... 헤드에
<style>
.btn {
cursor: pointer;
border: 1px solid black;
border-radius: 4px;
padding: 6px 20px;
text-align: center;
background: #fff;
color: black;
font-weight: bold;
}
.btn-accept {
cursor: pointer;
border: none;
border-radius: 4px;
padding: 6px 20px;
text-align: center;
background: dodgerblue;
color: #fff;
font-weight: bold;
}
...
.btn-cancel {
border: none;
background: red;
color: white;
}
... 바디에
<button class="btn">기본 버튼</button> 
<button class="btn-accept">수락</button>
<button class="btn btn-cancel">취소</button>
부트스트랩
<!DOCTYPE html>
<html>
<head>
     <style>
     </style>
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
</head>
<body>
     <button type="button" class="btn btn-primary">Primary</button>
     <button type="button" class="btn btn-secondary">Secondary</button>
     <button type="button" class="btn btn-success">Success</button>
     <button type="button" class="btn btn-danger">Danger</button>
     <button type="button" class="btn btn-warning">Warning</button>
     <a class="btn btn-primary" href="#" role="button">Link</a>
     <button class="btn btn-success" type="submit">Button</button>
     <input class="btn btn-danger" type="button" value="Input">
     <button type="button" class="btn btn-outline-primary">Primary</button>
     <button type="button" class="btn btn-outline-secondary">Secondary</button>
     <button type="button" class="btn btn-outline-success">Success</button>
     <button type="button" class="btn btn-outline-danger">Danger</button>
     
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js" integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf" crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js" integrity="sha384-SR1sx49pcuLnqZUnnPwx6FCym0wLsk5JZuNx2bPPENzswTNFaQU1RDvt3wT4gWFG" crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.min.js" integrity="sha384-j0CNLUeiqtyaRmlzUHCPZ+Gy5fQu0dQ6eZ/xAww941Ai1SxSY+0EQqNXNE6DZiVc" crossorigin="anonymous"></script>
</body>
</html>
HTML
복사
<!DOCTYPE html>
<html>
<head>
     <style>
     </style>
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet"
          integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
</head>
<body>
     <form>
          <div class="mb-3">
               <label for="exampleInputEmail1" class="form-label">Email address</label>
               <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
               <div id="emailHelp" class="form-text">We'll never share your email with anyone else.</div>
          </div>
          <div class="mb-3">
               <label for="exampleInputPassword1" class="form-label">Password</label>
               <input type="password" class="form-control" id="exampleInputPassword1">
          </div>
          <div class="mb-3 form-check">
               <input type="checkbox" class="form-check-input" id="exampleCheck1">
               <label class="form-check-label" for="exampleCheck1">Check me out</label>
          </div>
          <button type="submit" class="btn btn-primary">Submit</button>
     </form>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js"
          integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf"
          crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js"
          integrity="sha384-SR1sx49pcuLnqZUnnPwx6FCym0wLsk5JZuNx2bPPENzswTNFaQU1RDvt3wT4gWFG"
          crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.min.js"
          integrity="sha384-j0CNLUeiqtyaRmlzUHCPZ+Gy5fQu0dQ6eZ/xAww941Ai1SxSY+0EQqNXNE6DZiVc"
          crossorigin="anonymous"></script>
</body>
</html>
HTML
복사
<!DOCTYPE html>
<html>
<head>
     <style>
     </style>
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet"
          integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
</head>
<body>
     <nav class="navbar navbar-expand-lg navbar-light bg-light">
          <div class="container-fluid">
            <a class="navbar-brand" href="#">Navbar</a>
            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
              <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarSupportedContent">
              <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                <li class="nav-item">
                  <a class="nav-link active" aria-current="page" href="#">Home</a>
                </li>
                <li class="nav-item">
                  <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item dropdown">
                  <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                    Dropdown
