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 NumberBox features used.
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Backend API
import React, { useCallback, useState } from 'react';
import { NumberBox, NumberBoxTypes } from 'devextreme-react/number-box';
const simpleLabel = { 'aria-label': 'Simple' };
const withSpinAndButtonsLabel = { 'aria-label': 'With Spin And Buttons' };
const disabledLabel = { 'aria-label': 'Disabled' };
const maxAndMinLabel = { 'aria-label': 'Min And Max' };
const salesLabel = { 'aria-label': 'Sales' };
const stockLabel = { 'aria-label': 'Stock' };
const keyDown = (e: NumberBoxTypes.KeyDownEvent) => {
const { event } = e;
const str = event.key;
if (/^[.,e]$/.test(str)) {
event.preventDefault();
}
};
function App() {
const [value, setValue] = useState(16);
const [max] = useState(30);
const valueChanged = useCallback((e: NumberBoxTypes.ValueChangedEvent) => {
setValue(e.value);
}, []);
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">
<NumberBox inputAttr={simpleLabel} />
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">With spin and clear buttons</div>
<div className="dx-field-value">
<NumberBox
defaultValue={20.5}
showSpinButtons={true}
showClearButton={true}
inputAttr={withSpinAndButtonsLabel}
/>
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">Disabled</div>
<div className="dx-field-value">
<NumberBox
defaultValue={20.5}
showSpinButtons={true}
showClearButton={true}
disabled={true}
inputAttr={disabledLabel}
/>
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">With max and min values</div>
<div className="dx-field-value">
<NumberBox
defaultValue={15}
min={10}
max={20}
showSpinButtons={true}
inputAttr={maxAndMinLabel}
/>
</div>
</div>
</div>
<div className="dx-fieldset">
<div className="dx-fieldset-header">Event Handling</div>
<div className="dx-field">
<div className="dx-field-label">This month sales</div>
<div className="dx-field-value">
<NumberBox
value={value}
max={max}
min={0}
showSpinButtons={true}
onKeyDown={keyDown}
onValueChanged={valueChanged}
inputAttr={salesLabel}
/>
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">Stock</div>
<div className="dx-field-value">
<NumberBox
min={0}
showSpinButtons={false}
readOnly={true}
value={max - value}
inputAttr={stockLabel}
/>
</div>
</div>
</div>
</div>
);
}
export default App;
import React, { useCallback, useState } from 'react';
import { NumberBox } from 'devextreme-react/number-box';
const simpleLabel = { 'aria-label': 'Simple' };
const withSpinAndButtonsLabel = { 'aria-label': 'With Spin And Buttons' };
const disabledLabel = { 'aria-label': 'Disabled' };
const maxAndMinLabel = { 'aria-label': 'Min And Max' };
const salesLabel = { 'aria-label': 'Sales' };
const stockLabel = { 'aria-label': 'Stock' };
const keyDown = (e) => {
const { event } = e;
const str = event.key;
if (/^[.,e]$/.test(str)) {
event.preventDefault();
}
};
function App() {
const [value, setValue] = useState(16);
const [max] = useState(30);
const valueChanged = useCallback((e) => {
setValue(e.value);
}, []);
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">
<NumberBox inputAttr={simpleLabel} />
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">With spin and clear buttons</div>
<div className="dx-field-value">
<NumberBox
defaultValue={20.5}
showSpinButtons={true}
showClearButton={true}
inputAttr={withSpinAndButtonsLabel}
/>
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">Disabled</div>
<div className="dx-field-value">
<NumberBox
defaultValue={20.5}
showSpinButtons={true}
showClearButton={true}
disabled={true}
inputAttr={disabledLabel}
/>
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">With max and min values</div>
<div className="dx-field-value">
<NumberBox
defaultValue={15}
min={10}
max={20}
showSpinButtons={true}
inputAttr={maxAndMinLabel}
/>
</div>
</div>
</div>
<div className="dx-fieldset">
<div className="dx-fieldset-header">Event Handling</div>
<div className="dx-field">
<div className="dx-field-label">This month sales</div>
<div className="dx-field-value">
<NumberBox
value={value}
max={max}
min={0}
showSpinButtons={true}
onKeyDown={keyDown}
onValueChanged={valueChanged}
inputAttr={salesLabel}
/>
</div>
</div>
<div className="dx-field">
<div className="dx-field-label">Stock</div>
<div className="dx-field-value">
<NumberBox
min={0}
showSpinButtons={false}
readOnly={true}
value={max - value}
inputAttr={stockLabel}
/>
</div>
</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'));
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,
},
'openai': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
'bundles:': '../../../../bundles/',
'externals:': '../../../../bundles/externals/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.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/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign',
'devextreme': 'npm:devextreme@link:../../packages/devextreme/artifacts/npm/devextreme/cjs',
'devextreme-react': 'npm:devextreme-react@link:../../packages/devextreme-react/npm/cjs',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.5/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.54/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/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@3.0.12/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'));
<!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/24.2.3/css/dx.light.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>
<link rel="stylesheet" type="text/css" href="styles.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
Specify the onValueChanged function to handle the value change. In this demo, the value of the "Stock" NumberBox depends on the "This month sales" NumberBox. Change the value in the "This month sales" NumberBox to see how it affects the other value.
If users should not interact with a NumberBox, set its disabled or readOnly property to true. The main difference between these properties is that users can submit a read-only NumberBox in an HTML form, while they cannot submit a disabled NumberBox.