The TreeView exposes drag events that allow me to detect when the user drags an item and to get the information for the dragged item. I want to be able to drag that item outside of the TreeView and drop it in my custom target.

I am aware that I should handle the custom drop functionality. However, the @ondrop event of my custom target currently does not fire for the tree item: https://blazorrepl.telerik.com/QIblPZvd0412k6U128.

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ADMIN EDIT

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For the time being, you may implement the following custom approach:

• Use the ItemTemplate.
• Wrap the item text in a container.
• Enable the draggable attribute of that container. Disable the Draggable parameter of the Treeview, so these properties do not interfere with each other. This approach overrides the built-in behavior of the drag-and-drop functionality, so it cannot be enabled at the same time.  If you want to keep the built-in draggable functionality, implement aa suitable UI that toggles that during runtime.
• Handle the ondragstart event of the container.

Here is a basic sample showcasing the approach: https://blazorrepl.telerik.com/QIFbvZFA00bHZbsj23.