angular use css class if code example
Example 1: add classon ng if
[ngClass]="{'my-class': step === 'step1'}"
Example 2: Angular 8 ngClass If
[ngClass]="{1:'my-class1',2:'my-class2',3:'my-class4'}[step]"
[ngClass]="{'my-class': step === 'step1'}"
[ngClass]="{1:'my-class1',2:'my-class2',3:'my-class4'}[step]"