condition based class in angular 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: ngclass condition

[class.my-class]="step === 'step1'"