html - 向下树结构中的多下拉
问题描述
我想创建一个始终向下显示的多下拉列表。我可以把它扔到一边，但我怎么只能把它往下扔？我已经在网上搜索了一段时间，但我找不到一个简单的解决方案。
我使用 Angular 5 作为我的语言，所以也许有一些我可以使用的 Angular 方法？
为了说明我的意思，请看下面的图片。
这是我的工作代码的副本，我们可以看到有很多子菜单，这就是为什么在这种情况下使用向下的树结构会更好。
.dropdown-submenu {
position: relative;
}
.dropdown-submenu>.dropdown-menu {
top: 0;
left: 100%;
margin-top: -6px;
margin-left: -1px;
-webkit-border-radius: 0 6px 6px 6px;
-moz-border-radius: 0 6px 6px;
border-radius: 0 6px 6px 6px;
}
.dropdown-submenu:hover>.dropdown-menu {
display: block;
}
.dropdown-submenu>a:after {
display: block;
content: " ";
float: right;
width: 0;
height: 0;
border-color: transparent;
border-style: solid;
border-width: 5px 0 5px 5px;
border-left-color: #ccc;
margin-top: 5px;
margin-right: -10px;
}
.dropdown-submenu:hover>a:after {
border-left-color: #fff;
}
.dropdown-submenu.pull-left {
float: none;
}
.dropdown-submenu.pull-left>.dropdown-menu {
left: -100%;
margin-left: 10px;
-webkit-border-radius: 6px 0 6px 6px;
-moz-border-radius: 6px 0 6px 6px;
border-radius: 6px 0 6px 6px;
}<div class="container">
<div class="row">
<div class="dropdown">
<a id="dLabel" role="button" data-toggle="dropdown" class="btn btn-primary" data-target="#" href="/page.html">
Top folder
<span class="caret"></span>
</a>
<ul class="dropdown-menu multi-level" role="menu" aria-labelledby="dropdownMenu">
<li class="dropdown-submenu">
<a tabindex="-1" href="#">Build Verification</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Daily (Commit)</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Data Processing</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Toolbar</a>
<ul class="dropdown-menu">
<li>
<a href="#">Project Browser</a>
</li>
<li>
<a href="#">Hardware Browser</a>
</li>
<li>
<a href="#">Monitor</a>
</li>
<li>
<a href="#">Data Search</a>
</li>
<li>
<a href="#">Meta Data</a>
</li>
</ul>
</li>
<li class="dropdown-submenu">
<a href="#">Tasks</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Setup</a>
<ul class="dropdown-menu">
<li>
<a href="#">Hammer</a>
</li>
<li>
<a href="#"> Manger</a>
</li>
<li>
<a href="#">Shaker</a>
</li>
<li>
<a href="#">DOFSetup</a>
</li>
<li>
<a href="#">Analysis Setup</a>
</li>
</ul>
</li>
<li class="dropdown-submenu">
<a href="#">Measurement</a>
<ul class="dropdown-menu">
<li>
<a href="#">Standard Measurement</a>
</li>
</ul>
</li>
<li class="dropdown-submenu">
<a href="#">Processing</a>
<ul class="dropdown-menu">
<li>
<a href="#">Time Data Review</a>
</li>
<li>
<a href="#">Standard Processing</a>
</li>
<li>
<a href="#">Time Editor</a>
</li>
</ul>
</li>
<li>
<a href="#">Analysis</a>
</li>
</ul>
</li>
</ul>
</li>
<li>
<a href="#">Hardware Setup</a>
</li>
<li>
<a href="#">Data Viewer</a>
</li>
<li>
<a href="#">Array Analysis</a>
</li>
<li>
<a href="#">ODS Analysis</a>
</li>
<li>
<a href="#">Shock Response Analysis</a>
</li>
<li>
<a href="#">Angle Domain Analysis</a>
</li>
<li>
<a href="#">Modal Analysis</a>
</li>
<li>
<a href="#">Correlation Analysis</a>
</li>
<li>
<a href="#">Data Recorder</a>
</li>
</ul>
</li>
<li>
<a href="#">CI</a>
</li>
</ul>
</li>
<li>
<a href="#">Deploy (Install)</a>
</li>
<li>
<a href="#">Front-end Setup</a>
</li>
<li>
<a href="#">Correlation Analysis</a>
</li>
<li>
<a href="#">Laser</a>
</li>
<li>
<a href="#">Model Analysis</a>
</li>
<li>
<a href="#">Angle Domain Analysis</a>
</li>
<li>
<a href="#">Shock Response Analysis</a>
</li>
<li>
<a href="#">ODS Analysis</a>
</li>
<li>
<a href="#">Array Analysis</a>
</li>
<li>
<a href="#">Data Processing</a>
</li>
<li>
<a href="#">Frontends</a>
</li>
<li>
<a href="#">Data Recorder</a>
</li>
<li>
<a href="#">Container</a>
</li>
<li>
<a href="#">Data Viewer</a>
</li>
<li>
<a href="#">Hardware</a>
</li>
<li>
