Demos
Input(React)
ComboBox
Objects
Chaining Combos

Chaining ComboBoxes (React)

This sample demonstrates how to chain two ComboBoxex using filtering and binding.

The source for the first ComboBox is used to filter out options in the second ComboBox.

When you select a country from the first ComboBox below, the second will be filtered to show only cities in that country.

Learn about Input Controls | ComboBox API Reference

This example uses React.

JavaScript
Angular
Vue
React
app.jsx
index.html
app.css
data.jsx
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import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import ReactDOM from 'react-dom/client';
import React from 'react';
import { CollectionView } from '@mescius/wijmo';
import { ComboBox } from '@mescius/wijmo.react.input';
import { getCountries, getCities } from './data';
const cities = new CollectionView(getCities());
const countries = new CollectionView(getCountries(), {
    currentChanged: (sender) => {
        cities.refresh(); // apply the filte
    }
});
cities.filter = (city) => {
    return countries.currentItem.id == city.country;
};
function App() {
    return (<div className="container-fluid">
      <ComboBox displayMemberPath="name" itemsSource={countries}/>
      <ComboBox displayMemberPath="name" itemsSource={cities}/>
    </div>);
}
const container = document.getElementById('app');
if (container) {
    const root = ReactDOM.createRoot(container);
    root.render(<App />);
}
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React from 'react'; import { CollectionView } from '@mescius/wijmo'; import { ComboBox } from '@mescius/wijmo.react.input'; import { getCountries, getCities } from './data'; const cities = new CollectionView(getCities()); const countries = new CollectionView(getCountries(), { currentChanged: (sender) => { cities.refresh(); // apply the filte } }); cities.filter = (city) => { return countries.currentItem.id == city.country; }; function App() { return (<div className="container-fluid"> <ComboBox displayMemberPath="name" itemsSource={countries}/> <ComboBox displayMemberPath="name" itemsSource={cities}/> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Chaining Combos</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
body { margin-bottom: 24px; }
export function getCountries() { return [ { id: 0, name: 'US' }, { id: 1, name: 'Germany' }, { id: 2, name: 'UK' }, { id: 3, name: 'Japan' }, { id: 4, name: 'Italy' }, { id: 5, name: 'Greece' } ]; } export function getCities() { return [ { id: 0, country: 0, name: 'Washington' }, { id: 1, country: 0, name: 'Miami' }, { id: 2, country: 0, name: 'Seattle' }, { id: 3, country: 1, name: 'Bonn' }, { id: 4, country: 1, name: 'Munich' }, { id: 5, country: 1, name: 'Berlin' }, { id: 6, country: 2, name: 'London' }, { id: 7, country: 2, name: 'Oxford' }, { id: 8, country: 2, name: 'Manchester' }, { id: 9, country: 3, name: 'Tokyo' }, { id: 10, country: 3, name: 'Sendai' }, { id: 11, country: 3, name: 'Kobe' }, { id: 12, country: 4, name: 'Rome' }, { id: 13, country: 4, name: 'Florence' }, { id: 14, country: 4, name: 'Milan' }, { id: 15, country: 5, name: 'Athens' }, { id: 16, country: 5, name: 'Santorini' }, { id: 17, country: 5, name: 'Thebes' } ]; }
(function (global) { window.process = { env: { NODE_ENV: "production" } } System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 'npm:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'npm:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'npm:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'npm:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'npm:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.style': 'npm:@mescius/wijmo.grid.style/index.js', 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'npm:@mescius/wijmo.odata/index.js', '@mescius/wijmo.olap': 'npm:@mescius/wijmo.olap/index.js', '@mescius/wijmo.rest': 'npm:@mescius/wijmo.rest/index.js', '@mescius/wijmo.pdf': 'npm:@mescius/wijmo.pdf/index.js', '@mescius/wijmo.pdf.security': 'npm:@mescius/wijmo.pdf.security/index.js', '@mescius/wijmo.viewer': 'npm:@mescius/wijmo.viewer/index.js', '@mescius/wijmo.xlsx': 'npm:@mescius/wijmo.xlsx/index.js', '@mescius/wijmo.undo': 'npm:@mescius/wijmo.undo/index.js', '@mescius/wijmo.interop.grid': 'npm:@mescius/wijmo.interop.grid/index.js', '@mescius/wijmo.barcode': 'npm:@mescius/wijmo.barcode/index.js', '@mescius/wijmo.barcode.common': 'npm:@mescius/wijmo.barcode.common/index.js', '@mescius/wijmo.barcode.composite': 'npm:@mescius/wijmo.barcode.composite/index.js', '@mescius/wijmo.barcode.specialized': 'npm:@mescius/wijmo.barcode.specialized/index.js', "@mescius/wijmo.react.chart.analytics": "npm:@mescius/wijmo.react.chart.analytics/index.js", "@mescius/wijmo.react.chart.animation": 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'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js', "react-use-event-hook": "npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);