# OnClientModeChange

This event is fired before the mode is changed.

| **function OnClientModeChange(editor, args)** |            |                                                |
| --------------------------------------------- | ---------- | ---------------------------------------------- |
| **editor**                                    | **object** | Returns a reference to RadEditor client object |
| **args**                                      | **object** | Returns the needed information about the event |

The following example demonstrates how to check the current mode of Telerik RadEditor:

```ASP.NET
<script type="text/javascript">
	function OnClientModeChange(editor, args)
	{
		var mode = editor.get_mode();
		switch (mode)
		{
			case 1:
				alert("We are in Design mode");
				//do something
				break;
			case 2:
				alert("We are in Html mode");
				//do something
				break;
			case 4:
				alert("We are in Preview mode");
				//do something
				break;
		}
	}
</script>
<telerik:radeditor runat="server" OnClientModeChange="OnClientModeChange" ID="RadEditor1"></telerik:radeditor>   
```