title: Angular 4 Click + ngClass, how to apply ONLY to SELF but not ALL elements inside ngFor
body: <p>In Angular 2 when I clicked the button, it added class "newstyle" every "button" inside the ngFor loop... how do I bind the ngClass condition to the element itself only?</p>
  
  <pre><code>&lt;button [ngClass]="{'newstyle': isClicked }" (click)=" isClicked = !isClicked"&gt;Click button&lt;/button&gt;
  </code></pre>
  
  <p>Thank you!</p>