Function _handleFocus

src/cdk/menu/menu-base.ts:266–277

Handles focus landing on the host element of the menu.

()

  /** Handles focus landing on the host element of the menu. */
  private _handleFocus() {
    this._focusMonitor
      .monitor(this.nativeElement, false)
      .pipe(takeUntil(this.destroyed))
      .subscribe(origin => {
        // Don't forward focus on mouse interactions, because it can
        // mess with the user's scroll position. See #30130.
        if (origin !== null && origin !== 'mouse') {
          this.focusFirstItem(origin);
        }
      });
  }
}