if condition is true ngclass apply if false not apply in angular 6 code example
Example 1: Angular 8 ngClass If
[ngClass]="{1:'my-class1',2:'my-class2',3:'my-class4'}[step]"
Example 2: Angular 8 ngClass If
[class.my-class]="step=='step1'"
[ngClass]="{1:'my-class1',2:'my-class2',3:'my-class4'}[step]"
[class.my-class]="step=='step1'"