apply class on condition in angular 6 code example

Example 1: ngclass condition

[ngClass]="(step=='step1')?'my-class1':'my-class2'"

Example 2: if condition in class angular 8

<i [class]="user.login_status == 1 ? 'fas fa-circle user_active' : 'fas fa-circle user_inactive'" aria-hidden="true"></i>

Example 3: conditionally assign a css class angular 9

<div [ngClass]="{'message': info.priority < 10,
                 'warn': info.priority > 10 && info.priority < 20, 
                 'error': info.priority > 30}">

{{info.text}}

</div>

Example 4: conditional classes angular

<div 
  [className]="isActive ? 'active' : 'inactive'">
</div>

Example 5: ngclass condition

[ngClass]="{'my-class': step === 'step1', 'my-class2':step === 'step2' }"