Treeview check all button is not dependent on elements checks, partial/intermidiate not working

[Kishor]

If we have tree view with added check box (check all) at top, and if you change any node check from tree view it does not show partial selection to a external checkbox (check all).
and we have to toggle check/uncheck programmatically on check all checkbox.
It should have facility to make it dependent on treeview nodes.

[Kishor]

Below Image shows the requirement

[Vishwanathan Muruganantham]

Hi Kishor,

Greetings from Syncfusion support.

We have validated the reported issue. Currently, the CheckAll checkbox updates only when all nodes are checked or unchecked. We are not maintaining an indeterminate state due to performance considerations for each checkbox action. If you need further assistance, please get back to us.

Best regards,

Vishwanathan