查看“Bootstrap5 Flex（弹性）布局”的源代码

{{DISPLAYTITLE:Bootstrap5 Flex}}[[Category:Bootstrap 5 教程|30]]
= Bootstrap5 Flex（弹性）布局 =

Bootstrap5 通过 flex 类来控制页面的布局。

== 弹性盒子(flexbox) ==

Bootstrap 3 与 Bootstrap 4/5 最大的区别就是 Bootstrap 4/5 使用弹性盒子来布局，而不是使用浮动来布局。

弹性盒子是 CSS3 的一种新的布局模式，更适合响应式的设计，如果你还不了解 flex，可以阅读我们的 [[css3 flexbox|CSS3 弹性盒子(Flex Box)]] 教程

<blockquote>注意：IE9 及其以下版本不支持弹性盒子，所以如果你需要兼容 IE8-9，请使用 [[bootstrap tutorial|Bootstrap 3]]。
</blockquote>
以下实例使用 d-flex 类创建一个弹性盒子容器，并设置三个弹性子元素：

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex p-3 bg-secondary text-white">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Flex</h2>
  <p>使用 d-flex 类创建一个弹性盒子容器，并设置三个弹性子元素：</p>
  <div class="d-flex p-3 bg-secondary text-white">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
创建显示在同一行上的弹性盒子容器可以使用 d-inline-flex 类:

<sample title="" desc="" lang="html" hererun="1">
<div class="d-inline-flex p-3 bg-secondary text-white">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>行内 Flex</h2>
  <p>创建显示在同一行上的弹性盒子容器可以使用 d-inline-flex 类:</p>
  <div class="d-inline-flex p-3 bg-secondary text-white">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
== 水平方向 ==

.flex-row 可以设置弹性子元素水平显示，这是默认的。

使用 .flex-row-reverse 类用于设置右对齐显示，即与 .flex-row 方向相反。

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex flex-row bg-secondary">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>

<div class="d-flex flex-row-reverse bg-secondary">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>水平方向</h2>
  <p>使用 .flex-row 类设置弹性子元素水平显示：</p>
  <div class="d-flex flex-row bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <p>.flex-row-reverse 设置右对齐方向:</p>
  <div class="d-flex flex-row-reverse bg-secondary">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
== 垂直方向 ==

.flex-column 类用于设置弹性子元素垂直方向显示, .flex-column-reverse 用于翻转子元素：

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex flex-column">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>

<div class="d-flex flex-column-reverse">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>垂直方向</h2>
  <p>.flex-column 类用于设置弹性子元素垂直方向显示：</p>
  <div class="d-flex flex-column mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <p>.flex-column-reverse 类用于设置弹性子元素垂直方向翻转显示：</p>
  <div class="d-flex flex-column-reverse">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
== 内容排列 ==

.justify-content-* 类用于修改弹性子元素的排列方式，* 号允许的值有：'''start (默认), end, center, between 或 around''':

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex justify-content-start">...</div>
<div class="d-flex justify-content-end">...</div>
<div class="d-flex justify-content-center">...</div>
<div class="d-flex justify-content-between">...</div>
<div class="d-flex justify-content-around">...</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Justify content</h2>
  <p>.justify-content-* 类用于修改弹性子元素的排列方式，* 号允许的值有：start (默认), end, center, between 或 around:</p>
  <div class="d-flex justify-content-start bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <div class="d-flex justify-content-end bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <div class="d-flex justify-content-center bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <div class="d-flex justify-content-between bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <div class="d-flex justify-content-around bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
== 等宽 ==

.flex-fill 类强制设置各个弹性子元素的宽度是一样的:

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex">
  <div class="p-2 bg-info flex-fill">Flex item 1</div>
  <div class="p-2 bg-warning flex-fill">Flex item 2</div>
  <div class="p-2 bg-primary flex-fill">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>等宽</h2>
  <p>.flex-fill  用于设置子元素等宽：</p>
  <div class="d-flex">
    <div class="p-2 bg-info flex-fill">Flex item 1</div>
    <div class="p-2 bg-warning flex-fill">Flex item 2</div>
    <div class="p-2 bg-primary flex-fill">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
== 扩展 ==

.flex-grow-1 用于设置子元素使用剩下的空间。以下实例中前面两个子元素只设置了它们所需要的空间，最后一个获取剩余空间。 :

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary flex-grow-1">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>扩展</h2>
  <p>.flex-grow-1 用于设置子元素使用剩下的空间：</p>
  <div class="d-flex mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 flex-grow-1 bg-primary">Flex item 3</div>
  </div>
  <p>不使用 .flex-grow-1 实例:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
'''提示:''' 使用 .flex-shrink-1 用于设置子元素的收缩规则。

== 排序 ==

.order 类可以设置弹性子元素的排序，从 .order-1 到 .order-12，数字越低权重越高( .order-1 排在 .order-2 之前) :

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex bg-secondary">
  <div class="p-2 bg-info order-3">Flex item 1</div>
  <div class="p-2 bg-warning order-2">Flex item 2</div>
  <div class="p-2 bg-primary order-1">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>排序</h2>
  <p>.order 类可以设置弹性子元素的排序，从 .order-1 到 .order-12，数字越低权重越高:</p>
  <div class="d-flex mb-3">
    <div class="p-2 order-3 bg-info">Flex item 1</div>
    <div class="p-2 order-2 bg-warning">Flex item 2</div>
    <div class="p-2 order-1 bg-primary">Flex item 3</div>
  </div>
</div>
</body>
</html> </run>
== 外边距 ==

