# Using Custom Attributes Client-side

Access custom attributes on the client side by using first the **get_attributes()** method. Then extract the specific attribute with the **getAttribute()** method, passing the attribute name.

> caution All custom attributes are persisted on the client-side in the node object attributes collection and they are not rendered to the HTML element.
> The custom attribute's name should not be an **HTML reserved word**. Please see the [Troubleshooting Custom Attributes](https://www.telerik.com/products/aspnet-ajax/documentation/controls/treeview/troubleshooting/custom-attributes) article for more information.

The example below demonstrates accessing the node attributes within the **OnClientNodeClicked** event handler.

> caption

![RadTreeView OnClientNodeClicked Event](https://www.telerik.com/products/aspnet-ajax/documentation/assets/fcceaabc695b8e98f3c635d7ae0aa82b/treeview_customattributesclientside.png)

```ASPNET
<telerik:RadTreeView RenderMode="Lightweight" ID="RadTreeView1" runat="server" OnClientNodeClicked="onNodeClicked">
    <Nodes>
        <telerik:RadTreeNode runat="server" Text="Red Oak" ScientificName="Quercus rubra">
        </telerik:RadTreeNode>
        <telerik:RadTreeNode runat="server" Text="Eastern Red Cedar" ScientificName="Juniperus virginiana">
        </telerik:RadTreeNode>
        <telerik:RadTreeNode runat="server" Text="Lacebark Elm" ScientificName="Ulmus parvifolia ">
        </telerik:RadTreeNode>
    </Nodes>
</telerik:RadTreeView>
```

```JavaScript
function onNodeClicked(sender, args)  
{    
    var node = args.get_node();    
    alert(node.get_attributes().getAttribute("ScientificName"));
    //you can also set attributes, like:
    //node.get_attributes().setAttribute("ScientificName");
}
```

## See Also

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

* [Custom Attributes Troubleshooting](https://www.telerik.com/products/aspnet-ajax/documentation/controls/treeview/troubleshooting/custom-attributes)