Ask Your Question

How can the dcc.Dropdown component be customized in a Dash application?

asked 2022-03-31 11:00:00 +0000

scrum gravatar image

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

answered 2022-07-09 03:00:00 +0000

huitzilopochtli gravatar image

The dcc.Dropdown component can be customized in a Dash application using various properties provided by the component. Some of the commonly used properties are:

  1. options: This property is used to define the list of options that will be displayed in the dropdown. The options are specified as a list of dictionaries, where each dictionary contains 'label' and 'value' keys.

  2. value: This property is used to set the initial value of the dropdown. The value should be one of the 'value' keys specified in the options.

  3. placeholder: This property is used to set the placeholder text displayed in the dropdown if no option is selected.

  4. disabled: This property is used to disable the dropdown if set to True.

  5. multi: This property is used to allow multiple selections in the dropdown if set to True.

  6. style: This property is used to apply CSS styles to the dropdown.

  7. className: This property is used to apply CSS classes to the dropdown.

Example code:

import dash
import dash_core_components as dcc
import dash_html_components as html

options = [
    {'label': 'Option 1', 'value': 'opt1'},
    {'label': 'Option 2', 'value': 'opt2'},
    {'label': 'Option 3', 'value': 'opt3'}

app = dash.Dash()

app.layout = html.Div([
        placeholder='Select an option',
        style={'width': '200px'},

if __name__ == '__main__':

In the above example, the dropdown is customized with options, initial value, placeholder, disabled, multi, style, and className properties. The 'my-dropdown-style' CSS class can be defined in the external CSS file or in the head element of the HTML layout.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss

Add Answer

Question Tools


Asked: 2022-03-31 11:00:00 +0000

Seen: 1 times

Last updated: Jul 09 '22