## BooleantreeNode.zAsync

### Overview[ depends on jquery.ztree.core js ]

Judge whether the parent node's child nodes will be loaded asynchronously when the parent node is expanded.

Do not initialize or modify it, it is created by the zTree.

Default：false (the parent node which have no child nodes); true (the parent node which have child nodes or the leaf node)

### Boolean Format

true means: the node's child nodes will not be loaded asynchronously when the parent node is expanded.

false means: the node's child nodes will be loaded asynchronously when the parent node is expanded.

This attribute will not effect to 'reAsyncChildNodes()' method

### Examples of treeNode

#### 1. Judge whether the first selected node's child nodes has been loaded asynchronously

    var treeObj = $.fn.zTree.getZTreeObj("tree");
    var sNodes = treeObj.getSelectedNodes();
    if (sNodes.length > 0) {
    	var zAsync = sNodes[0].zAsync;
    }