ui.update_accordion_panel(id, target, *body, title=MISSING, value=MISSING, icon=MISSING, show=None, session=None)

Dynamically update accordion panel contents.

Dynamically (i.e., programmatically) update/modify accordion panels in a Shiny app. These functions require an id to be provided to the accordion and must also be called within an active Shiny session.


id: str

A string that matches an existing accordion’s id.

target: str

The value of an existing panel to update.

*body: TagChild = ()

If provided, the new body contents of the panel.

title: TagChild | None | MISSING_TYPE = MISSING

If not missing, the new title of the panel.

value: str | None | MISSING_TYPE = MISSING

If not missing, the new value of the panel.

icon: TagChild | None | MISSING_TYPE = MISSING

If not missing, the new icon of the panel.

session: Optional[Session] = None

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


Bootstrap Accordion

See Also


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

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

def make_panel(letter: str) -> ui.AccordionPanel:
    return ui.accordion_panel(
        f"Section {letter}",
        f"Some narrative for section {letter}",

items = [make_panel(letter) for letter in "ABCDE"]

app_ui = ui.page_fluid(
    ui.input_switch("update_panel", "Update (and open) Sections"),
    ui.accordion(*items, id="acc", multiple=True),

def server(input: Inputs, output: Outputs, session: Session):
    def _():
        txt = " (updated)" if input.update_panel() else ""
        show = bool(input.update_panel() % 2 == 1)
        for letter in "ABCDE":
                f"Some{txt} narrative for section {letter}",
                title=f"Section {letter}{txt}",
                # Open Accordion Panel to see updated contents
        next_show_txt = "close" if show else "open"

        ui.update_switch("update_panel", label=f"Update (and {next_show_txt}) Sections")

app = App(app_ui, server)