XSmall | Small | Medium | Large | Extra Large | XXL | |
---|---|---|---|---|---|---|
Class prefix | .col- |
.col-sm- |
.col-md- |
.col-lg- |
.col-xl- |
.col-xxl- |
Screen width | <576px | >=576px | >=768px | >=992px | >=1200px | >=1400px |
假设我们有一个包含两列的简单布局。对于小型设备,我们希望将列拆分 25%/75%。
小型设备的定义是屏幕宽度从576 像素到767 像素。
对于小型设备,我们将使用 .col-sm-*
类。
我们将以下类添加到我们的两列中:
<div class="col-sm-3">....</div>
<div class="col-sm-9">....</div>
以下示例将导致小型(以及中型、大型、xlarge 和 xxlarge)设备上的 25%/75% 分割。在超小型设备上,它将自动堆叠(100%):
<div class="container-fluid">
<div class="row">
<div class="col-sm-3 bg-primary">
<p>Lorem ipsum...</p>
</div>
<div class="col-sm-9 bg-dark">
<p>Sed ut perspiciatis...</p>
</div>
</div>
</div>
自己尝试一下→
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container-fluid mt-3">
<h1>Small Grid</h1>
<p>The following example will result in a 25%/75% split on small, medium, large, xlarge and xxlarge devices (<strong>576px and above</strong>). On extra small devices, it will stack (100% width).</p>
<p>Resize the browser window to see the effect.</p>
<div class="container-fluid">
<div class="row">
<div class="col-sm-3 bg-primary text-white">
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br>
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
</div>
<div class="col-sm-9 bg-dark text-white">
Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
</div>
</div>
</div>
</div>
</body>
</html>
注意:确保总和等于或小于 12(不需要使用所有 12 个可用列):
对于 33.3%/66.6% 的分割,您可以使用 .col-sm-4
和 .col-sm-8
(对于 50%/50% 分割,您可以使用 .col-sm-6
和 .col -sm-6
):
<!-- 33.3/66.6% split: -->
<div class="container-fluid">
<div class="row">
<div class="col-sm-4 bg-primary">
<p>Lorem ipsum...</p>
</div>
<div class="col-sm-8 bg-dark">
<p>Sed ut perspiciatis...</p>
</div>
</div>
</div>
<!-- 50%/50% split: -->
<div class="container-fluid">
<div class="row">
<div class="col-sm-6 bg-primary">
<p>Lorem ipsum...</p>
</div>
<div class="col-sm-6 bg-dark">
<p>Sed ut perspiciatis...</p>
</div>
</div>
</div>
自己尝试一下 →
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container-fluid mt-3">
<h1>Small Grid</h1>
<p>The following example will result in a 33.3%/66.6% split on small, medium, large and xlarge devices (<strong>576px and above</strong>). On extra small devices, it will stack (100% width).</p>
<p>Resize the browser window to see the effect.</p>
<div class="container-fluid">
<div class="row">
<div class="col-sm-4 bg-primary text-white">
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br>
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
</div>
<div class="col-sm-8 bg-dark text-white">
Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
</div>
</div>
</div>
<br>
<p>This example will result in a 50%/50% split on small, medium, large and xlarge devices (<strong>576px and above</strong>). On extra small devices, it will stack (100% width).</p>
<div class="container-fluid">
<div class="row">
<div class="col-sm-6 bg-primary text-white">
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br>
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
</div>
<div class="col-sm-6 bg-dark text-white">
Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
</div>
</div>
</div>
</div>
</body>
</html>
在 Bootstrap 5 中,有一种简单的方法可以为所有设备创建等宽的列:只需从 .col-sm-*
中删除数字并仅使用 col 元素上的 ="w3-codespan">.col-sm
类。 Bootstrap 将识别有多少列,并且每列将获得相同的宽度。
如果屏幕尺寸小于 576px,列将水平堆叠:
<!-- Two columns: 50% width on all screens, except for extra small (100% width) -->
<div class="row">
<div class="col-sm">1 of 2</div>
<div class="col-sm">2 of 2</div>
</div>
<!-- Four columns: 25% width on all screens, except for extra small (100% width)-->
<div class="row">
<div class="col-sm">1 of 4</div>
<div class="col-sm">2 of 4</div>
<div class="col-sm">3 of 4</div>
<div class="col-sm">4 of 4</div>
</div>
自己尝试一下 →
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container-fluid mt-3">
<h1>Responsive Auto Layout Columns</h1>
<p>In Bootstrap 5, there is an easy way to create equal width columns: just use the <code>.col-sm</code> class on a specified number of col elements. Bootstrap will recognize how many columns there are, and each column will get the same width.</p>
<p>On extra small screens (<strong>less than 576px</strong>), the columns will stack horizontally.</p>
<div class="container-fluid">
<div class="row">
<div class="col-sm bg-primary text-white">1 of 2</div>
<div class="col-sm bg-dark text-white">2 of 2</div>
</div>
</div>
<br>
<div class="container-fluid">
<div class="row">
<div class="col-sm bg-primary text-white">1 of 4</div>
<div class="col-sm bg-dark text-white">2 of 4</div>
<div class="col-sm bg-primary text-white">3 of 4</div>
<div class="col-sm bg-dark text-white">4 of 4</div>
</div>
</div>
</div>
</body>
</html>
下一章介绍如何为中型设备添加不同的分割百分比。