[disabled] option doesn't work

I have tried adding the option [disabled]=“true” to an ng-select as shown here:

https://ng-select.github.io/ng-select#/multiselect

However I receive the following runtime error in the browser console:

Can't bind to 'disabled' since it isn't a known property of 'ng-select'.

I would like to use the option on a single select if possible, but I have tested on both a single and multi select and it doesn’t work in either case. Other options work as expected.

More Info

ng-select version: 0.35.1

browser: Chrome, IE11

reproducible in demo page: NO

[arkonbob]

@varnastadeus Yes, adding [(ngModel)] to the ng-select fixed it. Many thanks!

[jagomf]

Probably it means that ng-select cannot be disabled unless it is inside and bound to a form.