.ms-auto 类可以设置子元素右外边距为 '''auto'''，即 margin-right: auto!important;，.me-auto 类可以设置子元素左外边距为 '''auto'''，即 margin-left: auto!important;:

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex mb-3 bg-secondary">
  <div class="p-2 ms-auto bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>
<div class="d-flex mb-3 bg-secondary">
  <div class="p-2  bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 me-auto bg-primary">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
  <h2>外边距</h2>
  <p>.ms-auto 类可以设置子元素右外边距为 auto，.me-auto 类可以设置子元素左外边距为 auto:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 ms-auto bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2  bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 me-auto bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
== 包裹 ==

弹性容器中包裹子元素可以使用以下三个类： .flex-nowrap (默认), .flex-wrap 或 .flex-wrap-reverse。设置 flex 容器是单行或者多行。

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex flex-wrap">..</div>

<div class="d-flex flex-wrap-reverse">..</div>

<div class="d-flex flex-nowrap">..</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>包裹</h2>
  <p>弹性容器中包裹弹性子元素可以使用以下三个类： .flex-nowrap (默认), .flex-wrap 或 .flex-wrap-reverse:</p>
  <p><code>.flex-wrap:</code></p>
  <div class="d-flex flex-wrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>
  <p><code>.flex-wrap-reverse:</code></p>
  <div class="d-flex flex-wrap-reverse bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>
  <p><code>.flex-nowrap:</code></p>
  <div class="d-flex flex-nowrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
    <div class="p-2 border">Flex item 26</div>
    <div class="p-2 border">Flex item 27</div>
    <div class="p-2 border">Flex item 28</div>
    <div class="p-2 border">Flex item 29</div>
    <div class="p-2 border">Flex item 30</div>
    <div class="p-2 border">Flex item 31</div>
    <div class="p-2 border">Flex item 32</div>
    <div class="p-2 border">Flex item 33</div>
    <div class="p-2 border">Flex item 34</div>
    <div class="p-2 border">Flex item 35</div>
  </div>
  <br>
</div>

</body>
</html> </run>
== 内容对齐 ==

我们可以使用 .align-content-* 来控制在垂直方向上如何去堆叠子元素，包含的值有：.align-content-start (默认), .align-content-end, .align-content-center, .align-content-between, .align-content-around 和 .align-content-stretch。

这些类在只有一行的弹性子元素中是无效的。

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex flex-wrap align-content-start">..</div>

<div class="d-flex flex-wrap align-content-end">..</div>

<div class="d-flex flex-wrap align-content-center">..</div>

<div class="d-flex flex-wrap align-content-around">..</div>

<div class="d-flex flex-wrap align-content-stretch">..</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>内容对齐</h2>
  <p>我们可以使用 .align-content-* 来控制子元素在垂直方向的对齐方式。</p>
  <p><strong>注意:</strong> 这个实例在小型设备上效果不好。这些类在只有一行的弹性子元素中是无效的。</p>
  <p>.align-content-start (默认):</p>
  <div class="d-flex flex-wrap align-content-start bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>
  <p>.align-content-end:</p>
  <div class="d-flex flex-wrap align-content-end bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>
  <p>.align-content-center:</p>
  <div class="d-flex flex-wrap align-content-center bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>
  <p>.align-content-around:</p>
  <div class="d-flex flex-wrap align-content-around bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>
  <p>.align-content-stretch:</p>
  <div class="d-flex flex-wrap align-content-stretch bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>
</div>

</body>
</html> </run>
== 子元素对齐 ==

如果要设置单行的子元素对齐可以使用 .align-items-* 类来控制，包含的值有：'''.align-items-start, .align-items-end, .align-items-center, .align-items-baseline, 和 .align-items-stretch (默认)'''。

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex align-items-start">..</div>

<div class="d-flex align-items-end">..</div>

<div class="d-flex align-items-center">..</div>

<div class="d-flex align-items-around">..</div>

<div class="d-flex align-items-stretch">..</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>子元素对齐</h2>
  <p>如果要设置单行的子元素对齐可以使用 .align-content-* 类来控制。</p>
  <p>.align-items-start:</p>
  <div class="d-flex align-items-start bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-items-end:</p>
  <div class="d-flex align-items-end bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-items-center:</p>
  <div class="d-flex align-items-center bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-items-baseline:</p>
  <div class="d-flex align-items-baseline bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-items-stretch (默认):</p>
  <div class="d-flex align-items-stretch bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
</div>

</body>
</html> </run>
== 指定子元素对齐 ==

如果要设置指定子元素对齐对齐可以使用 .align-self-* 类来控制，包含的值有：.align-self-start, .align-self-end, .align-self-center, .align-self-baseline, 和 .align-self-stretch (默认)。

<sample title="" desc="" lang="html" hererun="1">
<div class="d-flex bg-light" style="height:150px">
  <div class="p-2 border">Flex item 1</div>
  <div class="p-2 border align-self-start">Flex item 2</div>
  <div class="p-2 border">Flex item 3</div>
</div>
 </sample>
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Align Self</h2>
  <p>如果要设置指定子元素对齐对齐可以使用 .align-self-* 类来控制。</p>
  <p>.align-self-start:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-start">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-self-end:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-end">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-self-center:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-center">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-self-baseline:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-baseline">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
  <p>.align-self-stretch (默认):</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-stretch">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
</div>

