Datatree checkboxes

Good day dear webix community members.

Can you please avdice me how can i check child items in datatree node?
Methods checkAll\uncheckAll does not work :frowning:

checkAll is the necessary API

Check the next example http://webix.com/snippet/c702adfe

If you are loading data by ajax, be sure that you are calling API after data loading ( onAfterLoad event or loading callback )

Thank you for your comment, but this is not quite i’m looking for.
Is it possible to mark all child nodes checked when checking parent?

Like Node4 at this picture:

I’m using OnItemCheck event, and if i’ll use checkAll method application goes into infinite loop.

Do you mean, something like 3-state checkboxes?

http://webix.com/snippet/94383763

Yes, this is absolutely perfect, thank you.