how to add class based on condition in angular code example

Example 1: Angular 8 ngClass If

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

Example 2: ngclass condition

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

Example 3: ngclass condition

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

Example 4: Angular 8 ngClass If

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