title: HostListener to analyse combination key press
body: <p>I am trying to trace when a user presses a Shift+Tab combination key using keyboard, but I am not able to fire that event  </p>
  
  <pre><code>@HostListener('keyup', ['$event'])
  @HostListener('keydown', ['$event'])
  
  onkeyup(event) {
    if (event.keyCode == 16 &amp;&amp; event.keyCode == 9) {
      this.isShift = true;
      console.log("On Keyup " + event.keyCode);
    }
  }
  
  onkeydown(event) {
    console.log("On KeyDown" + event.keyCode);
  }
  </code></pre>