Power Button Examples and Reference

Default Power Button

An example of a default power button without any extra properties.

from dash import Dash, html, Input, Output, callback
import dash_daq as daq

app = Dash(__name__)

app.layout = html.Div([

    Output('power-button-result-1', 'children'),
    Input('our-power-button-1', 'on')
def update_output(on):
    return f'The button is {on}.'

if __name__ == '__main__':


Set the label and label position with label and labelPosition.

import dash_daq as daq



Adjust the size (diameter in pixels) of the power button with size.

import dash_daq as daq



Set the color of the power button with color.

import dash_daq as daq


PowerButton Properties

Access this documentation in your Python terminal with:


Our recommended IDE for writing Dash apps is Dash Enterprise’s
Data Science Workspaces,
which has typeahead support for Dash Component Properties.
Find out if your company is using
Dash Enterprise

id (string; optional):
The ID used to identify this compnent in Dash callbacks.

on (boolean; default False):
Whether or not the power button is on.

color (string; optional):
The indicator color to display when power button is on.

size (number; default 48):
The size (diameter) of the power button in pixels.

disabled (boolean; optional):
If True, power button cannot be clicked.

theme (dict; default light):
Theme configuration to be set by a ThemeProvider.

label (dict; optional):
Description to be displayed alongside the button. To control styling,
pass an object with label and style properties.

label is a string | dict with keys:

  • label (string; optional)

  • style (dict; optional)

labelPosition (a value equal to: ‘top’ or ‘bottom’; default 'top'):
Where the button label is positioned.

className (string; optional):
Class to apply to the root component element.

style (dict; optional):
Style to apply to the root component element.

persistence (boolean | string | number; optional):
Used to allow user interactions in this component to be persisted when
the component - or the page - is refreshed. If persisted is truthy
and hasn’t changed from its previous value, a value that the user
has changed while using the app will keep that change, as long as the
new value also matches what was given originally. Used in
conjunction with persistence_type.

persisted_props (list of values equal to: ‘on’; default ['on']):
Properties whose user interactions will persist after refreshing the
component or the page. Since only on is allowed this prop can
normally be ignored.

persistence_type (a value equal to: ‘local’, ‘session’ or ‘memory’; default 'local'):
Where persisted user changes will be stored: memory: only kept in
memory, reset on page refresh. local: window.localStorage, data is
kept after the browser quit. session: window.sessionStorage, data is
cleared once the browser quit.