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Breaking Change T875624
Visible to All Users

TreeView - Click on a node's expand/collapse button no longer invokes an action associated with a click on the node itself

What Changed

We changed the expand/collapse button behavior to make it more intuitive and avoid errors with TreeView navigation. Click on this button only expands/collapses the corresponding node.

Reasons for Change

In previous versions, click on a TreeView node's expand/collapse button not only expanded/collapsed the node, but also invoked an action associated with a click on the node itself (for instance, selected the node). However, if a user specified the NavigateUrl or NavigateUrlExpression property, click on the expand/collapse button opened another web page with a specified URL. So, users could not expand/collapse non-leaf nodes. See T822277 for more information.

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