How Do I Refresh a Dijit Tree?

Dijit is the name of a component that is part of the Dojo Toolkit, a collection of JavaScript tools for Web pages. By using Dijit, Web developers can integrate what is known as a Dijit tree, a hierarchical structure that organizes data into various categories. If you want the Web page to automatically refresh a Dijit tree, you can define a new function that will perform that action and call the function when needed.

Instructions

1. Launch Notepad, the Windows text editor, and open the file that contains the source code of your Dojo script.

2. Type or cut-and-paste the following code near the top of the file:
   <script language="JavaScript" type="text/javascript">
   dojo.extend(dijit.Tree, {
   refresh: function() {
   this._itemNodesMap={};
   this.model.root = null {};
   if(this.rootNode) { this.rootNode.destroyRecursive();}
   this._load;}
   });
   </script>
   The code creates a new function that refreshes the Dijit tree when called.

3. Call the function at any point in your script by inserting the following function call:
   dijit.byID('treeid').refresh();
   Replace "treeid" by the actual identification code assigned to the tree.

4. Click on "File" and select "Save."