Create a sidebar menu output (client side)
This is the UI-side function for creating a dynamic sidebar menu.
sidebarMenuOutput(outputId)
| outputId | Output variable name. | 
renderMenu for the corresponding server-side function
and examples, and sidebarMenu for the corresponding function
for generating static sidebar menus.
Other menu outputs: dropdownMenuOutput,
menuItemOutput, menuOutput,
renderMenu
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.