openo-portal/portal-common/src/main/webapp/common/thirdparty/zTree/api/cn/setting.callback.beforeAsync.html

   1 <div class="apiDetail">
   2 <div>
   3         <h2><span>Function(treeId, treeNode)</span><span class="path">setting.callback.</span>beforeAsync</h2>
   4         <h3>概述<span class="h3_info">[ 依赖 <span class="highlight_green">jquery.ztree.core</span> 核心 js ]</span></h3>
   5         <div class="desc">
   6                 <p></p>
   7                 <div class="longdesc">
   8                         <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>
   9                         <p>默认值：null</p>
  10                 </div>
  11         </div>
  12         <h3>Function 参数说明</h3>
  13         <div class="desc">
  14         <h4><b>treeId</b><span>String</span></h4>
  15         <p>对应 zTree 的 <b class="highlight_red">treeId</b>，便于用户操控</p>
  16         <h4 class="topLine"><b>treeNode</b><span>JSON</span></h4>
  17         <p>进行异步加载的父节点 JSON 数据对象</p>
  18         <p class="highlight_red">针对根进行异步加载时，treeNode = null</p>
  19         <h4 class="topLine"><b>返回值</b><span>Boolean</span></h4>
  20         <p>返回值是 true / false</p>
  21         <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>
  22         </div>
  23         <h3>setting & function 举例</h3>
  24         <h4>1. 禁止 id 为 1 的父节点进行异步加载操作</h4>
  25         <pre xmlns=""><code>function zTreeBeforeAsync(treeId, treeNode) {
  26     return (treeNode.id !== 1);
  27 };
  28 var setting = {
  29         callback: {
  30                 beforeAsync: zTreeBeforeAsync
  31         }
  32 };
  33 ......</code></pre>
  34 </div>
  35 </div>