="jstree-icon">&nbsp;</ins><a href="#"><ins class="jstree-icon">&nbsp;</ins>Other</a></li></ul></li></ul></li></li></ul></li></ul></li>

还有 Firebug 中的数据对象。

args: []
inst: Object { data={...}, get_settings=function(), _get_settings=function(), more...}
rlbk: false
rslt: undefined

Answer 1

某些事件不会填充 data.rslt 对象。
截至jsTree core documentation：

数据结构：

{ 
   "inst" : /* the actual tree instance */, 
   "args" : /* arguments passed to the function */, 
   "rslt" : /* any data the function passed to the event */, 
   "rlbk" : /* an optional rollback object - it is not always present */
}

特别是，loaded.jstree 事件将有一个空的 data.rslt，因为没有向函数传递其他数据。

create.jstree 或 rename.jstree 等其他事件将填充 data.rslt。

我希望你现在更清楚了:-)