How to generate QR-code using JavaScript

Gen.html

<div>
    <input type="text" id="textToQR" />
    <button id="GenQR" onclick="makeCode();">Generate QR from text</button>
</div>
<br>
<div id="qrcode" style="width:160px; height:160px; margin-top:15px;"></div>

<script src="https://code.jquery.com/jquery-3.4.1.js"></script>
<script src="qrcode.min.js"></script>

<script>
var qrcode = new QRCode("qrcode");
function makeCode () {		
	var elText = $('#textToQR');
	
	if (!elText.val()) {
		alert("Input a text");
		elText.focus();
		return;
	}
	
	qrcode.makeCode(elText.val());
}
</script>