"disable in WHEN" ng-option code example
Example: ng-select disabled
// If you are using the Angular reactive form and trying to disable the ng-select using the following code then sorry it will not work in some case. If you are using formControlName then it will not work but work in [(ngModel)] case.
[disabled] = true
// The best way to do this is by using reactive form control.
this.createReactiveform.controls['some_key'].disable();