style:
example 1:
[style]="{ 'border-color': control?.controls?.dutyDepartmentId?.errors?.required ? 'red' : '' }"
example 2:
<div [style.color]="'red'" [style.font-size.px]="24">This text is red and has a font size of 24 pixels.</div>
class:
example 1:
<div [class.specile-input]="control?.controls?.dutyDepartmentId?.errors?.required"></div>
example 2:
<div [class]="{ 'specile-input': control?.controls?.dutyDepartmentId?.errors?.required, 'big-text': isBigText }"></div>