</body>
</html> </run>

== 响应式 flex 类 ==

我们可以根据不同的设备，设置 flex 类，从而实现页面响应式布局，以下表格中的 * 号可以的值有：sm, md, lg 或 xl, 对应的是小型设备、中型设备，大型设备，超大型设备。

{| class="table table-striped table-hover"
!width="33%"| 类
!width="33%"| 实例
!width="33%"| 实现
|-
| 弹性容器
|
|
|-
| <code>.d-*-flex</code>
| 根据不同的屏幕设备创建弹性盒子容器
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>Flex</h2>
  <p>根据不同的屏幕设备创建弹性盒子容器, d-*-flex 类可以控制弹性元素的布局。</p>
  <p>重置浏览器查看效果。</p>
  <div class="d-flex bg-success">d-flex</div>
  <span class="d-sm-flex bg-success">d-sm-flex</span>
  <span class="d-md-flex bg-success">d-md-flex</span>
  <span class="d-lg-flex bg-success">d-lg-flex</span>
  <span class="d-xl-flex bg-success">d-xl-flex</span>
  <span class="d-xxl-flex bg-success">d-xxl-flex</span>
</div>

</body>
</html> </run>
|-
| <code>.d-*-inline-flex</code>
| 根据不同的屏幕设备创建行内弹性盒子容器
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>行内 Flex</h2>
  <p>根据不同的屏幕设备创建行内弹性盒子容器, d-*-inline-flex 类可以控制弹性元素的布局。</p>
  <p>重置浏览器查看效果。</p>
  <div class="d-inline-flex bg-success">d-flex</div>
  <div class="d-sm-inline-flex bg-success">d-sm-flex</div>
  <div class="d-md-inline-flex bg-success">d-md-flex</div>
  <div class="d-lg-inline-flex bg-success">d-lg-flex</div>
  <div class="d-xl-inline-flex bg-success">d-xl-flex</div>
  <div class="d-xxl-inline-flex bg-success">d-xxl-flex</div>
</div>

</body>
</html> </run>
|-
| 方向
|
|
|-
| <code>.flex-*-row</code>
| 根据不同的屏幕设备在水平方向显示弹性子元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>水平方向</h2>
  <p>.flex-row 可以设置弹性子元素水平显示(默认)。</p>
  <p>使用 .flex-sm|md|lg|xl|xxl-row 可以适应不同屏幕设置。重置浏览器查看效果。</p>
  <p><code>flex-row:</code></p>
  <div class="d-flex flex-row bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-sm-row:</code></p>
  <div class="d-sm-flex flex-sm-row bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-md-row:</code></p>
  <div class="d-md-flex flex-md-row bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-lg-row:</code></p>
  <div class="d-lg-flex flex-lg-row bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-xl-row:</code></p>
  <div class="d-xl-flex flex-xl-row bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-xxl-row:</code></p>
  <div class="d-xxl-flex flex-xxl-row bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.flex-*-row-reverse</code>
| 根据不同的屏幕设备在水平方向显示弹性子元素，且右对齐
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
  <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script>
  <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>水平方向</h2>
  <p>.flex-row 可以设置弹性子元素水平显示(默认)。</p>
  <p>使用 .flex-row-reverse 可以设置右对齐，使用 .flex-sm|md|lg|xl|xxl-row-reverse 可以适应不同屏幕设置。重置浏览器查看效果。</p>
  <p><code>flex-row-reverse:</code></p>
  <div class="d-flex flex-row-reverse bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-sm-row-reverse:</code></p>
  <div class="d-flex flex-sm-row-reverse bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-md-row-reverse:</code></p>
  <div class="d-flex flex-md-row-reverse bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-lg-row-reverse:</code></p>
  <div class="d-flex flex-lg-row-reverse bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-xl-row-reverse:</code></p>
  <div class="d-flex flex-xl-row-reverse bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>flex-xxl-row-reverse:</code></p>
  <div class="d-flex flex-xxl-row-reverse bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.flex-*-column</code>
| 根据不同的屏幕设备在垂直方向显示弹性子元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
  <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script>
  <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>垂直方向</h2>
  <p>.flex-column 类用于设置弹性子元素垂直方向显示。</p>
  <p>使用 .flex-sm|md|lg|xl|xxl-column 可以适应不同屏幕设置。重置浏览器查看效果。</p>
  <p><code>.flex-column</code>:</p>
  <div class="d-flex flex-column mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-sm-column</code>:</p>
  <div class="d-flex flex-sm-column mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-md-column</code>:</p>
  <div class="d-flex flex-md-column mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-lg-column</code>:</p>
  <div class="d-flex flex-lg-column mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-xl-column</code>:</p>
  <div class="d-flex flex-xl-column mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <p><code>.flex-xxl-column</code>:</p>
  <div class="d-flex flex-xxl-column mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.flex-*-column-reverse</code>
| 根据不同的屏幕设备在垂直方向显示弹性子元素，且方向相反
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>垂直方向</h2>
  <p>.flex-column 类用于设置弹性子元素垂直方向显示。</p>
  <p>使用 .flex-column-reverse 可以适应不同屏幕设置反向垂直子元素布局。重置浏览器查看效果。</p>
  <p><code>.flex-column-reverse</code>:</p>
  <div class="d-flex flex-column-reverse mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-sm-column-reverse</code>:</p>
  <div class="d-flex flex-sm-column-reverse mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-md-column-reverse</code>:</p>
  <div class="d-flex flex-md-column-reverse mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-lg-column-reverse</code>:</p>
  <div class="d-flex flex-lg-column-reverse mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-xl-column-reverse</code>:</p>
  <div class="d-flex flex-xl-column-reverse mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
  <p><code>.flex-xxl-column-reverse</code>:</p>
  <div class="d-flex flex-xxl-column-reverse mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| 内容对齐
|
|
|-
| <code>.justify-content-*-start</code>
| 根据不同屏幕设备在开始位置显示弹性子元素 (左对齐)
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>内容排列</h2>
  <p> .justify-content-*-start 类是在不同屏幕上在从开始位置 (左对齐) 上显示子元素。 <strong>注意:</strong>左对齐是默认的。</p>

