index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>qr generator</title> 
    <link rel="stylesheet" href="index.css">
</head>
<body>
    <div class="container">
        <p> Enter Your Text or URL</p>
        <input type="text" placeholder="Text or URL" id="qrText">
        <div id="imgBox">
            <img src="" id="qrImage">
        </div>
        <button onclick="generateQR()">Generate QR-scanner</button>
    </div>

    <script>
        let imgBox =document.getElementById("imgBox")
        let qrImage =document.getElementById("qrImage")
        let qrText =document.getElementById("qrText")


        function generateQR(){
qrImage.src="https://api.qrserver.com/v1/create-qr-code/?size=150x150&data="+qrText.value;
        }
    </script>

</body>
</html>