<a href="#">Test Environment</a>
</li>
</ul>
</div>
</div>
</div> 解决方案
你的意思是达到这样的向下？
.dropdown-submenu {
position: relative;
}
.dropdown-submenu>.dropdown-menu {
top: 0;
left: 100%;
margin-top: -1px;
margin-left: -32px;
-webkit-border-radius: 0 6px 6px 6px;
-moz-border-radius: 0 6px 6px;
border-radius: 0 6px 6px 6px;
display:none;
}
.dropdown-submenu:hover>.dropdown-menu {
display: block;
}
.dropdown-submenu>a:after {
display: block;
content: " ";
float: right;
width: 0;
height: 0;
border-color: transparent;
border-style: solid;
border-width: 5px 0 5px 5px;
border-left-color: #ccc;
margin-top: 5px;
margin-right: -10px;
}
.dropdown-submenu:hover>a:after {
border-left-color: #fff;
}
.dropdown-submenu.pull-left {
float: none;
}
.dropdown-submenu.pull-left>.dropdown-menu {
left: -100%;
margin-left: 10px;
-webkit-border-radius: 6px 0 6px 6px;
-moz-border-radius: 6px 0 6px 6px;
border-radius: 6px 0 6px 6px;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
<div class="row">
<div class="dropdown">
<a id="dLabel" role="button" data-toggle="dropdown" class="btn btn-primary" data-target="#" href="/page.html">
Top folder
<span class="caret"></span>
</a>
<ul class="dropdown-menu multi-level" role="menu" aria-labelledby="dropdownMenu">
<li class="dropdown-submenu">
<a tabindex="-1" href="#">Build Verification</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Daily (Commit)</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Data Processing</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Toolbar</a>
<ul class="dropdown-menu">
<li>
<a href="#">Project Browser</a>
</li>
<li>
<a href="#">Hardware Browser</a>
</li>
<li>
<a href="#">Monitor</a>
</li>
<li>
<a href="#">Data Search</a>
</li>
<li>
<a href="#">Meta Data</a>
</li>
</ul>
</li>
<li class="dropdown-submenu">
<a href="#">Tasks</a>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a href="#">Setup</a>
<ul class="dropdown-menu">
<li>
<a href="#">Hammer</a>
</li>
<li>
<a href="#"> Manger</a>
</li>
<li>
<a href="#">Shaker</a>
</li>
<li>
<a href="#">DOFSetup</a>
</li>
<li>
<a href="#">Analysis Setup</a>
</li>
</ul>
</li>
<li class="dropdown-submenu">
<a href="#">Measurement</a>
<ul class="dropdown-menu">
<li>
<a href="#">Standard Measurement</a>
</li>
</ul>
</li>
<li class="dropdown-submenu">
<a href="#">Processing</a>
<ul class="dropdown-menu">
<li>
<a href="#">Time Data Review</a>
</li>
<li>
<a href="#">Standard Processing</a>
</li>
<li>
<a href="#">Time Editor</a>
</li>
</ul>
</li>
<li>
<a href="#">Analysis</a>
</li>
</ul>
</li>
</ul>
</li>
<li>
<a href="#">Hardware Setup</a>
</li>
<li>
<a href="#">Data Viewer</a>
</li>
<li>
<a href="#">Array Analysis</a>
</li>
<li>
<a href="#">ODS Analysis</a>
</li>
<li>
<a href="#">Shock Response Analysis</a>
</li>
<li>
<a href="#">Angle Domain Analysis</a>
</li>
<li>
<a href="#">Modal Analysis</a>
</li>
<li>
<a href="#">Correlation Analysis</a>
</li>
<li>
<a href="#">Data Recorder</a>
</li>
</ul>
</li>
<li>
<a href="#">CI</a>
</li>
</ul>
</li>
<li>
<a href="#">Deploy (Install)</a>
</li>
<li>
<a href="#">Front-end Setup</a>
</li>
<li>
<a href="#">Correlation Analysis</a>
</li>
<li>
<a href="#">Laser</a>
</li>
<li>
<a href="#">Model Analysis</a>
</li>
<li>
<a href="#">Angle Domain Analysis</a>
</li>
<li>
<a href="#">Shock Response Analysis</a>
</li>
<li>
<a href="#">ODS Analysis</a>
</li>
<li>
<a href="#">Array Analysis</a>
</li>
<li>
<a href="#">Data Processing</a>
</li>
<li>
<a href="#">Frontends</a>
</li>
<li>
<a href="#">Data Recorder</a>
</li>
<li>
<a href="#">Container</a>
</li>
<li>
<a href="#">Data Viewer</a>
</li>
<li>
<a href="#">Hardware</a>
</li>
<li>
<a href="#">Test Environment</a>
</li>
</ul>
</div>
</div>
</div>