add class name dynamically angular code example

Example 1: Angular add class dynamically

<button 
  *ngFor="let button of buttons" 
  class="general" 
  (click)="ChangeScreen(button.label)" 
  [class.selected]="CurrentPage == button.label">
  {{ button.label }}
</button>

Example 2: angular ngclass

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      <some-element [ngClass]="'first second'">...</some-element>

<some-element [ngClass]="['first', 'second']">...</some-element>

<some-element [ngClass]="{'first': true, 'second': true, 'third': false}">...</some-element>

<some-element [ngClass]="stringExp|arrayExp|objExp">...</some-element>

<some-element [ngClass]="{'class1 class2 class3' : true}">...</some-element>