Disable some item from dropdown

How can I Disable some value from dropdown? Based on some requirement I need to disable "Dublin" value from dropdown (see screenshot). I will dynamic based on condition. Thanks !

Disabling of individual dropdown item is not supported. You can try filling the dropdown items conditionally

I need to show all value but some will be disable based on condition. Thanks !

For such needs you need to apply filter to data to load only the selectable items and exclude the disabled items from the list. You can apply filter for the dropdown data refer to demo for more about loaddata method