express.ui.update_sidebar

express.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 reactive
from shiny.express import input, render, ui

with ui.sidebar(id="sidebar"):
    "Sidebar content"

ui.input_action_button("open_sidebar", label="Open sidebar", class_="me-3")
ui.input_action_button("close_sidebar", label="Close sidebar", class_="me-3")


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


@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)