Overview
Documentation
The NumberBox is a UI component that displays a numeric value and allows a user to modify it by typing in a value, and incrementing or decrementing it using the keyboard or mouse.
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import React from 'react';
import { NumberBox } from 'devextreme-react/number-box';
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
max: 30,
value: 16
};
this.valueChanged = this.valueChanged.bind(this);
this.keyDown = this.keyDown.bind(this);
}
valueChanged(e) {
this.setState({
value: e.value
});
}
keyDown(e) {
const event = e.event;
const str = event.key || String.fromCharCode(event.which);
if(/^[.,e]$/.test(str)) {
event.preventDefault();
}
}
render() {
let { value, max } = this.state;
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 />
</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}
/>
</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}
/>
</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}
/>
</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={this.keyDown}
onValueChanged={this.valueChanged}
/>
</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 }
/>
</div>
</div>
</div>
</div>
);
}
}
export default App;
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="https://cdn3.devexpress.com/jslib/20.2.7/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.7/css/dx.light.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>
<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>
System.config({
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16.14.0/umd/react.development.js',
'react-dom': 'npm:react-dom@16.14.0/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.7.2/prop-types.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.26.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.7',
'devextreme-react': 'npm:devextreme-react@20.2.7',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.23/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.29/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.13/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.13/hooks/dist/hooks.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'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});