웹프로그래밍 CSS3/CSS3 박스속성

border

별초롱언니 2025. 3. 13. 17:29

▣ border 속성

· border : 요소의 테두리선을 지정 

속성값 의미 기본값
border-width 선의 두께(너비) midium
border-style 선의 종류 none
border-color 선의 색상 black 
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    div {
      width: 100px;
      height: 100px;
      background-color: lightgreen;
      border: solid pink;
      border-width: 10px 20px 30px 40px;
    }
  </style>
</head>
<body>
  <div>border-width</div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
<style>
  div {
    width: 100px;
    height: 100px;
    background-color: yellow;
    border-width: 10px 20px 30px 40px;
    border-color: pink;
    border-style: solid dotted double inset;
  }
</style>
</head>
<body>
  <div> border-style </div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    div {
      width: 100px;
      height: 100px;
      background-color: yellow;
      border: 1px solid red;
    }
  </style>
</head>
<body>
  <div> border-style </div>
</body>
</html>

▣ box-sizing

· 요소의 크기 계산 기준을 지정

속성값 의미
content-box 너비 (width, height)만으로 요소의 크기를 계산
border-box 너비 (width, height)에 안쪽 여백(padding)과 테두리 선(border)를 포함하여 요소의 크기를 계산 
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>border</title>

  <style>
    * {
      margin: 0;
      padding: 0;
    }
    .box {
      width: 200px;
      height: 200px;
      background-color: yellow;
      padding: 40px;
      border: 10px solid red;
      box-sizing: border-box;
    }
  </style>
  
</head>

<body>
  <div class="box">content</div>
</body>
</html>