Method _subscribeToOutsideClicks

src/cdk/menu/menu-trigger.ts:325–343

* Subscribe to the overlays outside pointer events stream and handle closing out the stack if a * click occurs outside the menus.

()

   * click occurs outside the menus.
   */
  private _subscribeToOutsideClicks() {
    if (this.overlayRef) {
      this.overlayRef
        .outsidePointerEvents()
        .pipe(takeUntil(this.stopOutsideClicksListener))
        .subscribe(event => {
          const target = _getEventTarget(event) as Element;
          const element = this._elementRef.nativeElement;

          if (target !== element && !element.contains(target)) {
            if (!this.isElementInsideMenuStack(target)) {
              this.menuStack.closeAll();
            } else {
              this._closeSiblingTriggers();
            }
          }
        });
    }
  }

  /** Subscribe to the MenuStack hasFocus events. */
  private _subscribeToMenuStackHasFocus() {