DevExtreme Accessibility Compliance
DevExtreme component libraries meet a variety of WCAG and Section 508 compliance standards. To assess this demo’s accessibility level, click the Run AXE® Validation button to launch the AXE® web accessibility evaluation tool.
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The overall accessibility level of your application depends on the Form features used.
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Backend API
import React, { useCallback, useState } from 'react';
import CheckBox, { CheckBoxTypes } from 'devextreme-react/check-box';
import SelectBox, { SelectBoxTypes } from 'devextreme-react/select-box';
import NumberBox, { NumberBoxTypes } from 'devextreme-react/number-box';
import Form, { FormTypes } from 'devextreme-react/form';
import service from './data.ts';
const labelModes = ['outside', 'static', 'floating', 'hidden'];
const labelLocations = ['left', 'top'];
const columnsCount = ['auto', 1, 2, 3];
const minColumnWidths = [150, 200, 300];
const widthLabel = { 'aria-label': 'Width' };
const companyLabel = { 'aria-label': 'Company' };
const labelModeLabel = { 'aria-label': 'Label Mode' };
const labelLocationLabel = { 'aria-label': 'Label Location' };
const columnCountLabel = { 'aria-label': 'Column Count' };
const minCountWidthLabel = { 'aria-label': 'Min Count Width' };
const App = () => {
const companies = service.getCompanies();
const [labelMode, setLabelMode] = useState<FormTypes.Properties['labelMode']>('floating');
const [labelLocation, setLabelLocation] = useState<FormTypes.Properties['labelLocation']>('left');
const [readOnly, setReadOnly] = useState(false);
const [showColon, setShowColon] = useState(true);
const [minColWidth, setMinColWidth] = useState(300);
const [colCount, setColCount] = useState(2);
const [company, setCompany] = useState(companies[0]);
const [width, setWidth] = useState();
const onCompanyChanged = useCallback((e: SelectBoxTypes.ValueChangedEvent) => {
setCompany(e.value);
}, [setCompany]);
const onLabelModeChanged = useCallback((e: SelectBoxTypes.ValueChangedEvent) => {
setLabelMode(e.value);
}, [setLabelMode]);
const onLabelLocationChanged = useCallback((e: SelectBoxTypes.ValueChangedEvent) => {
setLabelLocation(e.value);
}, [setLabelLocation]);
const onReadOnlyChanged = useCallback((e: CheckBoxTypes.ValueChangedEvent) => {
setReadOnly(e.value);
}, [setReadOnly]);
const onShowColonChanged = useCallback((e: CheckBoxTypes.ValueChangedEvent) => {
setShowColon(e.value);
}, [setShowColon]);
const onMinColWidthChanged = useCallback((e: SelectBoxTypes.ValueChangedEvent) => {
setMinColWidth(e.value);
}, [setMinColWidth]);
const onColumnsCountChanged = useCallback((e: SelectBoxTypes.ValueChangedEvent) => {
setColCount(e.value);
}, [setColCount]);
const onFormWidthChanged = useCallback((e: NumberBoxTypes.ValueChangedEvent) => {
setWidth(e.value);
}, [setWidth]);
const companySelectorLabelMode: SelectBoxTypes.Properties['labelMode'] = labelMode === 'outside'
? 'hidden'
: labelMode;
return (
<div id="form-demo">
<div className="widget-container">
{labelMode === 'outside' && (<div>Select company:</div>)}
<SelectBox
displayExpr="Name"
dataSource={companies}
inputAttr={companyLabel}
labelMode={companySelectorLabelMode}
label='Select company'
value={company}
onValueChanged={onCompanyChanged}
/>
<Form
id="form"
labelMode={labelMode}
formData={company}
readOnly={readOnly}
showColonAfterLabel={showColon}
labelLocation={labelLocation}
minColWidth={minColWidth}
colCount={colCount}
width={width}
/>
</div>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Label mode:</span>
<SelectBox
items={labelModes}
inputAttr={labelModeLabel}
value={labelMode}
onValueChanged={onLabelModeChanged}
/>
</div>
<div className="option">
<span>Label location:</span>
<SelectBox
items={labelLocations}
inputAttr={labelLocationLabel}
value={labelLocation}
onValueChanged={onLabelLocationChanged}
/>
</div>
<div className="option">
<span>Columns count:</span>
<SelectBox
items={columnsCount}
value={colCount}
inputAttr={columnCountLabel}
onValueChanged={onColumnsCountChanged}
/>
</div>
<div className="option">
<span>Min column width:</span>
<SelectBox
items={minColumnWidths}
value={minColWidth}
inputAttr={minCountWidthLabel}
