17강 콘솔창에 값 입력 시 alert 표시가 안됩니다.

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17강 콘솔창에 값 입력 시 alert 표시가 안됩니다.
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17강 콘솔창에 값 입력 시 alert 표시가 안됩니다.
<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
        integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM"
        crossorigin="anonymous"></script>

    <title>스파르타코딩클럽 | 부트스트랩 연습하기</title>

    <link href="https://fonts.googleapis.com/css2?family=Gowun+Dodum&display=swap" rel="stylesheet">

    <style>
        * {
        font-family: 'Gowun Dodum', sans-serif;
    }
        .mytitle{
            background-color : green;
            height : 250px;
            width : 100%;

            background-image : linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://movie-phinf.pstatic.net/20210715_95/1626338192428gTnJl_JPEG/movie_image.jpg');
            background-position : center;
            background-size : cover;

            color : white;

            display : flex;
            flex-direction: column;
            justify-content : center;
            align-items : center;
        }
        .mytitle > button {
            width : 200px;
            height : 50px;
            background-color : transparent;
            color : white;
            border-radius : 50px;
            border : 1px solid white;
            margin-top : 10px;

        }
        .mytitle > button:hover {
            border : 3px solid white;
        }

        .mycomment{
        color : gray;
        }

        .wrap{
        max-width : 1200px;
        width : 95%;
        margin : 20px auto 0px auto;
        }

        .myposter{
        max-width : 500px;
        width : 95%;

        margin : 20px auto 0px auto;

        box-shadow : 0px 0px 3px 0px gray;

        padding : 20px;
        }
        .btn {
        margin : 10px auto 0px auto;

        display : flex;
        flex-direction: row;
        justify-content : center;
        align-items : center;
        }
        .btn > button {
            margin-right: 1px;
        }
    </style>
    <script>
        function sum(a,b){
            alert(a+b);
           }
    </script>
</head>

    <body>
        <div class="mytitle">
            <h1>내가 좋아하는 영화</h1>
            <button>영화 기록하기</button>

        </div>
        <div class="myposter">
            <div class="form-floating mb-3">
                <input type="email" class="form-control" id="floatingInput" placeholder="name@example.com">
                <label for="floatingInput">영화 URL</label>
            </div>

            <div class="input-group mb-3">
                <label class="input-group-text" for="inputGroupSelect01">별점</label>
                <select class="form-select" id="inputGroupSelect01">
                    <option selected>선택하기</option>
                    <option value="1">⭐</option>
                    <option value="2">⭐⭐</option>
                    <option value="3">⭐⭐⭐</option>
                    <option value="3">⭐⭐⭐⭐</option>
                    <option value="3">⭐⭐⭐⭐⭐</option>
                </select>

            </div>
            <div class="form-floating">
                <textarea class="form-control" placeholder="Leave a comment here" id="floatingTextarea2"
                          style="height: 100px"></textarea>
                <label for="floatingTextarea2">Comments</label>
            </div>
            <div class="btn">
                <button type="button" class="btn btn-dark">기록하기</button>
                <button type="button" class="btn btn-outline-dark">닫기</button>
            </div>

        </div>



        <div class="wrap">
            <div class="row row-cols-1 row-cols-md-4 g-4">
                <div class="col">
                    <div class="card">
                        <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
                             class="card-img-top" alt="...">
                        <div class="card-body">
                            <h5 class="card-title">영화제목</h5>
                            <p class="card-text">영화 내용 blah~~ </p>
                            <p> ⭐⭐⭐ </p>
                            <p class="mycomment"> 영화 핵노잼 </p>
                        </div>
                    </div>
                </div>
                <div class="col">
                    <div class="card">
                        <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
                             class="card-img-top" alt="...">
                        <div class="card-body">
                            <h5 class="card-title">영화제목</h5>
                            <p class="card-text">영화 내용 blah~~ </p>
                            <p> ⭐⭐⭐ </p>
                            <p class="mycomment"> 영화 핵노잼 </p>
                        </div>
                    </div>
                </div>
                <div class="col">
                    <div class="card">
                        <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
                             class="card-img-top" alt="...">
                        <div class="card-body">
                            <h5 class="card-title">영화제목</h5>
                            <p class="card-text">영화 내용 blah~~ </p>
                            <p> ⭐⭐⭐ </p>
                            <p class="mycomment"> 영화 핵노잼 </p>
                        </div>
                    </div>
                </div>
                <div class="col">
                    <div class="card">
                        <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
                             class="card-img-top" alt="...">
                        <div class="card-body">
                            <h5 class="card-title">영화제목</h5>
                            <p class="card-text">영화 내용 blah~~ </p>
                            <p> ⭐⭐⭐ </p>
                            <p class="mycomment"> 영화 핵노잼 </p>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </body>

</html>
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