You can enable weekNumbers in the Calendar by using the weekNumber property.
import { Calendar } from '@syncfusion/ej2-calendars';
//creates a calendar with weekNumber enabled
let calendarObject: Calendar = new Calendar({
//sets the weekNumber
weekNumber: true
});
calendarObject.appendTo('#element');<!DOCTYPE html>
<html lang="en">
<head>
<title>Essential JS 2 Calendar control</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Typescript UI Controls" />
<meta name="author" content="Syncfusion" />
<!--style reference from the Calendar component-->
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-base/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-buttons/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-calendars/styles/material.css" rel="stylesheet" />
<!--style reference from app-->
<link href="styles.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
</head>
<body>
<div id='loader'>LOADING....</div>
<div id='container'>
<!--element which is going to render the Calendar-->
<div id='element'></div>
</div>
</body>
</html>/* Example - styles */
#container {
visibility: hidden;
max-width: 250px;
margin: 0 auto;
}
#loader {
color: #008cff;
height: 40px;
width: 30%;
position: absolute;
top: 45%;
left: 45%;
}
#element {
display: block;
}