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* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.

* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.


  <script> function open_box(){ $('#post-box').show() } function close_box(){ $('#post-box').hide() } </script>

이 부분이 실행되야 하는데 안됩니다 ㅜㅜ 버튼이 닫히고 열리고 왜 안되는걸까요..?






작성한 코드 및 에러 메세지

<!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;
}
    .my{
        color: white;

        background-color: antiquewhite;
        width: auto;
        height: 300px;
        text-align: center;

        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-size: cover;
        background-position: center;

        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;

 }
    .my > button:hover {
        border: 1px solid white;
    }

    .card{

        margin-top: 30px;
        color: gray;
    }

    .boxs {
        display: flex;
    }

    .wrap{
        width: 1200px;
        margin: auto;
    }

    .home {
        width: 500px;
        margin: 20px auto 0px;

        box-shadow: 0px 0px 3px 0px;
        padding: 20px;
    }

        .mybtns > button {
            margin-right: 10px;
        }
</style>

<script>
function open_box(){
    $('#post-box'').show()
  }
function close_box(){
    $('#post-box').hide()
  }
</script>


</head>

<body>
<div class = "my">
        <h1>내 생애 최고의 영화들</h1>
       <button onclick="open_box()">영화 기록하기</button>
</div>

<div class = "home">

    <div class="form-floating mb-3">
        <input type="email" class="form-control" id="floatingInput" placeholder="">
        <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>
        </select>
    </div>

        <P>
            <textarea class="form-control" placeholder="코멘트" id="floatingTextarea"></textarea>
        </P>


<div class="mybtns">
<button type="button" class="btn btn-dark">기록하기</button>
<button onclick="close_box()" type="button" class="btn btn-outline-dark">닫기</button>
</div>

</div>
</div>
 </div>
</select>
</div>

</div>

<div class = "wrap"
    <div class = "boxs">
        <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">영화에 대한 설명이 들어가용</p>
                        <p>⭐⭐⭐</p>
                        <p>여기는 코멘트에용</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">영화에 대한 설명이 들어가용</p>
                        <p>⭐⭐⭐</p>
                        <p>여기는 코멘트에용</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">영화에 대한 설명이 들어가용</p>
                        <p>⭐⭐⭐</p>
                        <p>여기는 코멘트에용</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">영화에 대한 설명이 들어가용</p>
                        <p>⭐⭐⭐</p>
                        <p>여기는 코멘트에용</p>
                    </div>
                </div>
            </div>
    </div>
    </div>
</div>

</body>

</html>




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