python shiny, I cannot get ui.update_sidebar to hide the sidebar.

Hello, I am trying to get my feet wet with shiny core for python. While I am not entirely new to shiny, having dabbled with rshiny a few years ago I was never proficient with it either, python is a totally different environment too. Anyways I am trying to figure out why ui.update_sidebar in my code isn't working so I recreated a minimal reprex in a new app.py file to see if I could figure out what I am doing wrong. Even in this minimal example I can't figure out what is wrong.

Basically I took the example code from the python shiny website to create a ui.navset_tab with a ui.page_sidebar, ui.input_action_button and ui.update_sidebar. I put an action button in the main window and set a @reactive.event to hide the sidebar when the action button is selected. This does not seem to work for some reason though. I guess I am doing something wrong but I can't figure out what.

from shiny import App, ui, reactive, render, Inputs, Outputs, Session

app_ui = ui.page_fluid(
    ui.navset_tab(  
        ui.nav_panel("A", "Panel A content"),
        ui.nav_panel("B", "Panel B content"),
        ui.nav_panel("C", "Panel C content"),
        ui.nav_menu(
            "Other links",
            ui.nav_panel("D", "Panel D content"),
            "----",
            "Description:",
            ui.nav_control(
                ui.a("Shiny", href="https://shiny.posit.co", target="_blank")
            ),
        ),
        id="tab",  
    ),

ui.page_sidebar(  
    ui.sidebar(sidebar="Sidebar", bg="#f8f8f8"),  
    "Main content",
    #when the action_button is clicked the side Sidebar should be hidden
    ui.input_action_button(id="action_button", label="Action", width="20%", show=True)
)  

)


def server(input: Inputs, output: Outputs, session: Session):
    #the action button should close the sidebar
    @reactive.effect
    @reactive.event(input.action_button)
    def close_sidebar():
        ui.update_sidebar(id="Sidebar", show=False)


app = App(app_ui, server)

Hello,

Just a small mistake here: in ui.sidebar you should set the id instead of the sidebar parameter

ui.sidebar(id="Sidebar", bg="#f8f8f8")

Now it should work :slight_smile:

Hope this helps,
PJ

WOW, thanks
/facepalm