onValueChanged={onMinColWidthChanged}
/>
</div>
<div className="option">
<span>Form width:</span>
<NumberBox
max={550}
value={width}
inputAttr={widthLabel}
onValueChanged={onFormWidthChanged}
/>
</div>
<div className="option">
<CheckBox
text="readOnly"
value={readOnly}
onValueChanged={onReadOnlyChanged}
/>
</div>
<div className="option">
<CheckBox
text="showColonAfterLabel"
value={showColon}
onValueChanged={onShowColonChanged}
/>
</div>
</div>
</div>
);
};
export default App;
import React, { useCallback, useState } from 'react';
import CheckBox from 'devextreme-react/check-box';
import SelectBox from 'devextreme-react/select-box';
import NumberBox from 'devextreme-react/number-box';
import Form from 'devextreme-react/form';
import service from './data.js';
const labelModes = ['outside', 'static', 'floating', 'hidden'];
const labelLocations = ['left', 'top'];
const columnsCount = ['auto', 1, 2, 3];
const minColumnWidths = [150, 200, 300];
const widthLabel = { 'aria-label': 'Width' };
const companyLabel = { 'aria-label': 'Company' };
const labelModeLabel = { 'aria-label': 'Label Mode' };
const labelLocationLabel = { 'aria-label': 'Label Location' };
const columnCountLabel = { 'aria-label': 'Column Count' };
const minCountWidthLabel = { 'aria-label': 'Min Count Width' };
const App = () => {
const companies = service.getCompanies();
const [labelMode, setLabelMode] = useState('floating');
const [labelLocation, setLabelLocation] = useState('left');
const [readOnly, setReadOnly] = useState(false);
const [showColon, setShowColon] = useState(true);
const [minColWidth, setMinColWidth] = useState(300);
const [colCount, setColCount] = useState(2);
const [company, setCompany] = useState(companies[0]);
const [width, setWidth] = useState();
const onCompanyChanged = useCallback(
(e) => {
setCompany(e.value);
},
[setCompany],
);
const onLabelModeChanged = useCallback(
(e) => {
setLabelMode(e.value);
},
[setLabelMode],
);
const onLabelLocationChanged = useCallback(
(e) => {
setLabelLocation(e.value);
},
[setLabelLocation],
);
const onReadOnlyChanged = useCallback(
(e) => {
setReadOnly(e.value);
},
[setReadOnly],
);
const onShowColonChanged = useCallback(
(e) => {
setShowColon(e.value);
},
[setShowColon],
);
const onMinColWidthChanged = useCallback(
(e) => {
setMinColWidth(e.value);
},
[setMinColWidth],
);
const onColumnsCountChanged = useCallback(
(e) => {
setColCount(e.value);
},
[setColCount],
);
const onFormWidthChanged = useCallback(
(e) => {
setWidth(e.value);
},
[setWidth],
);
const companySelectorLabelMode = labelMode === 'outside' ? 'hidden' : labelMode;
return (
<div id="form-demo">
<div className="widget-container">
{labelMode === 'outside' && <div>Select company:</div>}
<SelectBox
displayExpr="Name"
dataSource={companies}
inputAttr={companyLabel}
labelMode={companySelectorLabelMode}
label="Select company"
value={company}
onValueChanged={onCompanyChanged}
/>
<Form
id="form"
labelMode={labelMode}
formData={company}
readOnly={readOnly}
showColonAfterLabel={showColon}
labelLocation={labelLocation}
minColWidth={minColWidth}
colCount={colCount}
width={width}
/>
</div>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Label mode:</span>
<SelectBox
items={labelModes}
inputAttr={labelModeLabel}
value={labelMode}
onValueChanged={onLabelModeChanged}
/>
</div>
<div className="option">
<span>Label location:</span>
<SelectBox
items={labelLocations}
inputAttr={labelLocationLabel}
value={labelLocation}
onValueChanged={onLabelLocationChanged}
/>
</div>
<div className="option">
<span>Columns count:</span>
<SelectBox
items={columnsCount}
value={colCount}
inputAttr={columnCountLabel}
onValueChanged={onColumnsCountChanged}
/>
</div>
<div className="option">
<span>Min column width:</span>
<SelectBox
items={minColumnWidths}
value={minColWidth}
inputAttr={minCountWidthLabel}
onValueChanged={onMinColWidthChanged}
/>
</div>
<div className="option">
<span>Form width:</span>
<NumberBox
max={550}
value={width}
inputAttr={widthLabel}
onValueChanged={onFormWidthChanged}
/>
</div>
<div className="option">
<CheckBox
text="readOnly"
value={readOnly}
onValueChanged={onReadOnlyChanged}
/>
</div>
<div className="option">
<CheckBox
text="showColonAfterLabel"
value={showColon}
onValueChanged={onShowColonChanged}
