RadSplitter does not offer the required functionality out-of-the-box. Nevertheless, you can achieve the required functionality using the following approach:
- Assign handler to the ClientBeforeExpand client-side event of the sliding pane, and cancel the execution.
- Handle the splitter's load event to get reference to the sliding pane's tab element and assign handler to its click event and set window.location to the URL that the page should be redirected.
For your convenience I have attached sample page demonstrating this approach.
All the best,
the Telerik team
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