# Drawer Events
This article explains the events available in the Telerik Drawer for Blazor:
* [`SelectedItemChanged`](https://www.telerik.com/blazor-ui/documentation/components/drawer/events#selecteditemchanged)
* [`ExpandedChanged`](https://www.telerik.com/blazor-ui/documentation/components/drawer/events#expandedchanged)
* [`OnItemRender`](https://www.telerik.com/blazor-ui/documentation/components/drawer/events#onitemrender)
## SelectedItemChanged
The `SelectedItemChanged` event fires every time the user clicks on a new item from the Drawer. You can use it with one-way data binding to respond to the user [selection](https://www.telerik.com/blazor-ui/documentation/components/drawer/selection). It receives an argument of the Drawer data model type.
> caption Handle SelectedItemChanged event
## ExpandedChanged
The `ExpandedChanged` event fires every time the component's state is changed - to expanded or to collapsed. You can use it with one-way data binding for the `Expanded` parameter. It takes an argument of the `bool` type that corresponds to its new state - whether the drawer is expanded.
> tip If you only need conditional markup based on the expanded/collapsed state of the drawer, use two-way binding (`@bind-Expanded`) - in this example, hiding the button conditionally can be achieved either way, but two-way binding requires less code.
> caption Handle ExpandedChanged event
> caption The result from the code snippet above
> tip The event is an `EventCallback`. It can be synchronous and return `void`, or asynchronous and return `async Task`. Do not use `async void`.
> note The lambda expression in the handler is required by the framework: .
## OnItemRender
The `OnItemRender` event fires when each item in the Drawer renders. It allows you to customize the appearance of an item. Note that the event does not work alongside a [``](https://www.telerik.com/blazor-ui/documentation/components/drawer/templates#template), as the template disables all item related built-in features of the Drawer.
As an argument, the event handler receives an object of type `DrawerItemRenderEventArgs` that contains the following properties:
| Property | Type | Description |
| -------- | -------- | ---------------------------------------------------- |
| `Item` | `object` | The current item that renders in the Drawer. |
| `Class` | `string` | The custom CSS class that will be added to the item. |
> caption Customizing the appearance of the Drawer items based on the Drawer mode.
## See Also
* [Drawer Demos](https://demos.telerik.com/blazor-ui/drawer/overview)