keydown shift tab angular

1  /**
2   * To handle tab key down
3   * @param $event object
4   */
5  onTabPress($event) {
6    /*
7    Here you will press tab or shift+tab. 
8    In both the cases this.isOptionListVisible will be set to false.
9    <input
10        type="text"
11        (keydown)="onTabPress($event)"
12        />
13    */
14    if ($event.key === 'Tab') {
15      this.isOptionListVisible = false;
16    }
17  }