/>
</div>
</div>
</div>
);
};
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
const companies = [{
ID: 1,
Name: 'Super Mart of the West',
Address: '702 SW 8th Street',
City: 'Bentonville',
State: 'Arkansas',
ZipCode: 72716,
Phone: '(800) 555-2797',
Fax: '(800) 555-2171',
Website: '',
Active: true,
}, {
ID: 2,
Name: 'Electronics Depot',
Address: '2455 Paces Ferry Road NW',
City: 'Atlanta',
State: 'Georgia',
ZipCode: 30339,
Phone: '(800) 595-3232',
Fax: '(800) 595-3231',
Website: '',
Active: true,
}, {
ID: 3,
Name: 'K&S Music',
Address: '1000 Nicllet Mall',
City: 'Minneapolis',
State: 'Minnesota',
ZipCode: 55403,
Phone: '(612) 304-6073',
Fax: '(612) 304-6074',
Website: '',
Active: true,
}, {
ID: 4,
Name: "Tom's Club",
Address: '999 Lake Drive',
City: 'Issaquah',
State: 'Washington',
ZipCode: 98027,
Phone: '(800) 955-2292',
Fax: '(800) 955-2293',
Website: '',
Active: true,
}];
export default {
getCompanies() {
return companies;
},
};
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
jsx: 'react',
},
meta: {
'react': {
'esModule': true,
},
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'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@24.1.7/cjs',
'devextreme-react': 'npm:devextreme-react@24.1.7/cjs',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.12/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13',
'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',
'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',
// 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@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/localization/messages': {
format: 'json',
defaultExtension: 'json',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.13/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
const companies = [
{
ID: 1,
Name: 'Super Mart of the West',
Address: '702 SW 8th Street',
City: 'Bentonville',
State: 'Arkansas',
ZipCode: 72716,
Phone: '(800) 555-2797',
Fax: '(800) 555-2171',
Website: '',
Active: true,
},
{
ID: 2,
Name: 'Electronics Depot',
Address: '2455 Paces Ferry Road NW',
City: 'Atlanta',
State: 'Georgia',
ZipCode: 30339,
Phone: '(800) 595-3232',
Fax: '(800) 595-3231',
Website: '',
Active: true,
},
{
ID: 3,
Name: 'K&S Music',
Address: '1000 Nicllet Mall',
City: 'Minneapolis',
State: 'Minnesota',
ZipCode: 55403,
Phone: '(612) 304-6073',
Fax: '(612) 304-6074',
Website: '',
Active: true,
},
{
ID: 4,
Name: "Tom's Club",
Address: '999 Lake Drive',
City: 'Issaquah',
State: 'Washington',
ZipCode: 98027,
Phone: '(800) 955-2292',
Fax: '(800) 955-2293',
Website: '',
Active: true,
},
];
export default {
getCompanies() {
return companies;
},
};
<!DOCTYPE html>
<html lang="en">
<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=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.7/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.6.12/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.tsx");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.widget-container {
margin-right: 320px;
padding: 20px;
max-width: 550px;
min-width: 300px;
}
#form {
margin-top: 25px;
}
.options {
padding: 20px;
position: absolute;
bottom: 0;
right: 0;
width: 260px;
top: 0;
background-color: rgba(191, 191, 191, 0.15);
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option {
margin-top: 10px;
}
You can use the editors on the right to modify the following properties:
-
labelMode: "outside" | "static" | "floating" | "hidden"
Specifies label display mode. -
labelLocation: "top" | "left" | "right"
Specifies whether to place outer labels above, to the left, or to the right of corresponding editors. The latter location is not demonstrated in this example. -
colCount
Specifies the number of columns in the layout. To build an adaptive layout where the column count depends on the container width, set this property's value to "auto". -
minColWidth
Specifies the minimum column width. Use this property when the colCount property's value is "auto". -
width
Specifies the Form component's width. -
readOnly
Makes the Form editors read-only. -
showColonAfterLabel
Specifies whether the Form displays a colon after a label.
To get started with the DevExtreme Form component, refer to the following tutorial for step-by-step instructions: Getting Started with Form.