Demos
Input(React)
Calendar
Validation

Calendar Valid Dates (React)

In some cases, not all dates in the range are valid. To handle these situations, the Calendar control has an itemValidator property. This sample uses this property to demonstrate a common use case. It prevents users from selecting dates on weekends and holidays.

Learn about Input Controls | Calendar Validation Documentation | Calendar API Reference

This example uses React.

JavaScript
Angular
Vue
React
app.jsx
index.html
app.css
data.jsx
Copy to CodeMine
import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import ReactDOM from 'react-dom/client';
import React, { useState } from 'react';
import useEvent from 'react-use-event-hook';
import * as wijmo from '@mescius/wijmo';
import * as wjInput from '@mescius/wijmo.react.input';
import './app.css';
import { holidays } from './data';
function App() {
    const [value, setValue] = useState();
    const initCalendar = useEvent((sender) => {
        setValue(sender.value);
    });
    const formatItem = useEvent((sender, e) => {
        // apply styles to weekends and holidays
        let weekday = e.data.getDay(), holiday = getHoliday(e.data);
        wijmo.toggleClass(e.item, 'date-weekend', weekday == 0 || weekday == 6);
        wijmo.toggleClass(e.item, 'date-holiday', holiday != null);
        e.item.title = holiday || '';
    });
    const validator = useEvent((date) => {
        return (date.getDay() % 6 != 0) && !getHoliday(date);
    });
    // gets the holiday for a given date
    const getHoliday = (date) => {
        let day = date.getDate(), month = date.getMonth() + 1, holiday = holidays[(month + '/' + day)];
        //
        if (!holiday) {
            let weekDay = date.getDay(), weekNum = Math.floor((day - 1) / 7) + 1;
            holiday = holidays[(month + '/' + weekNum + '/' + weekDay)];
        }
        //
        return holiday;
    };
    const formatDate = (time) => {
        if (time) {
            return wijmo.Globalize.format(time, 'D');
        }
    };
    const onValueChanged = useEvent((sender) => {
        setValue(sender.value);
    });
    return (<div className="container-fluid">
      <wjInput.Calendar initialized={initCalendar} formatItem={formatItem} itemValidator={validator} valueChanged={onValueChanged}>
      </wjInput.Calendar>
      <div>
        The current date is <b>{formatDate(value)}</b>.
      </div>
    </div>);
}
const container = document.getElementById('app');
if (container) {
    const root = ReactDOM.createRoot(container);
    root.render(<App />);
}
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useState } from 'react'; import useEvent from 'react-use-event-hook'; import * as wijmo from '@mescius/wijmo'; import * as wjInput from '@mescius/wijmo.react.input'; import './app.css'; import { holidays } from './data'; function App() { const [value, setValue] = useState(); const initCalendar = useEvent((sender) => { setValue(sender.value); }); const formatItem = useEvent((sender, e) => { // apply styles to weekends and holidays let weekday = e.data.getDay(), holiday = getHoliday(e.data); wijmo.toggleClass(e.item, 'date-weekend', weekday == 0 || weekday == 6); wijmo.toggleClass(e.item, 'date-holiday', holiday != null); e.item.title = holiday || ''; }); const validator = useEvent((date) => { return (date.getDay() % 6 != 0) && !getHoliday(date); }); // gets the holiday for a given date const getHoliday = (date) => { let day = date.getDate(), month = date.getMonth() + 1, holiday = holidays[(month + '/' + day)]; // if (!holiday) { let weekDay = date.getDay(), weekNum = Math.floor((day - 1) / 7) + 1; holiday = holidays[(month + '/' + weekNum + '/' + weekDay)]; } // return holiday; }; const formatDate = (time) => { if (time) { return wijmo.Globalize.format(time, 'D'); } }; const onValueChanged = useEvent((sender) => { setValue(sender.value); }); return (<div className="container-fluid"> <wjInput.Calendar initialized={initCalendar} formatItem={formatItem} itemValidator={validator} valueChanged={onValueChanged}> </wjInput.Calendar> <div> The current date is <b>{formatDate(value)}</b>. </div> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Calendar Validation</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.wj-calendar { display: inline-block; } .wj-calendar td { padding: 4px 6px 3px 6px; } .wj-calendar .wj-header { color: white; background: #808080; } .wj-calendar .date-holiday:not(.wj-state-selected) { font-weight: bold; color: #008f22; background: #f0fff0; outline: 2pt solid #008f22; } .wj-calendar .date-weekend:not(.wj-state-selected) { background-color: #d8ffa6; }
function getHolidays() { return { '1/1': 'New Year\'s Day', '6/14': 'Flag Day', '7/4': 'Independence Day', '11/11': 'Veteran\'s Day', '12/25': 'Christmas Day', '1/3/1': 'Martin Luther King\'s Birthday', '2/3/1': 'Washington\'s Birthday', '5/3/6': 'Armed Forces Day', '9/1/1': 'Labor Day', '10/2/1': 'Columbus Day', '11/4/4': 'Thanksgiving Day' // fourth Thursday in November }; } export const holidays = getHolidays();
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