Two Dropdowns that depend on eachother

[caiyij]

Here’s an example for dropdown updating another dropdown:

Dropdown updating dropdown?

Welcome @mikej! The example that you found in the user guide is the right example to be looking at. In fact, you should be able to just change that example from dcc.RadioItems to dcc.Dropdown and it should work: [multiple-city-chained-dropdown] # -*- coding: utf-8 -*- import dash from dash.dependencies import Input, Output import dash_core_components as dcc import dash_html_components as html app = dash.Dash(__name__) all_options = { 'America': ['New York City', 'San Francisco', 'Cincin…