# OnClientNodeChecked

The **OnClientNodeChecked** client-side event occurs after the end user selects a checkbox using mouse or keyboard. The node checked status returned by the node **get_checked()** function has now changed to reflect the new value. The action can longer be canceled.

The event handler receives parameters:

1. The **TreeView** instance that fired the event.

2. Event arguments with functions:

* **get_node()** retrieves a reference to the clicked on node.

* **get_domEvent()** retrieves a DOM event object of the node check.

The example below shows a message containing the text of a node and the checked state of its checkbox when checked/unchecked.

```ASPNET
<telerik:RadTreeView RenderMode="Lightweight" ID="RadTreeView1" runat="server" CheckBoxes="true" OnClientNodeChecked="ClientNodeChecked">
</telerik:RadTreeView>
```

```JavaScript
function ClientNodeChecked(sender, eventArgs) {
	var node = eventArgs.get_node();

	alert("You have checked node " +
			node.get_text() +
			". Current check state is: " +
			node.get_checked());
}
```

## See Also

* [OnClientNodeChecking](https://www.telerik.com/products/aspnet-ajax/documentation/controls/treeview/client-side-programming/events/onclientnodechecking)

* [RadTreeNode](https://www.telerik.com/products/aspnet-ajax/documentation/controls/treeview/client-side-programming/objects/radtreenode)