Method expand

src/aria/private/menu/menu.ts:424–433

Expands the current menu or focuses the next item in the menubar.

()

  /** Expands the current menu or focuses the next item in the menubar. */
  expand() {
    const root = this.root();
    const activeItem = this.inputs.activeItem();

    if (activeItem?.submenu()) {
      activeItem.open({first: true});
    } else if (root instanceof MenuBarPattern) {
      root.next();
    }
  }

  /** Closes the menu. */
  close() {