我正在尝试获取折叠菜单项以在页面加载时显示箭头,有没有办法执行此操作?目前正在加载时,在用户单击“文件”
之前,它不会显示箭头这是我的代码:
<ul class="list-unstyled components">
<p><b>Main Menu</b> </p>
<li>
<a href="#">About</a>
<a href="#pageSubmenu" data-toggle="collapse">Files</a>
<ul class="collapse list-unstyled " id="pageSubmenu">
<li><a href="#">+Photos</a></li>
<li><a href="#">+Videos</a></li>
<li><a href="#">+Music</a></li>
</ul>
</li>
</ul>
以下是正在发生的事情的截图
This is on page load
This is after I click on "files"
Finally this is after I close the list
正如您所见,加载页面时,右侧的箭头不会出现。试图让它出现让用户知道它是一个下拉列表
谢谢!
答案 0 :(得分:0)
添加aria-expanded =&#34; false&#34;到
<a href="#pageSubmenu" data-toggle="collapse">Files</a>
所以它将是
<a href="#pageSubmenu" data-toggle="collapse" aria-expanded="false">Files</a>
这将保持您当前的CSS
答案 1 :(得分:0)
$(document).ready(function(){
$('.dropdown-submenu a.test').on("click", function(e){
$(this).next('ul').toggle();
e.stopPropagation();
e.preventDefault();
});
});
&#13;
<style>
.dropdown-menu{
border-radius:0px !important;
}
.dropdown-submenu {
position: relative;
border-radius:0px !important;
}
.dropdown-submenu .dropdown-menu {
top: 0;
left: 100%;
margin-top: -1px;
border-radius:0px !important;
}
</style>
&#13;
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<div class="dropdown">
<button class="btn btn-success dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Menu Tutorials <span class="caret"></span></button>
<ul class="dropdown-menu">
<li><a tabindex="-1" href="#">Dropdown Menu 1</a></li>
<li><a tabindex="-1" href="#">Dropdown Menu 2</a></li>
<li class="dropdown-submenu">
<a class="test" tabindex="-1" href="#">Dropdown Menu 3 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a tabindex="-1" href="#">dropdown 1</a></li>
<li><a tabindex="-1" href="#">dropdown 2</a></li>
<li class="dropdown-submenu">
<a class="test" href="#">dropdown 3 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">dropdown 1</a></li>
<li><a href="#">dropdown 2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
</body>
</html>
&#13;
答案 2 :(得分:0)
你有两个选择:
首先,将 aria-expanded="false" 添加到“a”标签中,如下所示:
<a href="#pageSubmenu" data-toggle="collapse" aria-expanded="false">Files</a>
第二,通过在“a”标签中使用“fontawesome”图标,如下所示:
<a href="#pageSubmenu" data-toggle="collapse" >Files <i class="fas fa-angle-down"></i> </a>
*如果您想使用“fontawesome”,请不要忘记在标题中安装“fontawesome”库,请参阅以下链接中的文档以获取更多信息:
我希望这有帮助。