
* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.
* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.
영상대로 따라하고 있는데.. 왜 그런지 잘 모르겠습니다

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>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<title>My Album</title>
<style>
@import url('https://fonts.googleapis.com/css2?family=Gowun+Dodum&display=swap');
* {
font-family: 'Gowun Dodum', sans-serif;
}
.mytitle {
background-color: green;
color: white;
height: 250px;
/* 내용물을 정렬 */
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
background-image: linear-gradient(0deg, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2)), url('https://images.unsplash.com/photo-1511992243105-2992b3fd0410?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1470&q=80');
background-position: center;
background-size: cover;
}
.mytitle > button {
width: 150px;
height: 50px;
background-color: transparent;
border: none;
color: white;
font-size: 18px;
font-weight: bold;
border-radius: 5px;
border: 1px solid white;
margin-top: 20px;
}
.mycards {
margin: 20px auto 20px auto;
width: 1200px;
}
.mypostbox {
width: 500px;
margin: 20px auto 20px auto;
padding: 20px 20px 20px 20px;
border-radius: 5px;
box-shadow: 0px 0px 3px 0px blue;
}
.mybtn {
display: flex;
flex-direction: row;
align-items: center;
justify-content: center;
margin-top: 10px;
}
.mybtn>button {
margin-right: 10px;
}
</style>
<script>
function openclose() {
$('#postingbox').toggle();
}
function makeCard(){
alert(image);
let image = $('#image').val();
let title = $('#title').val();
let content = $('#content').val();
let date = $('#date').val();
let temp_html = `
<div class="col">
<div class="card h-100">
class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">앨범 제목</h5>
<p class="card-text">앨범 내용</p>
</div>
<div class="card-footer">
<small class="text-muted">앨범 날짜</small>
</div>
</div>
</div>`;
$('#card').append(temp_html)
}
</script>
</head>
<body>
<div class="mytitle">
<h1>나만의 추억 앨범</h1>
<button>추억 저장하기</button>
</div>
<div class="mypostingbox" id="postingbox">
<div class="form-floating mb-3">
<input type="email" class="form-control" id="image" placeholder="name@example.com">
<label for="floatingInput">앨범 이미지</label>
</div>
<div class="form-floating mb-3">
<input type="email" class="form-control" id="title" placeholder="name@example.com">
<label for="floatingInput">앨범 제목</label>
</div>
<div class="form-floating mb-3">
<input type="email" class="form-control" id="content" placeholder="name@example.com">
<label for="floatingInput">앨범 날짜</label>
</div>
<div class="form-floating">
<textarea class="form-control" placeholder="Leave a comment here" id="floatingTextarea"></textarea>
<label for="floatingTextarea">앨범 내용</label>
</div>
<div class="mybtn">
<button onclick="makeCard()" type="button" class="btn btn-primary">기록하기</button>
<button type="button" class="btn btn-outline-primary">닫기</button>
</div>
</div>
<div class="mycards">
<div id="card" class="row row-cols-1 row-cols-md-4 g-4">
<div class="col">
<div class="card h-100">
class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">앨범 제목</h5>
<p class="card-text">앨범 내용</p>
</div>
<div class="card-footer">
<small class="text-muted">앨범 날짜</small>
</div>
</div>
</div>
<div class="col">
<div class="card h-100">
class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">앨범 제목</h5>
<p class="card-text">앨범 내용</p>
</div>
<div class="card-footer">
<small class="text-muted">앨범 날짜</small>
</div>
</div>
</div>
<div class="col">
<div class="card h-100">
class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">앨범 제목</h5>
<p class="card-text">앨범 내용</p>
</div>
<div class="card-footer">
<small class="text-muted">앨범 날짜</small>
</div>
</div>
</div>
<div class="col">
<div class="card h-100">
class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">앨범 제목</h5>
<p class="card-text">앨범 내용</p>
</div>
<div class="card-footer">
<small class="text-muted">앨범 날짜</small>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