  <p><code>.justify-content-start</code>:</p>
  <div class="d-flex justify-content-start bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-sm-start</code>:</p>
  <div class="d-flex justify-content-sm-start bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-md-start</code>:</p>
  <div class="d-flex justify-content-md-start bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-lg-start</code>:</p>
  <div class="d-flex justify-content-lg-start bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xl-start</code>:</p>
  <div class="d-flex justify-content-xl-start bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xxl-start</code>:</p>
  <div class="d-flex justify-content-xxl-start bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

</div>

</body>
</html> </run>
|-
| <code>.justify-content-*-end</code>
| 根据不同屏幕设备在尾部显示弹性子元素 (右对齐)
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>内容排列</h2>
  <p>.justify-content-*-end 类是在不同屏幕上在从结束位置 (右对齐) 上显示子元素。</p>
  <p>重置浏览器窗口，查看效果。</p>

  <p><code>.justify-content-end</code>:</p>
  <div class="d-flex justify-content-end bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-sm-end</code>:</p>
  <div class="d-flex justify-content-sm-end bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-md-end</code>:</p>
  <div class="d-flex justify-content-md-end bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-lg-end</code>:</p>
  <div class="d-flex justify-content-lg-end bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xl-end</code>:</p>
  <div class="d-flex justify-content-xl-end bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xxl-end</code>:</p>
  <div class="d-flex justify-content-xxl-end bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

</div>

</body>
</html> </run>
|-
| <code>.justify-content-*-center</code>
| 根据不同屏幕设备在 flex 容器中居中显示子元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>内容排列</h2>
  <p>.justify-content-*-center 类根据不同屏幕设备在 flex 容器中居中显示子元素。</p>
  <p>重置浏览器窗口，查看效果。</p>

  <p><code>.justify-content-center</code>:</p>
  <div class="d-flex justify-content-center bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-sm-center</code>:</p>
  <div class="d-flex justify-content-sm-center bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-md-center</code>:</p>
  <div class="d-flex justify-content-md-center bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-lg-center</code>:</p>
  <div class="d-flex justify-content-lg-center bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xl-center</code>:</p>
  <div class="d-flex justify-content-xl-center bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xxl-center</code>:</p>
  <div class="d-flex justify-content-xxl-center bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

</div>

</body>
</html> </run>
|-
| <code>.justify-content-*-between</code>
| 根据不同屏幕设备使用 &quot;between&quot; 显示弹性子元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>内容排列</h2>
  <p>.justify-content-*-between 根据不同屏幕设备使用 "between" 显示弹性子元素</p>
  <p>重置浏览器窗口，查看效果。</p>

  <p><code>.justify-content-between</code>:</p>
  <div class="d-flex justify-content-between bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-sm-between</code>:</p>
  <div class="d-flex justify-content-sm-between bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-md-between</code>:</p>
  <div class="d-flex justify-content-md-between bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-lg-between</code>:</p>
  <div class="d-flex justify-content-lg-between bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xl-between</code>:</p>
  <div class="d-flex justify-content-xl-between bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xxl-between</code>:</p>
  <div class="d-flex justify-content-xxl-between bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

</div>

</body>
</html> </run>
|-
| <code>.justify-content-*-around</code>
| 根据不同屏幕设备使用 &quot;around&quot; 显示弹性子元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>内容排列</h2>
  <p>.justify-content-*-around 根据不同屏幕设备使用 "around" 显示弹性子元素</p>
  <p>重置浏览器窗口大小，查看效果。</p>

  <p><code>.justify-content-around</code>:</p>
  <div class="d-flex justify-content-around bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-sm-around</code>:</p>
  <div class="d-flex justify-content-sm-around bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-md-around</code>:</p>
  <div class="d-flex justify-content-md-around bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-lg-around</code>:</p>
  <div class="d-flex justify-content-lg-around bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xl-around</code>:</p>
  <div class="d-flex justify-content-xl-around bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

  <p><code>.justify-content-xxl-around</code>:</p>
  <div class="d-flex justify-content-xxl-around bg-secondary mb-3">
    <div class="p-2 bg-info">Flex item 1</div>
    <div class="p-2 bg-warning">Flex item 2</div>
    <div class="p-2 bg-primary">Flex item 3</div>
  </div>

