Use Range Selection for Calculation

Documentation

The RangeSelector component allows you to handle changes of the currently selected range. For this purpose, the callback function is specified in the onValueChanged property. Select the function’s call mode using the «Handle Range Changes» drop-down menu.

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Backend API

import React from 'react'; import RangeSelector, { Margin, Scale, MinorTick, Marker, Label, Behavior, SliderMarker, } from 'devextreme-react/range-selector'; import { SelectBox } from 'devextreme-react/select-box'; const startValue = new Date(2011, 0, 1); const endValue = new Date(2011, 11, 31); const behaviorModes = ['onHandleMove', 'onHandleRelease']; const valueChangeModeLabel = { 'aria-label': 'Value Change Mode' }; class App extends React.Component { constructor(props) { super(props); this.state = { workingDaysCount: calculateWorkdays([startValue, endValue]), behaviorMode: behaviorModes[0], }; this.processRange = this.processRange.bind(this); this.setBehavior = this.setBehavior.bind(this); } render() { return ( <div id="range-selector-demo"> <RangeSelector id="range-selector" title="Calculate the Working Days Count in a Date Period" onValueChanged={this.processRange} > <Margin top={50} /> <Scale startValue={startValue} endValue={endValue} minorTickInterval="day" tickInterval="month"> <MinorTick visible={false} /> <Marker visible={false} /> <Label format="MMM" /> </Scale> <Behavior valueChangeMode={this.state.behaviorMode} /> <SliderMarker format="dd EEEE" /> </RangeSelector> <h2>Working days count: { this.state.workingDaysCount }</h2> <div className="options"> <div className="caption">Options</div> <div className="option"> <span>Handle Range Changes </span> <SelectBox dataSource={behaviorModes} width={210} inputAttr={valueChangeModeLabel} value={this.state.behaviorMode} onValueChanged={this.setBehavior} /> </div> </div> </div> ); } processRange(e) { this.setState({ workingDaysCount: calculateWorkdays(e.value), }); } setBehavior(data) { this.setState({ behaviorMode: data.value, }); } } function calculateWorkdays([start, end]) { const currentDate = new Date(start); let workingDaysCount = 0; while (currentDate <= end) { if (currentDate.getDay() > 0 && currentDate.getDay() < 6) { workingDaysCount += 1; } currentDate.setDate(currentDate.getDate() + 1); } return workingDaysCount; } 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="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/23.1.5/css/dx.light.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.js"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>

#range-selector { height: 200px; } h2 { text-align: center; } .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); position: absolute; bottom: 0; left: 0; right: 0; } .option { margin-top: 10px; } .caption { font-size: 18px; font-weight: 500; } .option > span { margin-right: 10px; } .option > .dx-widget { display: inline-block; vertical-align: middle; }