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Customize Item

You can use the items[] array to configure all form items. This array can contain strings (formData field names) and objects (item configurations).

Use a string to create a simple item with default configuration as shown for the Email item.

To change the default settings, declare an item configuration object. Use the dataField property to bind an item to a field in the formData object. Use the editorType property to specify an item's data editor or configure the editor in the editorOptions object. You can also specify any other properties described in the SimpleItem section.

To customize item labels, use the label.template property. The demo uses this property to add icons to the labels. Refer to the Additional Notes item's implementation for instructions on how to add an icon with a tooltip to the label.

This demo shows how to specify editorOptions, editorType, validationRules, and colSpan properties for simple items in a Form component.

Backend API
import React from 'react'; import 'devextreme-react/text-area'; import Form, { Item, GroupItem, Label } from 'devextreme-react/form'; import LabelTemplate from './LabelTemplate.js'; import LabelNotesTemplate from './LabelNotesTemplate.js'; import service from './data.js'; const employee = service.getEmployee(); const validationRules = { position: [ { type: 'required', message: 'Position is required.' }, ], hireDate: [ { type: 'required', message: 'Hire Date is required.' }, ], }; const nameEditorOptions = { disabled: true }; const positionEditorOptions = { items: service.getPositions(), searchEnabled: true, value: '' }; const hireDateEditorOptions = { width: '100%', value: null }; const birthDateEditorOptions = { width: '100%', disabled: true }; const notesEditorOptions = { height: 90, maxLength: 200 }; const phoneEditorOptions = { mask: '+1 (X00) 000-0000', maskRules: { X: /[02-9]/ } }; export default function App() { const validateForm = React.useCallback((e) => { e.component.validate(); }, []); return ( <Form onContentReady={validateForm} formData={employee}> <GroupItem colCount={2} caption="Employee Details"> <Item dataField="FirstName" editorOptions={nameEditorOptions}> <Label render={LabelTemplate('user')} /> </Item> <Item dataField="Position" editorType="dxSelectBox" editorOptions={positionEditorOptions} validationRules={validationRules.position}> <Label render={LabelTemplate('info')} /> </Item> <Item dataField="LastName" editorOptions={nameEditorOptions}> <Label render={LabelTemplate('user')} /> </Item> <Item dataField="HireDate" editorType="dxDateBox" editorOptions={hireDateEditorOptions} validationRules={validationRules.hireDate}> <Label render={LabelTemplate('event')} /> </Item> <Item dataField="BirthDate" editorType="dxDateBox" editorOptions={birthDateEditorOptions}> <Label render={LabelTemplate('event')} /> </Item> <Item dataField="Address"> <Label render={LabelTemplate('home')} /> </Item> <Item dataField="Notes" colSpan={2} editorType="dxTextArea" editorOptions={notesEditorOptions}> <Label render={LabelNotesTemplate} /> </Item> <Item dataField="Phone" editorOptions={phoneEditorOptions}> <Label render={LabelTemplate('tel')} /> </Item> <Item dataField="Email"> <Label render={LabelTemplate('email')} /> </Item> </GroupItem> </Form> ); }
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; 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="" /> <link rel="stylesheet" type="text/css" href="" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src=""></script> <script src=""></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>
#helpedInfo { color: #42a5f5; } #tooltip-content { font-size: 14px; font-weight: bold; } #template-content { display: inline-flex; }
import React from 'react'; import { Tooltip } from 'devextreme-react/tooltip'; function LabelNotesTemplate(data) { return ( <React.Fragment> <div id="template-content"> <i id="helpedInfo" className="dx-icon dx-icon-info"></i> Additional <br /> { data.text } </div> <Tooltip target="#helpedInfo" showEvent="mouseenter" hideEvent="mouseleave" > <div id="tooltip-content">This field must not exceed 200 characters</div> </Tooltip> </React.Fragment> ); } export default LabelNotesTemplate;
import React from 'react'; export default function LabelTemplate(iconName) { return function template(data) { return (<div><i className={`dx-icon dx-icon-${iconName}`}></i>{ data.text }</div>); }; }
const employee = { ID: 1, FirstName: 'John', LastName: 'Heart', Position: 'CEO', BirthDate: '1964/03/16', HireDate: '1995/01/15', Notes: 'John has been in the Audio/Video industry since 1990. He has led DevAv as its CEO since 2003.\r\n\r\nWhen not working hard as the CEO, John loves to golf and bowl. He once bowled a perfect game of 300.', Address: '351 S Hill St., Los Angeles, CA', Phone: '360-684-1334', Email: '', }; const positions = [ 'HR Manager', 'IT Manager', 'CEO', 'Controller', 'Sales Manager', 'Support Manager', 'Shipping Manager', ]; export default { getEmployee() { return employee; }, getPositions() { return positions; }, };
window.exports = window.exports || {}; window.config = { transpiler: 'plugin-babel', meta: { 'devextreme/localization.js': { 'esModule': true, }, }, paths: { 'npm:': '', }, 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@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@23.1.6/cjs', 'devextreme-react': 'npm:devextreme-react@23.1.6', 'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.6.2/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.2/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.49/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/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/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/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', // Prettier 'prettier/standalone': 'npm:prettier@2.8.4/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.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@3.0.12/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, react: true, }, }; System.config(window.config);