gistfile1.html

<div> My name is {{name}} </div>
<div>
  <!-- '#' creates a local variable called newname -->
  <input #newname type="text" />
  <!-- newname can now be used locally -->
  <button (click)="changeName(newname.value)"
          [disabled]="newname.value === 'david'">
    <!-- (click) is an event binding that can take any event registered in the DOM -->
    <!-- [disabled] is an attribute binding -->
    Change Name
  </button>
</div>