任务新增导出

zhongrj

2023-06-27 d74b495736f0c04522ec54274b70fed0ded2878d

 public/map/lib/zTree_v3/api/cn/setting.callback.beforeAsync.html

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   <h2><span>Function(treeId, treeNode)</span><span class="path">setting.callback.</span>beforeAsync</h2>
   <h3>概述<span class="h3_info">[ 依赖 <span class="highlight_green">jquery.ztree.core</span> 核心 js ]</span></h3>
   <div class="desc">
      <p></p>
      <div class="longdesc">
         <p>用于捕获异步加载之前的事件回调函数，zTree 根据返回值确定是否允许进行异步加载</p>
         <p>默认值：null</p>
      </div>
   </div>
   <h3>Function 参数说明</h3>
   <div class="desc">
   <h4><b>treeId</b><span>String</span></h4>
   <p>对应 zTree 的 <b class="highlight_red">treeId</b>，便于用户操控</p>
   <h4 class="topLine"><b>treeNode</b><span>JSON</span></h4>
   <p>进行异步加载的父节点 JSON 数据对象</p>
   <p class="highlight_red">针对根进行异步加载时，treeNode = null</p>
   <h4 class="topLine"><b>返回值</b><span>Boolean</span></h4>
   <p>返回值是 true / false</p>
   <p class="highlight_red">如果返回 false，zTree 将不进行异步加载，也无法触发 onAsyncSuccess / onAsyncError 事件回调函数</p>
   </div>
   <h3>setting & function 举例</h3>
   <h4>1. 禁止 id 为 1 的父节点进行异步加载操作</h4>
   <pre xmlns=""><code>function zTreeBeforeAsync(treeId, treeNode) {
    return (treeNode.id !== 1);
};
var setting = {
   callback: {
      beforeAsync: zTreeBeforeAsync
   }
};
......</code></pre>
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