</div>

</body>
</html> </run>
|-
| 等宽
|
|
|-
| <code>.flex-*-fill</code>
| 根据不同的屏幕设备强制等宽
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>等宽</h2>
  <p>.flex-fill 类强制设置各个弹性子元素的宽度是一样的，.flex-*-fill 可以根据不同屏幕设备设置。</p>
  <p>重置浏览器窗口大小，查看效果。</p>

  <p><code>.flex-fill</code>:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 flex-fill bg-info">Flex item 1</div>
    <div class="p-2 flex-fill bg-warning">Flex item 2</div>
    <div class="p-2 flex-fill bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-sm-fill</code>:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 flex-sm-fill bg-info">Flex item 1</div>
    <div class="p-2 flex-sm-fill bg-warning">Flex item 2</div>
    <div class="p-2 flex-sm-fill bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-md-fill</code>:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 flex-md-fill bg-info">Flex item 1</div>
    <div class="p-2 flex-md-fill bg-warning">Flex item 2</div>
    <div class="p-2 flex-md-fill bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-lg-fill</code>:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 flex-lg-fill bg-info">Flex item 1</div>
    <div class="p-2 flex-lg-fill bg-warning">Flex item 2</div>
    <div class="p-2 flex-lg-fill bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-xl-fill</code>:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 flex-xl-fill bg-info">Flex item 1</div>
    <div class="p-2 flex-xl-fill bg-warning">Flex item 2</div>
    <div class="p-2 flex-xl-fill bg-primary">Flex item 3</div>
  </div>

  <p><code>.flex-xxl-fill</code>:</p>
  <div class="d-flex mb-3 bg-secondary">
    <div class="p-2 flex-xxl-fill bg-info">Flex item 1</div>
    <div class="p-2 flex-xxl-fill bg-warning">Flex item 2</div>
    <div class="p-2 flex-xxl-fill bg-primary">Flex item 3</div>
  </div>

</div>

</body>
</html> </run>
|-
| 扩展
|
|
|-
| <code>.flex-*-grow-0</code>
| 不同的屏幕设备不设置扩展
|  
|-
| <code>.flex-*-grow-1</code>
| 不同的屏幕设备设置扩展
|  
|-
| 收缩
|
|
|-
| <code>.flex-*-shrink-0</code>
| 不同的屏幕设备不设置收缩
|  
|-
| <code>.flex-*-shrink-1</code>
| 不同的屏幕设备设置收缩
|  
|-
| 包裹
|
|
|-
| <code>.flex-*-nowrap</code>
| 不同的屏幕设备不设置包裹元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>包裹</h2>
  <p>弹性容器中包裹子元素可以使用以下三个类： .flex-nowrap (默认), .flex-wrap 或 .flex-wrap-reverse。设置 flex 容器是单行或者多行。</p>
    <p>.flex-nowrap 不包裹元素。</p>
  <p><code>.flex-nowrap:</code></p>
  <div class="d-flex flex-nowrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-sm-nowrap:</code></p>
  <div class="d-flex flex-sm-nowrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-md-nowrap:</code></p>
  <div class="d-flex flex-md-nowrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-lg-nowrap:</code></p>
  <div class="d-flex flex-lg-nowrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-xl-nowrap:</code></p>
  <div class="d-flex flex-xl-nowrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
<p><code>.flex-xxl-nowrap:</code></p>
  <div class="d-flex flex-xxl-nowrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.flex-*-wrap</code>
| 不同的屏幕设备设置包裹元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>包裹</h2>
  <p>弹性容器中包裹子元素可以使用以下三个类： .flex-nowrap (默认), .flex-wrap 或 .flex-wrap-reverse。设置 flex 容器是单行或者多行。</p>
  <p> .flex-wrap 类可以包裹元素，重置浏览器窗口大小，查看效果。</p>

  <p><code>.flex-wrap:</code></p>
  <div class="d-flex flex-wrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-sm-wrap:</code></p>
  <div class="d-flex flex-sm-wrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-md-wrap:</code></p>
  <div class="d-flex flex-md-wrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-lg-wrap:</code></p>
  <div class="d-flex flex-lg-wrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-xl-wrap:</code></p>
  <div class="d-flex flex-xl-wrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <p><code>.flex-xxl-wrap:</code></p>
  <div class="d-flex flex-xxl-wrap bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.flex-*-wrap-reverse</code>
| 不同的屏幕设备反转包裹元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>包裹</h2>
  <p>弹性容器中包裹子元素可以使用以下三个类： .flex-nowrap (默认), .flex-wrap 或 .flex-wrap-reverse。设置 flex 容器是单行或者多行。</p>
  <p>.flex-wrap-reverse 类可以包裹元素，且会让元素反转。重置浏览器窗口大小，查看效果。</p>

  <p><code>.flex-wrap-reverse:</code></p>
  <div class="d-flex flex-wrap-reverse bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-sm-wrap-reverse:</code></p>
  <div class="d-flex flex-sm-wrap-reverse bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-md-wrap-reverse:</code></p>
  <div class="d-flex flex-md-wrap-reverse bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-lg-wrap-reverse:</code></p>
  <div class="d-flex flex-lg-wrap-reverse bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.flex-xl-wrap-reverse:</code></p>
  <div class="d-flex flex-xl-wrap-reverse bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>

