combo non selectable values

Can I have some values in a combo that the user can’t select?
for example if I have a combo for employees, I want to user to only be able to select active employees but I also want the inactive employees to be in the combo as not break the form for records entered when they were active.
so is there a way that I can have for example active selectable records and dimmed non selectable records?

Hello,
If I correctly understood you. There’s no built-in solution for such task, but it is possible to add the disabled-like CSS and prevent setting a particular value. Check the snippet: http://webix.com/snippet/26404392

you can also filter disabled items out in onBeforeShow event
https://snippet.webix.com/0w3xi7f0