                  </a>
                  <ul class="dropdown-menu" aria-labelledby="navbarDropdown">
                    <li><a class="dropdown-item" href="#">Action</a></li>
                    <li><a class="dropdown-item" href="#">Another action</a></li>
                    <li><hr class="dropdown-divider"></li>
                    <li><a class="dropdown-item" href="#">Something else here</a></li>
                  </ul>
                </li>
                <li class="nav-item">
                  <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
                </li>
              </ul>
              <form class="d-flex">
                <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
                <button class="btn btn-outline-success" type="submit">Search</button>
              </form>
            </div>
          </div>
        </nav>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js"
          integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf"
          crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js"
          integrity="sha384-SR1sx49pcuLnqZUnnPwx6FCym0wLsk5JZuNx2bPPENzswTNFaQU1RDvt3wT4gWFG"
          crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.min.js"
          integrity="sha384-j0CNLUeiqtyaRmlzUHCPZ+Gy5fQu0dQ6eZ/xAww941Ai1SxSY+0EQqNXNE6DZiVc"
          crossorigin="anonymous"></script>
</body>
</html>
HTML
복사
.container / .row / .col 
<!DOCTYPE html>
<html>
<head>
  <style>
       div.col{
          background-color: skyblue;
          border-radius: 4px;
          border: 1px solid pink;
       }
  </style>
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet"
    integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
</head>
<body>
  <div class="container">
    <div class="row">
      <div class="col">
        1 of 2
      </div>
      <div class="col">
        2 of 2
      </div>
    </div>
    <div class="row">
      <div class="col">
        1 of 3
      </div>
      <div class="col">
        2 of 3
      </div>
      <div class="col">
        3 of 3
      </div>
    </div>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js"
    integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf"
    crossorigin="anonymous"></script>
  <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js"
    integrity="sha384-SR1sx49pcuLnqZUnnPwx6FCym0wLsk5JZuNx2bPPENzswTNFaQU1RDvt3wT4gWFG"
    crossorigin="anonymous"></script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.min.js"
    integrity="sha384-j0CNLUeiqtyaRmlzUHCPZ+Gy5fQu0dQ6eZ/xAww941Ai1SxSY+0EQqNXNE6DZiVc"
    crossorigin="anonymous"></script>
</body>
</html>
HTML
복사
부트스트랩보다 상위 우선 순위
•
!important
•
#id
•
div.class
.class → 부트스트랩의 스타일 적용 방식
.col-1 : 1개 만큼의 너비
부트스트랩 장점 : 반응형 웹 적용
.col-lg-4 → lg : 기준이 되는 화면의 사이즈 / 4 : 12등분 중 차지할 비율
<!DOCTYPE html>
<html>
<head>
     <style>
          div.col {
               background-color: skyblue;
               border-radius: 4px;
               border: 1px solid pink;
          }
     </style>
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet"
          integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
</head>
<body>
     <div class="container">
          <div class="row">
               <div class="col-6 col-sm-9 bg-success">col-6 col-sm-9</div>
               <div class="col-6 col-sm-3 bg-warning">col-6 col-sm-3</div>
          </div>
     </div>
     <div class="container">
          <div class="row">
               <div class="col-7 col-lg-8 bg-success">col-7 col-lg-8</div>
               <div class="col-5 col-lg-4 bg-warning">col-5 col-lg-4</div>
          </div>
     </div>
     <div class="container">
          <div class="row">
               <div class="col-sm-3 col-md-6 col-lg-4 bg-success">col-sm-3 col-md-6 col-lg-4</div>
               <div class="col-sm-9 col-md-6 col-lg-8 bg-warning">col-sm-9 col-md-6 col-lg-8</div>
          </div>
     </div>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js"
          integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf"
          crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js"
          integrity="sha384-SR1sx49pcuLnqZUnnPwx6FCym0wLsk5JZuNx2bPPENzswTNFaQU1RDvt3wT4gWFG"
          crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.min.js"
          integrity="sha384-j0CNLUeiqtyaRmlzUHCPZ+Gy5fQu0dQ6eZ/xAww941Ai1SxSY+0EQqNXNE6DZiVc"
          crossorigin="anonymous"></script>
</body>
</html>
HTML
복사




