## Boolean setting.async.enable

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

Set zTree asynchronous loading mode on/off.

Default: false

### Boolean Format

true - turn on asynchronous loading mode

false - turn off asynchronous loading mode

If set it is true, you must set other attributes in setting.async

If you don't pass the 'treeNodes' parameter when you initialize zTree, the root nodes will be retrieved using ajax.

### Examples of setting

#### 1. Turn on asynchronous loading mode

    var setting = {
    	async: {
    		enable: true,
    		url: "http://host/getNode.php",
    		autoParam: ["id", "name"]
    	}
    };
    ......