  <p><code>.flex-xxl-wrap-reverse:</code></p>
  <div class="d-flex flex-xxl-wrap-reverse bg-light">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13</div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>

</body>
</html> </run>
|-
| 内容排列
|
|
|-
| <code>.align-content-*-start</code>
| 根据不同屏幕设备在起始位置堆叠元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>与头部对齐(默认)</h2>
  <p>.align-content-*-start 类在起始位置堆叠元素</p>

  <p><code>.align-content-start</code>:</p>
  <div class="d-flex flex-wrap align-content-start bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-sm-start</code>:</p>
  <div class="d-flex flex-wrap align-content-sm-start bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-md-start</code>:</p>
  <div class="d-flex flex-wrap align-content-md-start bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-lg-start</code>:</p>
  <div class="d-flex flex-wrap align-content-lg-start bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-xl-start</code>:</p>
  <div class="d-flex flex-wrap align-content-xl-start bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>

  <p><code>.align-content-xxl-start</code>:</p>
  <div class="d-flex flex-wrap align-content-xxl-start bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.align-content-*-end</code>
| 根据不同屏幕设备在结束位置堆叠元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>与尾部对齐</h2>
  <p>.align-content-*-end 根据不同屏幕设备在结束位置堆叠元素</p>
  <p>重置浏览器窗口大小，查看效果。</p>

  <p><code>.align-content-end</code>:</p>
  <div class="d-flex flex-wrap align-content-end bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-sm-end</code>:</p>
  <div class="d-flex flex-wrap align-content-sm-end bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-md-end</code>:</p>
  <div class="d-flex flex-wrap align-content-md-end bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-lg-end</code>:</p>
  <div class="d-flex flex-wrap align-content-lg-end bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-xl-end</code>:</p>
  <div class="d-flex flex-wrap align-content-xl-end bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>

  <p><code>.align-content-xxl-end</code>:</p>
  <div class="d-flex flex-wrap align-content-xxl-end bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.align-content-*-center</code>
| 根据不同屏幕设备在中间位置堆叠元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>居中位置</h2>
  <p>.align-content-*-center classes 根据不同屏幕设备在中间位置堆叠元素。</p>

  <p><code>.align-content-center</code>:</p>
  <div class="d-flex flex-wrap align-content-center bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-sm-center</code>:</p>
  <div class="d-flex flex-wrap align-content-sm-center bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-md-center</code>:</p>
  <div class="d-flex flex-wrap align-content-md-center bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-lg-center</code>:</p>
  <div class="d-flex flex-wrap align-content-lg-center bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-xl-center</code>:</p>
  <div class="d-flex flex-wrap align-content-xl-center bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>

  <p><code>.align-content-xxl-center</code>:</p>
  <div class="d-flex flex-wrap align-content-xxl-center bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>
</body>
</html> </run>
|-
| <code>.align-content-*-around</code>
| 根据不同屏幕设备，使用 &quot;around&quot; 堆叠元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>环绕对齐</h2>
  <p>根据不同屏幕设备，使用 "around" 堆叠元素</p>

  <p><code>.align-content-around</code>:</p>
  <div class="d-flex flex-wrap align-content-around bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-sm-around</code>:</p>
  <div class="d-flex flex-wrap align-content-sm-around bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-md-around</code>:</p>
  <div class="d-flex flex-wrap align-content-md-around bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-lg-around</code>:</p>
  <div class="d-flex flex-wrap align-content-lg-around bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-xl-around</code>:</p>
  <div class="d-flex flex-wrap align-content-xl-around bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>

  <p><code>.align-content-xxl-around</code>:</p>
  <div class="d-flex flex-wrap align-content-xxl-around bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.align-content-*-stretch</code>
| 根据不同屏幕设备，通过伸展元素来堆叠
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>延展对齐</h2>
  <p>.align-content-*-stretch 根据不同屏幕设备，通过伸展元素来堆叠。</p>

  <p><code>.align-content-stretch</code>:</p>
  <div class="d-flex flex-wrap align-content-stretch bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-sm-stretch</code>:</p>
  <div class="d-flex flex-wrap align-content-sm-stretch bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-md-stretch</code>:</p>
  <div class="d-flex flex-wrap align-content-md-stretch bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-lg-stretch</code>:</p>
  <div class="d-flex flex-wrap align-content-lg-stretch bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
  <br>

  <p><code>.align-content-xl-stretch</code>:</p>
  <div class="d-flex flex-wrap align-content-xl-stretch bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>

  <p><code>.align-content-xxl-stretch</code>:</p>
  <div class="d-flex flex-wrap align-content-xxl-stretch bg-light" style="height:300px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
    <div class="p-2 border">Flex item 4</div>
    <div class="p-2 border">Flex item 5</div>
    <div class="p-2 border">Flex item 6</div>
    <div class="p-2 border">Flex item 7</div>
    <div class="p-2 border">Flex item 8</div>
    <div class="p-2 border">Flex item 9</div>
    <div class="p-2 border">Flex item 10</div>
    <div class="p-2 border">Flex item 11</div>
    <div class="p-2 border">Flex item 12</div>
    <div class="p-2 border">Flex item 13 </div>
    <div class="p-2 border">Flex item 14</div>
    <div class="p-2 border">Flex item 15</div>
    <div class="p-2 border">Flex item 16</div>
    <div class="p-2 border">Flex item 17</div>
    <div class="p-2 border">Flex item 18</div>
    <div class="p-2 border">Flex item 19</div>
    <div class="p-2 border">Flex item 20</div>
    <div class="p-2 border">Flex item 21</div>
    <div class="p-2 border">Flex item 22</div>
    <div class="p-2 border">Flex item 23</div>
    <div class="p-2 border">Flex item 24</div>
    <div class="p-2 border">Flex item 25</div>
  </div>
</div>

