Bootstrap5 模态框
模态框（Modal）是覆盖在父窗体上的子窗体。通常，目的是显示来自一个单独的源的内容，可以在不离开父窗体的情况下有一些互动。子窗体可提供信息交互等。
如何创建模态框
以下实例创建了一个简单的模态框效果 ：
<!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">
<h3>模态框实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>添加动画
使用 .fade 类可以设置模态框弹出或关闭的效果:
<!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">
<h3>模态框实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal fade" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>模态框尺寸
我们可以通过添加 .modal-sm 类来创建一个小模态框，.modal-lg 类可以创建一个大模态框。
尺寸类放在 <div>元素的 .modal-dialog 类后 :
小模态框
<!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">
<h3>模态框实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal fade" id="myModal">
<div class="modal-dialog modal-sm">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>大模态框
<!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">
<h3>模态框实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal fade" id="myModal">
<div class="modal-dialog modal-lg">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>超大模态框
<!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">
<h3>模态框实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal fade" id="myModal">
<div class="modal-dialog modal-xl">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>全屏幕显示
使用 .modal-fullscreen 类可以让模态框全屏幕显示:
<!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">
<h3>模态框实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal fade" id="myModal">
<div class="modal-dialog modal-fullscreen">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>使用 .modal-fullscreen-*-* 类可以控制在什么尺寸下全屏幕显示:
| 类 | 描述 |
|---|---|
.modal-fullscreen-sm-down
|
576px 以下尺寸全屏幕显示 |
.modal-fullscreen-md-down
|
768px 以下尺寸全屏幕显示 |
.modal-fullscreen-lg-down
|
992px 以下尺寸全屏幕显示 |
.modal-fullscreen-xl-down
|
1200px 以下尺寸全屏幕显示 |
.modal-fullscreen-xxl-down
|
1400px 以下尺寸全屏幕显示 |
模态框居中显示
使用 .modal-dialog-centered 类可以设置模态框水平和垂直方向都居中显示:
<!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@5.1.1/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h3>水平和垂直方向都居中显示</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal" id="myModal">
<div class="modal-dialog modal-dialog-centered">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>模态框滚动条
默认情况下模态框如果包含很多内容，页面会自动生成一个滚动，模态框随着页面的滚动而滚动:
<!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">
<h3>模态框滚动条实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..<br />
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</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>如果我们只想在模态框里头设置一个滚动条，可以使用 .modal-dialog-scrollable 类：
<!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">
<h3>模态框滚动条实例</h3>
<p>点击按钮打开模态框</p>
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
打开模态框
</button>
</div>
<!-- 模态框 -->
<div class="modal" id="myModal">
<div class="modal-dialog modal-dialog-scrollable">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title">模态框标题</h4>
<button type="button" class="btn-close" data-bs-dismiss="modal"></button>
</div>
<!-- 模态框内容 -->
<div class="modal-body">
模态框内容..<br />
模态框内容..<br />
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</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-bs-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>
</body>
</html>