bug(aria/menu): focusFirstItem method does not exist

[vprint]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

focusFirstItem is a Menu method described here https://angular.dev/guide/aria/menu. However it looks like this method is not truly implemented, as i can't access it (TS2339: Property focusFirstItem does not exist on type Menu<string)

Reproduction

<div ngMenu class="menu" #formatMenu="ngMenu">
    <ng-template ngMenuContent>
      @if (geocoderService.hasSuggestions()) {
        @for (suggestion of geocoderService.suggestions(); track suggestion) {
          <div ngMenuItem [value]="getTitle(suggestion)">
            <span class="label">{{ getTitle(suggestion) }}</span>
          </div>
        }
      }

      @if (geocoderService.suggestions().length === 0 && geocoderService.userInput().length >= 3) {
        <div ngMenu class="menu">
          <div ngMenuItem value="{{ UiText[Components.Geocoder].notFound }}">
            <span class="label">{{ UiText[Components.Geocoder].notFound }}</span>
          </div>
        </div>
      }
    </ng-template>
  </div>

export class AriaGeocoderMenu {
  protected geocoderService = inject(GeocoderService);
  protected formatMenu = viewChild<Menu<string>>('formatMenu');

  protected constructor() {
    effect(() => {
      const suggestions = this.geocoderService.suggestions()

      if (suggestions) {
        this.formatMenu()?.focusFirstItem()
        // This throw `TS2339: Property focusFirstItem does not exist on type Menu<string>`
      }
    })
  }
}

Expected Behavior

focusFirstItem implemented

Actual Behavior

focusFirstItem is not implemented while documented.

Environment

• Aria: (Angular 21) Menu
• Browser(s): Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Windows