</body>
</html> </run>
|-
| 排序
|
|
|-
| <code>.order-*-0-12</code>
| 在小屏幕尺寸上修改排序
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>排序</h2>
  <p>用 .order 类弹性元素的视觉顺序，从 0 到 12 。</p>
  <p>使用 .order-sm|md|lg|xl|xxl-0-12 在不同的尺寸屏幕上实现这个效果，也可以组合这些类实现更灵活的布局。</p>
  <p>调整浏览器窗口大小查看效果。</p>

  <p><code>.order</code>:</p>
  <div class="d-flex mb-3">
    <div class="p-2 order-3 bg-info">Flex item 1</div>
    <div class="p-2 order-2 bg-warning">Flex item 2</div>
    <div class="p-2 order-1 bg-primary">Flex item 3</div>
  </div>

  <p><code>.order-sm</code>:</p>
  <div class="d-flex mb-3">
    <div class="p-2 order-sm-3 bg-info">Flex item 1</div>
    <div class="p-2 order-sm-2 bg-warning">Flex item 2</div>
    <div class="p-2 order-sm-1 bg-primary">Flex item 3</div>
  </div>

  <p><code>.order-md</code>:</p>
  <div class="d-flex mb-3">
    <div class="p-2 order-md-3 bg-info">Flex item 1</div>
    <div class="p-2 order-md-2 bg-warning">Flex item 2</div>
    <div class="p-2 order-md-1 bg-primary">Flex item 3</div>
  </div>

  <p><code>.order-lg</code>:</p>
  <div class="d-flex mb-3">
    <div class="p-2 order-lg-3 bg-info">Flex item 1</div>
    <div class="p-2 order-lg-2 bg-warning">Flex item 2</div>
    <div class="p-2 order-lg-1 bg-primary">Flex item 3</div>
  </div>

  <p><code>.order-xl</code>:</p>
  <div class="d-flex mb-3">
    <div class="p-2 order-xl-3 bg-info">Flex item 1</div>
    <div class="p-2 order-xl-2 bg-warning">Flex item 2</div>
    <div class="p-2 order-xl-1 bg-primary">Flex item 3</div>
  </div>

  <p><code>.order-xxl</code>:</p>
  <div class="d-flex mb-3">
    <div class="p-2 order-xxl-3 bg-info">Flex item 1</div>
    <div class="p-2 order-xxl-2 bg-warning">Flex item 2</div>
    <div class="p-2 order-xxl-1 bg-primary">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| 元素对齐
|
|
|-
| <code>.align-items-*-start</code>
| 根据不同屏幕设备，让元素在头部显示在同一行。
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>元素对齐</h2>
  <p>.align-items-*-start 类根据不同屏幕设备，让元素在头部显示在同一行。</p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-items-stretch 是默认的。</p>

  <p><code>.align-items-start</code>:</p>
  <div class="d-flex align-items-start bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-sm-start</code>:</p>
  <div class="d-flex align-items-sm-start bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-md-start</code>:</p>
  <div class="d-flex align-items-md-start bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-lg-start</code>:</p>
  <div class="d-flex align-items-lg-start bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-xl-start</code>:</p>
  <div class="d-flex align-items-xl-start bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>

  <p><code>.align-items-xxl-start</code>:</p>
  <div class="d-flex align-items-xxl-start bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.align-items-*-end</code>
| 根据不同屏幕设备，让元素在尾部显示在同一行。
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
  <h2>元素对齐</h2>
  <p>.align-items-*-end 类根据不同屏幕设备，让元素在尾部显示在同一行。</p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-items-stretch 是默认的。</p>

  <p><code>.align-items-end</code>:</p>
  <div class="d-flex align-items-end bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-sm-end</code>:</p>
  <div class="d-flex align-items-sm-end bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-md-end</code>:</p>
  <div class="d-flex align-items-md-end bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-lg-end</code>:</p>
  <div class="d-flex align-items-lg-end bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-xl-end</code>:</p>
  <div class="d-flex align-items-xl-end bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>

  <p><code>.align-items-xxl-end</code>:</p>
  <div class="d-flex align-items-xxl-end bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.align-items-*-center</code>
| 根据不同屏幕设备，让元素在中间位置显示在同一行。
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>元素居中对齐</h2>
  <p>.align-items-*-center 类根据不同屏幕设备，让元素在中间位置显示在同一行。 </p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-items-stretch 是默认的。</p>

  <p><code>.align-items-center</code>:</p>
  <div class="d-flex align-items-center bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-sm-center</code>:</p>
  <div class="d-flex align-items-sm-center bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-md-center</code>:</p>
  <div class="d-flex align-items-md-center bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-lg-center</code>:</p>
  <div class="d-flex align-items-lg-center bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-xl-center</code>:</p>
  <div class="d-flex align-items-xl-center bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>

