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

   1 <div class="apiDetail">\r
   2 <div>\r
   3         <h2><span>Function(treeId, treeNode)</span><span class="path">setting.callback.</span>beforeAsync</h2>\r
   4         <h3>Overview<span class="h3_info">[ depends on <span class="highlight_green">jquery.ztree.core</span> js ]</span></h3>\r
   5         <div class="desc">\r
   6                 <p></p>\r
   7                 <div class="longdesc">\r
   8                         <p>Used to capture the event before zTree execute ajax, zTree based on return value to determine whether to execute ajax.</p>\r
   9                         <p>Default: null</p>\r
  10                 </div>\r
  11         </div>\r
  12         <h3>Function Parameter Descriptions</h3>\r
  13         <div class="desc">\r
  14         <h4><b>treeId</b><span>String</span></h4>\r
  15         <p>zTree unique identifier: <b class="highlight_red">treeId</b>, easy for users to control.</p>\r
  16         <h4 class="topLine"><b>treeNode</b><span>JSON</span></h4>\r
  17         <p>JSON data object of the parent node</p>\r
  18         <p class="highlight_red">When asynchronously loading the root, the treeNode = null</p>\r
  19         <h4 class="topLine"><b>Return </b><span>Boolean</span></h4>\r
  20         <p>return true or false</p>\r
  21         <p class="highlight_red">If return false, zTree will not execute ajax, and will not trigger the 'onAsyncSuccess / onAsyncError' callback.</p>\r
  22         </div>\r
  23         <h3>Examples of setting & function</h3>\r
  24         <h4>1. If the parent node's attribute 'id' is 1, zTree will not execute ajax.</h4>\r
  25         <pre xmlns=""><code>function zTreeBeforeAsync(treeId, treeNode) {\r
  26     return (treeNode.id !== 1);\r
  27 };\r
  28 var setting = {\r
  29         callback: {\r
  30                 beforeAsync: zTreeBeforeAsync\r
  31         }\r
  32 };\r
  33 ......</code></pre>\r
  34 </div>\r
  35 </div>