inputBuku

<!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>Input Buku</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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    <style type="text/css">
        .label{
            display: block;
            font-size: small;
            margin-top: 5px;
        }.error{font-size: small;color:rgb(255, 0, 0);}

		body{

				width: fit-content;
                text-align: center;
				margin: auto;
                background-image: url(fang-wei-lin-H1IRUS1vEFA-unsplash.jpg);
                background-size: cover;
                background-position: center;
                background-repeat: no-repeat;
			}

        .content{
            position: relative;

            width: 510px;
            height: fit-content;

            margin: auto;
            margin-top: 15%;
            background: #FFFFFF;
            border: 1px solid #ffffff;
            box-shadow: 10px 10px 10px rgba(47, 47, 47, 0.25);
            border-radius: 40px;
            filter: opacity(90%);
        }
    </style>
</head>
<body>
        <div class="content">

            <h1>Form Buku Baru </h1>
            <br>
            <p>Judul Buku Baru</p>
            <input type="text" id = "txtbukubaru" />
            <p>Daftar Judul Buku </p>
            <select name="daftarbook" id="semuabuku" >
                <option value="">Pilih Judul</option>
            </select>
            <p style="padding-top: 3%;">
                <input type="button" id="btntambah" value="Tambah Buku" >
            </p>

            <script>
                $('#btntambah').click(function(){

                    var bukubaru = $('#txtbukubaru').val();

                    $('#semuabuku').append(new Option(bukubaru, bukubaru));


                })
                </script>
        </div>
</body>
</html>