Method open

src/cdk/menu/menu-trigger.ts:115–128

Open the attached menu.

()

  /** Open the attached menu. */
  open() {
    if (!this._parentMenu) {
      this._menuTracker.update(this);
    }
    if (!this.isOpen() && this.menuTemplateRef != null) {
      this.opened.next();

      this.overlayRef =
        this.overlayRef || createOverlayRef(this._injector, this._getOverlayConfig());
      this.overlayRef.attach(this.getMenuContentPortal());
      this._changeDetectorRef.markForCheck();
      this._subscribeToOutsideClicks();
    }
  }

  /** Close the opened menu. */
  close() {