For my use case the user should only be able to select Item 1.1, Item 1.2.1, Item 1.2.2 and Item 2.1. If you look closely you will see those items don't have any children. That's the criteria. Only items with no children should be selectable. This is because I render items with "paths" into a Tree for easier navigation as many options are available. Only those unique items are able for selection:
ILIndhumathy Loganathan Syncfusion Team December 19, 2022 08:04 AM UTC
from Syncfusion support.
we don’t have support to prevent selection of parent node in Dropdown Tree. We
have considered your request as a feature and this will be included in any of
our upcoming releases. Generally, we will plan any feature implementation based
on customer request count, feature rank and Wishlist plan for some feature.
track the feature status through the below link: