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Bootstrap5 Flex（彈性）布局
2023-07-10 17:23 更新
Bootstrap5 通過(guò) flex 類來(lái)控制頁(yè)面的布局。
彈性盒子(flexbox)
Bootstrap 3 與 Bootstrap 4/5 最大的區(qū)別就是 Bootstrap 4/5 使用彈性盒子來(lái)布局，而不是使用浮動(dòng)來(lái)布局。
彈性盒子是 CSS3 的一種新的布局模式，更適合響應(yīng)式的設(shè)計(jì)，如果你還不了解 flex，可以閱讀我們的 CSS3 彈性盒子(Flex Box) 教程
注意：IE9 及其以下版本不支持彈性盒子，所以如果你需要兼容 IE8-9，請(qǐng)使用 Bootstrap 3。
以下實(shí)例使用 d-flex 類創(chuàng)建一個(gè)彈性盒子容器，并設(shè)置三個(gè)彈性子元素：
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>Flex</h2>
<p>使用 d-flex 類創(chuàng)建一個(gè)彈性盒子容器，并設(shè)置三個(gè)彈性子元素：</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>創(chuàng)建顯示在同一行上的彈性盒子容器可以使用 d-inline-flex 類:
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>行內(nèi) Flex</h2>
<p>創(chuàng)建顯示在同一行上的彈性盒子容器可以使用 d-inline-flex 類:</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>水平方向
.flex-row 可以設(shè)置彈性子元素水平顯示，這是默認(rèn)的。
使用 .flex-row-reverse 類用于設(shè)置右對(duì)齊顯示，即與 .flex-row 方向相反。
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>水平方向</h2>
<p>使用 .flex-row 類設(shè)置彈性子元素水平顯示：</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 設(shè)置右對(duì)齊方向:</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>垂直方向
.flex-column 類用于設(shè)置彈性子元素垂直方向顯示, .flex-column-reverse 用于翻轉(zhuǎn)子元素：
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>垂直方向</h2>
<p>.flex-column 類用于設(shè)置彈性子元素垂直方向顯示：</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 類用于設(shè)置彈性子元素垂直方向翻轉(zhuǎn)顯示：</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>內(nèi)容排列
.justify-content-* 類用于修改彈性子元素的排列方式，* 號(hào)允許的值有：start (默認(rèn)), end, center, between 或 around:
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>Justify content</h2>
<p>.justify-content-* 類用于修改彈性子元素的排列方式，* 號(hào)允許的值有：start (默認(rèn)), 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>等寬
.flex-fill 類強(qiáng)制設(shè)置各個(gè)彈性子元素的寬度是一樣的:
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>等寬</h2>
<p>.flex-fill 用于設(shè)置子元素等寬：</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>擴(kuò)展
.flex-grow-1 用于設(shè)置子元素使用剩下的空間。以下實(shí)例中前面兩個(gè)子元素只設(shè)置了它們所需要的空間，最后一個(gè)獲取剩余空間。
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>擴(kuò)展</h2>
<p>.flex-grow-1 用于設(shè)置子元素使用剩下的空間：</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 實(shí)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>提示: 使用 .flex-shrink-1 用于設(shè)置子元素的收縮規(guī)則。
排序
.order 類可以設(shè)置彈性子元素的排序，從 .order-1 到 .order-12，數(shù)字越低權(quán)重越高( .order-1 排在 .order-2 之前) :
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>排序</h2>
<p>.order 類可以設(shè)置彈性子元素的排序，從 .order-1 到 .order-12，數(shù)字越低權(quán)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>外邊距
.ms-auto 類可以設(shè)置子元素右外邊距為 auto，即 margin-right: auto!important;，.me-auto 類可以設(shè)置子元素左外邊距為 auto，即 margin-left: auto!important;:
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>外邊距</h2>
<p>.ms-auto 類可以設(shè)置子元素右外邊距為 auto，.me-auto 類可以設(shè)置子元素左外邊距為 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>包裹
彈性容器中包裹子元素可以使用以下三個(gè)類： .flex-nowrap (默認(rèn)), .flex-wrap 或 .flex-wrap-reverse。設(shè)置 flex 容器是單行或者多行。
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>包裹</h2>
<p>彈性容器中包裹彈性子元素可以使用以下三個(gè)類： .flex-nowrap (默認(rèn)), .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>內(nèi)容對(duì)齊
我們可以使用 .align-content-* 來(lái)控制在垂直方向上如何去堆疊子元素，包含的值有：.align-content-start (默認(rèn)), .align-content-end, .align-content-center, .align-content-between, .align-content-around 和 .align-content-stretch。
這些類在只有一行的彈性子元素中是無(wú)效的。
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>內(nèi)容對(duì)齊</h2>
<p>我們可以使用 .align-content-* 來(lái)控制子元素在垂直方向的對(duì)齊方式。</p>
<p><strong>注意:</strong> 這個(gè)實(shí)例在小型設(shè)備上效果不好。這些類在只有一行的彈性子元素中是無(wú)效的。</p>
<p>.align-content-start (默認(rèn)):</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>子元素對(duì)齊
如果要設(shè)置單行的子元素對(duì)齊可以使用 .align-items-* 類來(lái)控制，包含的值有：.align-items-start, .align-items-end, .align-items-center, .align-items-baseline, 和 .align-items-stretch (默認(rèn))。
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>子元素對(duì)齊</h2>
<p>如果要設(shè)置單行的子元素對(duì)齊可以使用 .align-content-* 類來(lái)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 (默認(rèn)):</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>指定子元素對(duì)齊
如果要設(shè)置指定子元素對(duì)齊對(duì)齊可以使用 .align-self-* 類來(lái)控制，包含的值有：.align-self-start, .align-self-end, .align-self-center, .align-self-baseline, 和 .align-self-stretch (默認(rèn))。
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap5 實(shí)例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="external nofollow" target="_blank" rel="stylesheet">
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ></script>
</head>
<body>
<div class="container mt-3">
<h2>Align Self</h2>
<p>如果要設(shè)置指定子元素對(duì)齊對(duì)齊可以使用 .align-self-* 類來(lái)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 (默認(rèn)):</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>響應(yīng)式 flex 類
我們可以根據(jù)不同的設(shè)備，設(shè)置 flex 類，從而實(shí)現(xiàn)頁(yè)面響應(yīng)式布局，以下表格中的 * 號(hào)可以的值有：sm, md, lg 或 xl, 對(duì)應(yīng)的是小型設(shè)備、中型設(shè)備，大型設(shè)備，超大型設(shè)備。
| 類 | 實(shí)例 |
|---|---|
| 彈性容器 | |
.d-*-flex
|
根據(jù)不同的屏幕設(shè)備創(chuàng)建彈性盒子容器 |
.d-*-inline-flex
|
根據(jù)不同的屏幕設(shè)備創(chuàng)建行內(nèi)彈性盒子容器 |
| 方向 | |
.flex-*-row
|
根據(jù)不同的屏幕設(shè)備在水平方向顯示彈性子元素 |
.flex-*-row-reverse
|
根據(jù)不同的屏幕設(shè)備在水平方向顯示彈性子元素，且右對(duì)齊 |
.flex-*-column
|
根據(jù)不同的屏幕設(shè)備在垂直方向顯示彈性子元素 |
.flex-*-column-reverse
|
根據(jù)不同的屏幕設(shè)備在垂直方向顯示彈性子元素，且方向相反 |
| 內(nèi)容對(duì)齊 | |
.justify-content-*-start
|
根據(jù)不同屏幕設(shè)備在開(kāi)始位置顯示彈性子元素 (左對(duì)齊) |
.justify-content-*-end
|
根據(jù)不同屏幕設(shè)備在尾部顯示彈性子元素 (右對(duì)齊) |
.justify-content-*-center
|
根據(jù)不同屏幕設(shè)備在 flex 容器中居中顯示子元素 |
.justify-content-*-between
|
根據(jù)不同屏幕設(shè)備使用 "between" 顯示彈性子元素 |
.justify-content-*-around
|
根據(jù)不同屏幕設(shè)備使用 "around" 顯示彈性子元素 |
| 等寬 | |
.flex-*-fill
|
根據(jù)不同的屏幕設(shè)備強(qiáng)制等寬 |
| 擴(kuò)展 | |
.flex-*-grow-0
|
不同的屏幕設(shè)備不設(shè)置擴(kuò)展 |
.flex-*-grow-1
|
不同的屏幕設(shè)備設(shè)置擴(kuò)展 |
| 收縮 | |
.flex-*-shrink-0
|
不同的屏幕設(shè)備不設(shè)置收縮 |
.flex-*-shrink-1
|
不同的屏幕設(shè)備設(shè)置收縮 |
| 包裹 | |
.flex-*-nowrap
|
不同的屏幕設(shè)備不設(shè)置包裹元素 |
.flex-*-wrap
|
不同的屏幕設(shè)備設(shè)置包裹元素 |
.flex-*-wrap-reverse
|
不同的屏幕設(shè)備反轉(zhuǎn)包裹元素 |
| 內(nèi)容排列 | |
.align-content-*-start
|
根據(jù)不同屏幕設(shè)備在起始位置堆疊元素 |
.align-content-*-end
|
根據(jù)不同屏幕設(shè)備在結(jié)束位置堆疊元素 |
.align-content-*-center
|
根據(jù)不同屏幕設(shè)備在中間位置堆疊元素 |
.align-content-*-around
|
根據(jù)不同屏幕設(shè)備，使用 "around" 堆疊元素 |
.align-content-*-stretch
|
根據(jù)不同屏幕設(shè)備，通過(guò)伸展元素來(lái)堆疊 |
| 排序 | |
.order-*-0-12
|
在小屏幕尺寸上修改排序 |
| 元素對(duì)齊 | |
.align-items-*-start
|
根據(jù)不同屏幕設(shè)備，讓元素在頭部顯示在同一行。 |
.align-items-*-end
|
根據(jù)不同屏幕設(shè)備，讓元素在尾部顯示在同一行。 |
.align-items-*-center
|
根據(jù)不同屏幕設(shè)備，讓元素在中間位置顯示在同一行。 |
.align-items-*-baseline
|
根據(jù)不同屏幕設(shè)備，讓元素在基線上顯示在同一行。 |
.align-items-*-stretch
|
根據(jù)不同屏幕設(shè)備，讓元素延展高度并顯示在同一行。 |
| 單獨(dú)一個(gè)子元素的對(duì)齊方式 | |
.align-self-*-start
|
據(jù)不同屏幕設(shè)備，讓單獨(dú)一個(gè)子元素顯示在頭部。 |
.align-self-*-end
|
據(jù)不同屏幕設(shè)備，讓單獨(dú)一個(gè)子元素顯示在尾部 |
.align-self-*-center
|
據(jù)不同屏幕設(shè)備，讓單獨(dú)一個(gè)子元素顯示在居中位置 |
.align-self-*-baseline
|
據(jù)不同屏幕設(shè)備，讓單獨(dú)一個(gè)子元素顯示在基線位置 |
.align-self-*-stretch
|
據(jù)不同屏幕設(shè)備，延展一個(gè)單獨(dú)子元素 |
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