Power Button Examples and Reference

Default Power Button

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

import dash
import dash_daq as daq
import dash_html_components as html

external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']

app = dash.Dash(__name__, external_stylesheets=external_stylesheets)

app.layout = html.Div([

    dash.dependencies.Output('power-button-output', 'children'),
    [dash.dependencies.Input('my-power-button', 'on')])
def update_output(on):
    return 'The button is {}.'.format(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


Power Button Properties

Access this documentation in your Python terminal with:


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

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

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

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

label (dict; optional): Description to be displayed alongside the button. To control styling, pass an object with label and style properties. label has the following type: string | dict containing keys ‘style’, ‘label’. Those keys have the following types:

  • style (dict; optional)
  • label (string; optional)

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

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

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 a value equal to: ‘on’s; 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’, ‘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.

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

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

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