You can enable weekNumbers in the Calendar by using the weekNumber property.
ej.base.enableRipple(true);
var calendar = new ej.calendars.Calendar({
weekNumber: true
});
calendar.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://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
<!--element which is going to render the Calendar-->
<div id="element"></div>
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</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;
}