How to make button disabled in Angular?

To make button disabled in Angular, we set the [disabled] attribute.

For instance, we write

<button [disabled]="!editmode ? 'disabled' : null" (click)="loadChart()">
  <div class="btn-primary">Load Chart</div>
</button>

to set the [disabled] attribute to 'disabled' if editmode is false.

Otherwise, we set it to null to keep the button enabled.