<iframe
 #Iframe
 [src]="testUrl"
 frameborder="0"
 width="100%"
 height="100%">
 </iframe>

...省略
export class DesignWebInputComponent implements OnInit{
 testUrl ;
}

constructor( private sanitizer:DomSanitizer) {}

 trustUrl(url: string) {
 if(url){
 return this.sanitizer.bypassSecurityTrustResourceUrl(url);
 }
 }

 <iframe
 #Iframe
 [src]="trustUrl(testUrl)"
 frameborder="0"
 width="100%"
 height="100%">
 </iframe>