Bootstrap 5 下拉列表
Bootstrap 5 下拉列表
基础的下拉列表
下拉菜单是一种可切换菜单,允许用户从预定义列表中选择值:
示例代码:
<div class="dropdown">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
下拉按钮
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
</ul>
</div>
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉列表</h2>
<p>.dropdown 类指示下拉菜单。</p>
<p>请使用 .dropdown-menu 类来实际构建下拉菜单。</p>
<p>如需打开下拉菜单,请使用设置了 .dropdown-toggle 类和 data-toggle="dropdown" 属性的按钮或链接。</p>
<div class="dropdown">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
Dropdown button
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
例子解释
.dropdown
类指示下拉菜单。
如需打开下拉菜单,请使用设置了 .dropdown-toggle
类和 data-toggle="dropdown"
属性的按钮或链接。
将 .dropdown-menu
类添加到 <div>
元素,可实际构建下拉菜单。然后将 .dropdown-item
类添加到下拉菜单中的每个元素(链接或按钮)。
下拉列表分隔线
.dropdown-divider
类用于通过水平细边框分隔下拉菜单中的链接:
示例代码:
<li><hr class="dropdown-divider"></hr></li>
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>.dropdown-divider 类用于通过水平细边框分隔下拉菜单中的链接:</p>
<div class="dropdown">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
Dropdown button
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
<li><hr class="dropdown-divider"></li>
<li><a class="dropdown-item" href="#">另一个链接</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
下拉列表标题
.dropdown-header
类用于在下拉菜单中添加标题:
示例代码:
<li><h5 class="dropdown-header">Dropdown header 1</h5></li>
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>The .dropdown-header class is used to add headers inside the dropdown menu:</p>
<div class="dropdown">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
Dropdown button
</button>
<ul class="dropdown-menu">
<li><h5 class="dropdown-header">下拉标题 1</h5></li>
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
<li><h5 class="dropdown-header">下拉标题 2</h5></li>
<li><a class="dropdown-item" href="#">另一个链接</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
禁用的和活动的项目
请使用 .active
类突出显示特定的下拉项(添加蓝色背景色)。
如需禁用下拉列表中的某个项目,请使用 .disabled
类(在悬停时获得浅灰色文本颜色和 "no-parking-sign" 图标)。
示例代码:
<li><a class="dropdown-item" href="#">普通的</a></li>
<li><a class="dropdown-item active" href="#">活动的</a></li>
<li><a class="dropdown-item disabled" href="#">禁用的</a></li>
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>.active 类为活动链接添加蓝色背景色。</p>
<p>.disabled 类禁用下拉项(灰色文本颜色和悬停时的禁止停车标志)。</p>
<div class="dropdown">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
Dropdown button
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">普通的</a></li>
<li><a class="dropdown-item active" href="#">活动的</a></li>
<li><a class="dropdown-item disabled" href="#">禁用的</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
下拉列表位置
您还可以通过将 .dropend
或 .dropstart
类添加到下拉元素,来创建 "dropend" 或 "dropstart" 菜单。请注意,插入符号/箭头是自动添加的:
Dropright
<div class="dropdown dropend">
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>在下拉菜单旁边添加 .dropend 类,可右对齐下拉菜单。请注意,插入符号/箭头是自动添加的:</p>
<div class="dropdown dropend">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
Dropend
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Normal</a></li>
<li><a class="dropdown-item active" href="#">Active</a></li>
<li><a class="dropdown-item disabled" href="#">Disabled</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
Dropleft
<div class="dropdown dropstart">
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>在下拉菜单旁边添加 .dropstart 类,可左对齐下拉菜单。请注意,插入符号/箭头是自动添加的。另请注意,我们将下拉菜单向右浮动:</p>
<div class="dropdown dropstart text-end">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
Dropstart
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">普通的</a></li>
<li><a class="dropdown-item active" href="#">活动的</a></li>
<li><a class="dropdown-item disabled" href="#">禁用的</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
下拉列表右对齐
如需右对齐下拉菜单,请将 .dropdown-menu-end
类添加到带有 .dropdown-menu
的元素:
示例代码:
<div class="dropdown-menu dropdown-menu-end">
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>将 .dropdown-menu-end 类添加到 .dropdown-menu 可右对齐下拉菜单。</p>
<div class="dropdown dropdown-menu-end">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
用于演示此例的宽的下拉按钮
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
上拉列表
如果您希望下拉菜单向上展开而不是向下展开,请将 class="dropdown" 的 <div> 元素更改为 "dropup"
:
示例代码:
<div class="dropup">
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>.dropup 类使下拉菜单向上而不是向下展开:</p>
<p>必须有上拉菜单展开的空间。所以我们添加了一些额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。</p>
<p>额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。额外的文本。</p>
<div class="dropup">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
上拉按钮
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
下拉文本
.dropdown-item-text
类用于为下拉项添加纯文本,或用于为链接添加默认链接样式。
示例代码:
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
<li><a class="dropdown-item-text" href="#">文本链接</a></li>
<li><span class="dropdown-item-text">纯文本</span></li>
</ul>
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>下拉菜单</h2>
<p>.dropdown-item-text 类用于向下拉列表添加纯文本,或用于链接的默认链接样式。</p>
<div class="dropdown">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
Dropdown button
</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">链接 1</a></li>
<li><a class="dropdown-item" href="#">链接 2</a></li>
<li><a class="dropdown-item" href="#">链接 3</a></li>
<li><a class="dropdown-item-text" href="#">文本链接</a></li>
<li><span class="dropdown-item-text">纯文本</span></li>
</ul>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
组合按钮和下拉列表
示例代码:
<div class="btn-group">
<button type="button" class="btn btn-primary">华为</button>
<button type="button" class="btn btn-primary">大疆</button>
<div class="btn-group">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">小米</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">手机</a></li>
<li><a class="dropdown-item" href="#">平板电脑</a></li>
</ul>
</div>
</div>
完整实例【亲自试一试】:
<!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@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>嵌套按钮组</h2>
<p>嵌套按钮组可创建下拉菜单:</p>
<div class="btn-group">
<button type="button" class="btn btn-primary">华为</button>
<button type="button" class="btn btn-primary">大疆</button>
<div class="btn-group">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">小米</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">手机</a></li>
<li><a class="dropdown-item" href="#">平板电脑</a></li>
</ul>
</div>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html
垂直组合按钮和下拉列表
示例代码:
<div class="btn-group-vertical">
<button type="button" class="btn btn-primary">华为</button>
<button type="button" class="btn btn-primary">大疆</button>
<div class="btn-group">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">小米</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">手机</a></li>
<li><a class="dropdown-item" href="#">平板电脑</a></li>
</ul>
</div>
</div>
完整实例【亲自试一试】:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>带下拉菜单的垂直按钮组</h2>
<div class="btn-group-vertical">
<button type="button" class="btn btn-primary">华为</button>
<button type="button" class="btn btn-primary">大疆</button>
<div class="btn-group">
<button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">小米</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">手机</a></li>
<li><a class="dropdown-item" href="#">平板电脑</a></li>
</ul>
</div>
</div>
</div>
</body>
</html>
可以使用本站在线JavaScript测试工具测试上述代码运行效果:http://www.phpcodeweb.com/runjs.html