在官方文檔中是這么形容下拉菜單插件的
一、通過data屬性:
<!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屬性實(shí)現(xiàn)下拉菜單</title></head><body><div class="container"> <div class="dropdown"> <!--通過data-toggle屬性來實(shí)現(xiàn)下拉菜單--> <button class="btn btn-info" data-toggle="dropdown"> 下拉列表 <span class="caret"></span> </button> <ul class="dropdown-menu"> <li>下拉項(xiàng)1</li>] jl;.' <li>下拉項(xiàng)2</li> <li>下拉項(xiàng)3</li> </ul> </div></div></body><script src="../../jquery/jquery-3.1.1.js"></script><script src="../../js/bootstrap.js"></script></html>
效果如下:
<!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>通過js調(diào)用下拉菜單切換</title></head><body><div class="container"> <div class="dropdown"> <!--通過data-toggle屬性來實(shí)現(xiàn)下拉菜單--> <button class="btn btn-info" data-toggle="dropdown"> 下拉列表 <span class="caret"></span> </button> <ul class="dropdown-menu dropdown-toggle"> <li>下拉項(xiàng)1</li> <li>下拉項(xiàng)2</li> <li>下拉項(xiàng)3</li> </ul> </div></div></body><script src="../../jquery/jquery-3.1.1.js"></script><script src="../../js/bootstrap.js"></script><script> /*通過文檔就緒函數(shù)來顯示或隱藏下拉菜單*/ $(document).ready(function(){ $(".dropdown-toggle").dropdown('toggle'); });</script></html>
效果如下:
一、導(dǎo)航欄內(nèi)實(shí)現(xiàn)下拉菜單效果
代碼如下:
<!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>導(dǎo)航欄內(nèi)下拉菜單的用法</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"> <!--通過data-toggle屬性來實(shí)現(xiàn)下拉菜單--> <button class="btn btn-info" data-toggle="dropdown"> 下拉列表 <span class="caret"></span> </button> <ul class="dropdown-menu"> <li>下拉項(xiàng)1</li> <li>下拉項(xiàng)2</li> <li>下拉項(xiàng)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>
效果如下:
<!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>標(biāo)簽形式實(shí)現(xiàn)下拉效果</title></head><body><div class="container"> <ul class="nav nav-tabs"> <li class="active"><a href="#">標(biāo)簽1</a></li> <li><a href="#">標(biāo)簽2</a></li> <li><a href="#">標(biāo)簽3</a></li> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown"> 標(biāo)簽4<span class="caret"></span> </a> <ul class="dropdown-menu"> <li><a href="#">下拉項(xiàng)1</a></li> <li><a href="#">下拉項(xiàng)2</a></li> <li><a href="#">下拉項(xiàng)3</a></li> </ul> </li> </ul></div></body><script src="../../jquery/jquery-3.1.1.js"></script><script src="../../js/bootstrap.js"></script></html>
效果如下:
<!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>膠囊形式實(shí)現(xiàn)下拉菜單效果</title></head><body><div class="container"> <ul class="nav nav-pills"> <li class="active"><a href="#">標(biāo)簽1</a></li> <li><a href="#">標(biāo)簽2</a></li> <li><a href="#">標(biāo)簽3</a></li> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown"> 標(biāo)簽4<span class="caret"></span> </a> <ul class="dropdown-menu"> <li><a href="#">下拉項(xiàng)1</a></li> <li><a href="#">下拉項(xiàng)2</a></li> <li><a href="#">下拉項(xiàng)3</a></li> </ul> </li> </ul></div></body><script src="../../jquery/jquery-3.1.1.js"></script><script src="../../js/bootstrap.js"></script></html>
效果如下:
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