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726 flex布局：flex-direction，flex-wrap，justify-content，align-item，align-content，- flex-grow，flex-shrink，flex-basis，flex
2022-09-06 22:55:54

認(rèn)識(shí)flexbox

原先的布局存在的痛點(diǎn)

flex布局的出現(xiàn)

flex布局的重要概念

flex布局的模型

flex相關(guān)的屬性

flex-direction

flex-wrap

flex-flow

justify-content

align-item

align-content

flex-item屬性 - order

flex-item屬性 - flex items

flex-item屬性 - flex-grow

flex-item屬性 - flex-shrink

flex-item屬性 - flex-basis

flex-item屬性 - flex屬性

思考: 如下布局如何解決對(duì)其問題

01_重要概念-flex-container-item.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .box {
      /* flex: 塊級(jí)盒子的flex-container */
      /* inline-flex: 了解, 行內(nèi)級(jí)盒子的flex-container */
      display: flex;
      background-color: #f00;
    }
  </style>
</head>
<body>
  
  <!-- aaaa -->
  <div class="box">
    <div class="item">1</div>
    <div class="item">2</div>
    <div class="item">3</div>
  </div>
  <!-- bbb -->

</body>
</html>

02_flex模型-各種概念.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .box {
      display: flex;
      background-color: #f00;

      flex-wrap: wrap;

      width: 200px;
      height: 200px;
    }

    .item {
      width: 60px;
      height: 60px;
      background-color: orange;
    }
  </style>
</head>
<body>
  
  <!-- aaaa -->
  <div class="box">
    <div class="item">1</div>
    <div class="item">2</div>
    <div class="item">3</div>
    <div class="item">4</div>
    <div class="item">5</div>
    <div class="item">4</div>
    <div class="item">5</div>
    <div class="item">4</div>
    <div class="item">5</div>
  </div>
  <!-- bbb -->

</body>
</html>

03-container-flex-direction.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;

      /* 修改主軸的方向 */
      /* row-reverse: row的反轉(zhuǎn) */
      /* column: 列變成主軸的方向 */
      /* column-reverse: 列主軸進(jìn)行反轉(zhuǎn) */
      /* flex-direction: column-reverse; */
    }

    .item {
      width: 120px;
      height: 120px;

      background-color: #f00;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

04-container-flex-wrap.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;

      /* nowrap: 默認(rèn)值不換行 */
      /* flex-wrap: wrap; */
      /* flex-flow: wrap; */
      flex-flow: row-reverse wrap;
    }

    .item {
      width: 120px;
      height: 120px;

      background-color: #f00;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

05-container-flex-flow練習(xí).html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;

      /* flex-direction: row-reverse;
      flex-wrap: wrap-reverse; */
      flex-flow: row-reverse wrap-reverse;
    }

    .item {
      width: 120px;
      height: 120px;

      background-color: #f00;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

06-container-justify-content.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;
      /* padding: 0 10px; */
      box-sizing: border-box;

      display: flex;

      flex-wrap: wrap;

      /* 切換justify-content */
      /* flex-end: 讓元素和main end對(duì)齊 */
      /* center: 居中對(duì)齊 */
      /* space-between: 兩端個(gè)放一個(gè)元素, 其他多余的元素一定要空間等分 */
      /* space-evenly: 兩端也有間距, 并且所有的空間進(jìn)行等分 */
      /* space-around: 兩端也有間距, 兩端的間距是items之間的間距一半 */
      justify-content: space-between;
    }

    .item {
      width: 120px;
      height: 120px;

      background-color: #f00;

      /* margin-left: 20px; */
      /* margin: 0 20px; */
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
    <div class="item item4">4</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

07-container-align-items.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;
      /* padding: 0 10px; */
      box-sizing: border-box;

      display: flex;

      align-items: stretch;
    }

    .item {
      width: 120px;
      /* height: 120px; */
    }

    .item1 {
      height: 80px;
      font-size: 30px;
    }

    .item2 {
      height: 150px;
      font-size: 40px;
    }

    .item3 {
      height: 60px;
      font-size: 12px;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1x</div>
    <div class="item item2">2x</div>
    <div class="item item3">3x</div>
    <div class="item item4">4x</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

08-container-align-content.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;
      flex-wrap: wrap;

      justify-content: space-between;
      align-content: center;
    }

    .item {
      width: 120px;
      height: 120px;
      /* margin-bottom: 10px; */
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1x</div>
    <div class="item item2">2x</div>
    <div class="item item3">3x</div>
    <div class="item item4">4x</div>
    <div class="item item2">2x</div>
    <div class="item item3">3x</div>
    <div class="item item4">4x</div>
    <div class="item item2">2x</div>
    <div class="item item3">3x</div>
    <div class="item item4">4x</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

09-item-order.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;
    }

    .item {
      width: 120px;
      height: 120px;
    }

    .item1 {
      order: 5;
    }

    .item2 {
      order: 3;
    }

    .item3 {
      order: 9;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

10-item-align-self.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;

      align-items: center;
    }

    .item {
      width: 120px;
      height: 120px;
    }

    .item1 {
      height: 90px;
    }

    .item2 {
      height: 150px;

      align-self: flex-start;
    }

    .item3 {
      height: 120px;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

11-item-flex-grow.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;
    }

    .item {
      width: 120px;
      height: 120px;

      flex-grow: 0;
    }

    .item1 {
      flex-grow: 1;
      max-width: 150px;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

12-item-flex-shrink.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;
    }

    .item {
      width: 120px;
      height: 120px;

      flex-shrink: 0;
    }

    .item1, .item2 {
      flex-shrink: 1;
    }

    .item1 {
      min-width: 100px;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
    <div class="item item4">4</div>
    <div class="item item5">5</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

13-item-flex-basis.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;
    }

    .item {
      width: 120px;
      /* 基礎(chǔ)尺寸 */
      flex-basis: 120px;
      height: 120px;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2我是jie_why_hahahaha</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

14-item-flex.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      height: 500px;
      background-color: orange;

      display: flex;
    }

    .item {
      width: 120px;
      height: 120px;

      /* flex-grow flex-shrink flex-basis */
      /* none: 0 0 auto */
      /* auto: 1 1 auto */
      flex: 1 1 10px;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2我是jiejie_why_hahahaha</div>
    <div class="item item3">3</div>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

15_flex布局常見問題.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
      width: 500px;
      background-color: #ddd;

      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
    }

    .item {
      width: 110px;
      height: 140px;

      /* margin-right: 20px; */
    }

    .container > i {
      width: 110px;
    }

    /* .item:nth-child(4n) {
      margin-right: 0;
    } */
  </style>
</head>
<body>
  
  <div class="container">
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
    <div class="item item1">1</div>
    <div class="item item2">2</div>
    <div class="item item3">3</div>
    <div class="item item3">3</div>
    <!-- 添加span的個(gè)數(shù)是列數(shù)減-2 -->
   <i></i><i></i>
  </div>

  <script src="./js/itemRandomColor.js"></script>
</body>
</html>

本文摘自 ：https://www.cnblogs.com/

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