ui.update_sidebar

ui.update_sidebar(id, *, show=None, session=None)

Update a sidebar's visibility.

Set a sidebar state during an active Shiny user session.

Parameters

id: str

The id of the sidebar to toggle.

show: Optional[bool] = None

The desired visible state of the sidebar, where True opens the sidebar and False closes the sidebar (if not already in that state).

session: Optional[Session] = None

A Shiny session object (the default should almost always be used).

See Also

• sidebar
• layout_sidebar

Examples

#| standalone: true
#| components: [editor, viewer]
#| layout: vertical
#| viewerHeight: 400

## file: app.py
from shiny import App, Inputs, Outputs, Session, reactive, render, ui

app_ui = ui.page_sidebar(
    ui.sidebar("Sidebar content", id="sidebar"),
    ui.input_action_button("open_sidebar", label="Open sidebar", class_="me-3"),
    ui.input_action_button("close_sidebar", label="Close sidebar", class_="me-3"),
    ui.br(),
    ui.br(),
    ui.output_text_verbatim("state"),
    fillable=False,
)


def server(input: Inputs, output: Outputs, session: Session):
    @reactive.effect
    @reactive.event(input.open_sidebar)
    def _():
        ui.update_sidebar("sidebar", show=True)

    @reactive.effect
    @reactive.event(input.close_sidebar)
    def _():
        ui.update_sidebar("sidebar", show=False)

    @render.text
    def state():
        return f"input.sidebar(): {input.sidebar()}"


app = App(app_ui, server=server)