@ViewChild("tagInput") tagInput: ElementRef;
 private tagifyInput: Tagify;

 ngAfterViewInit() {
 // Access the native input element
 const inputElement: HTMLInputElement = this.tagInput.nativeElement;

 // Initialize Tagify
 this.tagifyInput = new Tagify(inputElement, {
 // Tagify options go here
 });
 }

<input #tagInput placeholder="Type and press Enter" value="tag1, tag2 autofocus">