trying

today = String(Date.now());

  tagsListArray: any[] = [];

  constructor(
      private elementRef: ElementRef,
      private tagsGetterService: TagsService,
      private queryUrlService: QueryUrlBuilderService,
      private chartDataService: ChartDataService
      ) { }

  ngAfterContentInit() {
    this.getTags();
    this.elementRef.nativeElement.querySelector('#endDate').defaultValue = this.today;
  }