import { Directive , ElementRef , Input , Renderer2 } from "@angular/core" ; @ Directive ( { selector : "[appA11yTitle]" , } ) export class A11yTitleDirective { @ Input ( ) set appA11yTitle ( title ) { this . title = title ; } private title : string ; constructor ( private el , private renderer ) { } ngOnInit ( ) { if ( ! this . el . nativeElement . hasAttribute ( "title" ) ) { this . renderer . setAttribute ( this . el . nativeElement , "title" , this . title ) ; } if ( ! this . el . nativeElement . hasAttribute ( "aria-label" ) ) { this . renderer . setAttribute ( this . el . nativeElement , "aria-label" , this . title ) ; } } }