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Radio Group

Radio Group

The RadioGroup component contains a set of radio buttons and allows users to select one item from it. This demo illustrates how to bind the component to data, change the component layout, define a custom template, and handle the value change event.

Bind RadioGroup to Data

You can display RadioGroup items from the items array or a dataSource. If your data is an array of objects, use the displayExpr and valueExpr properties. displayExpr specifies a data source field that contains button captions. valueExpr specifies a data source field that supplies values to the value property when users select a button. Leave valueExpr unspecified if you need to supply the entire data object to the value property.

Configure the Layout

The RadioGroup supports horizontal (default for tablets) and vertical (default for other devices) layouts. To change the layout for all device types, specify the layout property.

Customize the Item Appearance

Define the itemTemplate to customize the item appearance. To customize an individual item, specify its template property.

Handle the Value Change Event

You can set the value property to one of the data source items to specify a predefined selection. Implement the onValueChanged function to handle value changes.

Backend API
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import React from 'react'; import RadioGroup from 'devextreme-react/radio-group'; import { priorities, priorityEntities, tasks } from './data.js'; class App extends React.Component { constructor(props) { super(props); this.state = { colorPriority: priorities[2], selectionPriority: priorityEntities[0].id, }; this.changeColorPriority = this.changeColorPriority.bind(this); this.changeSelectionPriority = this.changeSelectionPriority.bind(this); } render() { return ( <div className="form"> <div className="dx-fieldset"> <div className="dx-field"> <div className="dx-field-label">Default mode</div> <div className="dx-field-value"> <RadioGroup items={priorities} defaultValue={priorities[0]} /> </div> </div> <div className="dx-field"> <div className="dx-field-label">Disabled</div> <div className="dx-field-value"> <RadioGroup items={priorities} defaultValue={priorities[1]} disabled={true} /> </div> </div> <div className="dx-field"> <div className="dx-field-label">Horizontal layout</div> <div className="dx-field-value"> <RadioGroup items={priorities} defaultValue={priorities[0]} layout="horizontal" /> </div> </div> <div className="dx-field"> <div className="dx-field-label">Custom item template</div> <div className="dx-field-value"> <RadioGroup className={this.state.colorPriority.toLowerCase()} items={priorities} value={this.state.colorPriority} itemRender={renderCustomItem} onValueChanged={this.changeColorPriority} /> </div> </div> <div className="dx-field"> <div className="dx-field-label">Event handling</div> <div className="dx-field-value"> <RadioGroup id="radio-group-with-selection" items={priorityEntities} value={this.state.selectionPriority} valueExpr="id" displayExpr="text" onValueChanged={this.changeSelectionPriority} /> </div> </div> </div> <div id="tasks-list"> Tasks by selected priority: <ul id="list"> {tasks.filter((task) => task.priority === this.state.selectionPriority) .map((task) => <li key={task.id}>{task.subject}</li>)} </ul> </div> </div> ); } changeColorPriority(e) { this.setState({ colorPriority: e.value, }); } changeSelectionPriority(e) { this.setState({ selectionPriority: e.value, }); } } function renderCustomItem(data) { return <div>{data}</div>; } export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import themes from 'devextreme/ui/themes'; import App from './App.js'; themes.initialized(() => { ReactDOM.render( <App />, document.getElementById('app'), ); });
<!DOCTYPE html> <html> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.1.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.1.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.js"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
.low .dx-radiobutton-checked .dx-radiobutton-icon .dx-radiobutton-icon-dot { background: gray; } .normal .dx-radiobutton-checked .dx-radiobutton-icon .dx-radiobutton-icon-dot { background: green; } .urgent .dx-radiobutton-checked .dx-radiobutton-icon .dx-radiobutton-icon-dot { background: orange; } .high .dx-radiobutton-checked .dx-radiobutton-icon .dx-radiobutton-icon-dot { background: red; } #radio-group-with-selection { margin-bottom: 10px; } #tasks-list { margin: 0 0 10px 10px; white-space: normal; } #list { margin: 10px 0 0 20px; padding-left: 0; text-align: left; }
export const priorities = ['Low', 'Normal', 'Urgent', 'High']; export const priorityEntities = [ { id: 0, text: 'Low' }, { id: 1, text: 'Normal' }, { id: 2, text: 'Urgent' }, { id: 3, text: 'High' }, ]; export const tasks = [{ id: 0, subject: 'Choose between PPO and HMO Health Plan', priority: 3, }, { id: 1, subject: 'Non-Compete Agreements', priority: 0, }, { id: 2, subject: 'Comment on Revenue Projections', priority: 1, }, { id: 3, subject: 'Sign Updated NDA', priority: 2, }, { id: 4, subject: 'Submit Questions Regarding New NDA', priority: 3, }, { id: 5, subject: 'Rollout of New Website and Marketing Brochures', priority: 3, }];
window.config = { transpiler: 'plugin-babel', meta: { 'devextreme/localization.js': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', }, defaultExtension: 'js', map: { 'react': 'npm:react@17.0.2/umd/react.development.js', 'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js', 'prop-types': 'npm:prop-types@15.8.1/prop-types.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@22.1.4/cjs', 'devextreme-react': 'npm:devextreme-react@22.1.4', 'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.5.16/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.63/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.32/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.7', 'inferno': 'npm:inferno@7.4.4/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat@7.4.11/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.11/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class@7.4.11/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras@7.4.11/dist/inferno-extras.min.js', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', }, packages: { 'devextreme': { defaultExtension: 'js', }, 'devextreme-react': { main: 'index.js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.7/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, react: true, }, }; System.config(window.config);