index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./styles/stlyes.css">
    <title>QRCODE</title>
</head>

<body>
    <div class="container">
        <div class="buscador">
            <img id="logo" src="./images/logo-qr-generator.svg" alt="Logo QRCode">
            <form class="form">
                <input id="url" type="text" name="url" placeholder="Enter an URL" />
                <button id="boton">QR Code</button>
            </form>
        </div>
    </div>

    <script>
        var button = document.getElementById("boton")
        button.addEventListener("click", handleUrl)

        function handleUrl(e) {
            const input = document.querySelector("#url")
            if (input.value != "") {
                sessionStorage.setItem("url",input.value)
                window.location.replace("qrpage.html");
                e.preventDefault()
            }
        }

    </script>
</body>

</html>