  <p><code>.align-items-xxl-center</code>:</p>
  <div class="d-flex align-items-xxl-center bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.align-items-*-baseline</code>
| 根据不同屏幕设备，让元素在基线上显示在同一行。
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>基线上对齐运算</h2>
  <p>.align-items-*-baseline 类根据不同屏幕设备，让元素在基线上显示在同一行。</p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-items-stretch 是默认的。</p>
  <p><code>.align-items-baseline</code>:</p>
  <div class="d-flex align-items-baseline bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-sm-baseline</code>:</p>
  <div class="d-flex align-items-sm-baseline bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-md-baseline</code>:</p>
  <div class="d-flex align-items-md-baseline bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-lg-baseline</code>:</p>
  <div class="d-flex align-items-lg-baseline bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-xl-baseline</code>:</p>
  <div class="d-flex align-items-xl-baseline bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>

  <p><code>.align-items-xxl-baseline</code>:</p>
  <div class="d-flex align-items-xxl-baseline bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| <code>.align-items-*-stretch</code>
| 根据不同屏幕设备，让元素延展高度并显示在同一行。
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>延展对齐元素 (默认)</h2>
  <p>.align-items-*-stretch 类根据不同屏幕设备，让元素延展高度并显示在同一行。</p>

  <p><code>.align-items-stretch</code>:</p>
  <div class="d-flex align-items-stretch bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-sm-stretch</code>:</p>
  <div class="d-flex align-items-sm-stretch bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-md-stretch</code>:</p>
  <div class="d-flex align-items-md-stretch bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-lg-stretch</code>:</p>
  <div class="d-flex align-items-lg-stretch bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-items-xl-stretch</code>:</p>
  <div class="d-flex align-items-xl-stretch bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>

  <p><code>.align-items-xxl-stretch</code>:</p>
  <div class="d-flex align-items-xl-stretch bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
</div>

</body>
</html> </run>
|-
| 单独一个子元素的对齐方式
|
|
|-
| <code>.align-self-*-start</code>
| 据不同屏幕设备，让单独一个子元素显示在头部。
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>单独显示在头部</h2>
  <p>.align-self-*-start 类据不同屏幕设备，让单独一个子元素显示在头部。</p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-self-stretch 是默认的。</p>

  <p><code>.align-self-start</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-start">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-sm-start</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-sm-start">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-md-start</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-md-start">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-lg-start</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-lg-start">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xl-start</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xl-start">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xxl-start</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xxl-start">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
</div>

</body>
</html> </run>
|-
| <code>.align-self-*-end</code>
| 据不同屏幕设备，让单独一个子元素显示在尾部
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>单独显示在尾部</h2>
  <p> .align-self-*-end 类据不同屏幕设备，让单独一个子元素显示在尾部。</p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-self-stretch 是默认的。</p>

  <p><code>.align-self-end</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-end">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-sm-end</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-sm-end">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-md-end</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-md-end">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-lg-end</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-lg-end">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xl-end</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xl-end">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xxl-end</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xxl-end">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
</div>

</body>
</html> </run>
|-
| <code>.align-self-*-center</code>
| 据不同屏幕设备，让单独一个子元素显示在居中位置
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>单独居中显示</h2>
  <p>.align-self-*-center 类据不同屏幕设备，让单独一个子元素显示在居中位置。</p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-self-stretch 是默认的。</p>

  <p><code>.align-self-center</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-center">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-sm-center</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-sm-center">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-md-center</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-md-center">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-lg-center</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-lg-center">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xl-center</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xl-center">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xxl-center</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xxl-center">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
</div>

</body>
</html> </run>
|-
| <code>.align-self-*-baseline</code>
| 据不同屏幕设备，让单独一个子元素显示在基线位置
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>基线位置上对齐单个元素</h2>
  <p>.align-self-*-baseline 类据不同屏幕设备，让单独一个子元素显示在基线位置。</p>
  <p>重置浏览器窗口大小，查看效果。 <strong>注意:</strong> align-self-stretch 是默认的。</p>

  <p><code>.align-self-baseline</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-baseline">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-sm-baseline</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-sm-baseline">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-md-baseline</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-md-baseline">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-lg-baseline</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-lg-baseline">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xl-baseline</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xl-baseline">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xxl-baseline</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xxl-baseline">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
</div>

</body>
</html> </run>
|-
| <code>.align-self-*-stretch</code>
| 据不同屏幕设备，延展一个单独子元素
|
<run name=""> <!DOCTYPE html>
<html>
<head>
  <title>Bootstrap5 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<div class="container mt-3">
  <h2>延展一个单独子元素(默认)</h2>
  <p>.align-self-*-stretch 类据不同屏幕设备，延展一个单独子元素。</p>

  <p><code>.align-self-stretch</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-stretch">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-sm-stretch</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-sm-stretch">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-md-stretch</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-md-stretch">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-lg-stretch</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-lg-stretch">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xl-stretch</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xl-stretch">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>

  <p><code>.align-self-xxl-stretch</code>:</p>
  <div class="d-flex bg-light" style="height:150px">
    <div class="p-2 border">Flex item 1</div>
    <div class="p-2 border align-self-xxl-stretch">Flex item 2</div>
    <div class="p-2 border">Flex item 3</div>
  </div>
  <br>
</div>

</body>
</html> </run>
|}