index.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>QR Code Generator using HTML, CSS, and JavaScript</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="container">
        <p>Enter Text Or URL</p>
        <input type="text" placeholder="Text or URL" id="qrText">
        <div class="imgbox">
            <img src="" id="qrImg">
        </div>
        <button onclick="GenerateQR()">Generate QR Code</button>
    </div>

    <script>
        let imgbox = document.querySelector(".imgbox");
        let qrImg = document.getElementById("qrImg");
        let qrText = document.getElementById("qrText");

        function GenerateQR() {
            if (qrText.value.length > 0) {
                qrImg.src = "https://api.qrserver.com/v1/create-qr-code/?size=150x150&data=" + qrText.value;
                imgbox.style.display = "block"; // Show the image box
            } else {
                imgbox.style.display = "none"; // Hide the image box if there's no value
            }
        };
    </script>
</body>
</html>