You can make the TextBox as read-only by setting the readonly attribute to the input element.
ej.base.enableRipple(true);
// To get the all input fields and its container.
var inputElement = document.querySelectorAll('.e-input-group .e-input,.e-float-input.e-input-group input');
// Add 'e-input-focus' class to the input for achive ripple effect when focus on the input field.
for (var i = 0; i < inputElement.length; i++) {
inputElement[i].addEventListener('focus', function () {
var parentElement = this.parentNode;
if (parentElement.classList.contains('e-input-in-wrap')) {
parentElement.parentNode.classList.add('e-input-focus');
} else {
this.parentNode.classList.add('e-input-focus');
}
});
inputElement[i].addEventListener('blur', function () {
var parentElement = this.parentNode;
if (parentElement.classList.contains('e-input-in-wrap')) {
parentElement.parentNode.classList.remove('e-input-focus');
} else {
this.parentNode.classList.remove('e-input-focus');
}
});
}<!DOCTYPE html>
<html lang="en">
<head>
<title>Essential JS 2 TextBox</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 TextBox Components" />
<meta name="author" content="Syncfusion" />
<link href="index.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-base/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/21.1.35/ej2-inputs/styles/material.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'>
<div class='wrap'>
<div id="input-container">
<input class="e-input" type="text" placeholder="Enter Name" value="John" readonly/>
<div class="e-float-input">
<input type='text' required readonly value="John"/>
<span class="e-float-line"></span>
<label class="e-float-text e-label-top">Enter Name</label>
</div>
</div>
</div>
</div>
</body>
</html>