问角常春藤类型检查:键入“SafeHtml”不能指定键入“string”

EN

[Step 4/5] src/app/app.component.html(1,26): Type 'SafeHtml' is not assignable to type 'string'.

@Component({
  selector: 'app',
  template: `<div [innerHTML]="description"></div>`
})
export class AppComponent {
  description: SafeHtml;

  constructor(private sanitizer: DomSanitizer) {}

  ngOnInit(): void {
    this.description = this.sanitizer.sanitize(SecurityContext.HTML, '<strong>whatever comes from server</strong>');
  }
}

/**
 * Marker interface for a value that's safe to use as HTML.
 *
 * @publicApi
 */
export declare interface SafeHtml extends SafeValue {
}

interface InnerHTML {
    innerHTML: string;
}

git clone https://github.com/felikf/angular-repro-safe-html.git
npm i
npm run build