在官方文档中是这么形容下拉菜单插件的
翻译过来就是:
通过此插件您可以为几乎所有东西添加下拉菜单,包括导航条、标签页、胶囊式按钮。
接下来,我们就按照官方文档所描述的那样,为大家演示, 我们如何通过JS插件为导航条、标签页以及胶囊式按钮添加下拉菜单。
用法部分:
一、通过data属性:
向链接或按钮添加 data-toggle=”dropdown” 来切换下拉菜单。
代码如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="../../css/bootstrap.css">
<link rel="stylesheet" href="../../css/bootstrap-theme.css">
<style>
.dropdown{
margin-top: 50px;
}
.dropdown-menu li{
margin-left: 20px;
}
</style>
<title>data属性实现下拉菜单</title>
</head>
<body>
<div class="container">
<div class="dropdown">
<!--通过data-toggle属性来实现下拉菜单-->
<button class="btn btn-info" data-toggle="dropdown">
下拉列表
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li>下拉项1</li>] jl;.'
<li>下拉项2</li>
<li>下拉项3</li>
</ul>
</div>
</div>
</body>
<script src="../../jquery/jquery-3.1.1.js"></script>
<script src="../../js/bootstrap.js"></script>
</html>
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
效果如下:
二、通过 JavaScript调用下拉菜单切换
代码如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="../../css/bootstrap.css">
<link rel="stylesheet" href="../../css/bootstrap-theme.css">
<style>
.dropdown{
margin-top: 50px;
}
.dropdown-menu li{
margin-left: 20px;
}
</style>
<title>通过js调用下拉菜单切换</title>
</head>
<body>
<div class="container">
<div class="dropdown">
<!--通过data-toggle属性来实现下拉菜单-->
<button class="btn btn-info" data-toggle="dropdown">
下拉列表
<span class="caret"></span>
</button>
<ul class="dropdown-menu dropdown-toggle">
<li>下拉项1</li>
<li>下拉项2</li>
<li>下拉项3</li>
</ul>
</div>
</div>
</body>
<script src="../../jquery/jquery-3.1.1.js"></script>
<script src="../../js/bootstrap.js"></script>
<script>
/*通过文档就绪函数来显示或隐藏下拉菜单*/
$(document).ready(function(){
$(".dropdown-toggle").dropdown('toggle');
});
</script>
</html>
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
效果如下:
除了初始页面下拉菜单是显示的,其余和通过data属性实现下拉菜单的效果完全一样!
值得注意的是:
data-toggle=”dropdown”仍然需要
无论您是通过JavaScript调用下拉菜单,还是使用数据api,
data-toggle=”dropdown”总是需要出现在下拉菜单的触发器元素上。
实例部分:
一、导航栏内实现下拉菜单效果
代码如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="../../css/bootstrap.css">
<link rel="stylesheet" href="../../css/bootstrap-theme.css">
<title>导航栏内下拉菜单的用法</title>
</head>
<body>
<div class="container-fluid">
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-form navbar-left">
<div class="form-group">
<input type="text" class="form-control">
</div>
<button class="btn btn-success">提交</button>
</div>
<div class="navbar-form navbar-left">
<div class="dropdown nav navbar-nav">
<!--通过data-toggle属性来实现下拉菜单-->
<button class="btn btn-info" data-toggle="dropdown">
下拉列表
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li>下拉项1</li>
<li>下拉项2</li>
<li>下拉项3</li>
</ul>
</div>
</div>
</div>
</nav>
</div>
</body>
<script src="../../jquery/jquery-3.1.1.js"></script>
<script src="../../js/bootstrap.js"></script>
</html>
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
效果如下:
二、标签页形式中实现下拉菜单效果
代码如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="../../css/bootstrap.css">
<link rel="stylesheet" href="../../css/bootstrap-theme.css">
<title>标签形式实现下拉效果</title>
</head>
<body>
<div class="container">
<ul class="nav nav-tabs">
<li class="active"><a href="#">标签1</a></li>
<li><a href="#">标签2</a></li>
<li><a href="#">标签3</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown">
标签4<span class="caret"></span>
</a>
<ul class="dropdown-menu">
<li><a href="#">下拉项1</a></li>
<li><a href="#">下拉项2</a></li>
<li><a href="#">下拉项3</a></li>
</ul>
</li>
</ul>
</div>
</body>
<script src="../../jquery/jquery-3.1.1.js"></script>
<script src="../../js/bootstrap.js"></script>
</html>
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
效果如下:
三、胶囊形式中实现下拉菜单效果
代码如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="../../css/bootstrap.css">
<link rel="stylesheet" href="../../css/bootstrap-theme.css">
<title>胶囊形式实现下拉菜单效果</title>
</head>
<body>
<div class="container">
<ul class="nav nav-pills">
<li class="active"><a href="#">标签1</a></li>
<li><a href="#">标签2</a></li>
<li><a href="#">标签3</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown">
标签4<span class="caret"></span>
</a>
<ul class="dropdown-menu">
<li><a href="#">下拉项1</a></li>
<li><a href="#">下拉项2</a></li>
<li><a href="#">下拉项3</a></li>
</ul>
</li>
</ul>
</div>
</body>
<script src="../../jquery/jquery-3.1.1.js"></script>
<script src="../../js/bootstrap.js"></script>
</html>
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
效果如下:
|