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The OnClientTabSelecting client-side event occurs when the user selects a tab, before the tab is selected.

The event handler receives two parameters:

  1. The instance of the tab strip firing the event.

  2. An eventArgs parameter containing the following methods:

  • get_tab returns a reference to the RadTab that is about to be selected.

  • set_cancel lets you stop the selection by passing true to the set_cancel method.

  • get_domEvent returns a reference to the DOM object for the event that caused the selection.

You can use this event to pre-process a tab's selection or to cancel the default response:

function OnClientTabSelecting(sender, eventArgs)
var tab = eventArgs.get_tab();
var navigateUrl = tab.get_navigateUrl();
if (navigateUrl && navigateUrl != "#")
   var proceed = confirm("Navigate to "+ navigateUrl + " ?");
   if (!proceed)
<telerik:RadTabStrip RenderMode="Lightweight" ID="RadTabStrip1" runat="server" OnClientTabSelecting="OnClientTabSelecting" ... />    
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