我在下面使用此代码和CSS。如您所见,下拉子菜单向左扩展,这是我将光标悬停在“更多选项”上的时候。我已经更改了CSS上的每个“ left”关键字,但它不会向右移动。如何将下拉子菜单扩展到右侧,这意味着如果将鼠标悬停在“更多选项”上,它将像这样向右扩展?点击这里
<div class="container-fluid">
<div class="btn-group pull-right">
<a class="btn dropdown-toggle" data-toggle="dropdown" href="#">
Menu
<span class="caret"></span>
</a>
<ul class="dropdown-menu dropdown-menu-right" role="menu" aria-labelledby="dropdownMenu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li class="divider"></li>
<li class="dropdown-submenu dropdown-menu-right">
<a tabindex="-1" href="#">More options</a>
<ul class="dropdown-menu">
<li><a tabindex="-1" href="#">Second level</a></li>
<li class="dropdown-submenu">
<a href="#">More..</a>
<ul class="dropdown-menu">
<li><a href="#">3rd level</a></li>
<li><a href="#">3rd level</a></li>
</ul>
</li>
<li><a href="#">Second level</a></li>
<li><a href="#">Second level</a></li>
</ul>
</li>
<li><a href="#">Something else here</a></li>
</ul>
</div>
</div>
这是我的CSS;
.dropdown-submenu{position:relative;}
.dropdown-submenu>.dropdown-menu{top:0;left:-95%;max-width:180px;margin-top:-6px;margin-right:-1px;-webkit-border-radius:6px 6px 6px 6px;-moz-border-radius:6px 6px 6px 6px;border-radius:6px 6px 6px 6px;}
.dropdown-submenu:hover>.dropdown-menu{display:block;}
.dropdown-submenu>a:after{display:block;content:" ";float:left;width:0;height:0;border-color:transparent;border-style:solid;border-width:5px 5px 5px 0;border-right-color:#999;margin-top:5px;margin-right:10px;}
.dropdown-submenu:hover>a:after{border-left-color:#ffffff;}
.dropdown-submenu.pull-left{float:none;}
.dropdown-submenu.pull-left>.dropdown-menu{left:-100%;margin-left:10px;-webkit-border-radius:6px 6px 6px 6px;-moz-border-radius:6px 6px 6px 6px;border-radius:6px 6px 6px 6px;}
.dropdown-menu-right {margin-left:0;}
我刚刚从btn-group中删除了pull-right类
<div class="container-fluid">
<div class="btn-group">
<a class="btn dropdown-toggle" data-toggle="dropdown" href="#">
Menu
<span class="caret"></span>
</a>
<ul class="dropdown-menu dropdown-menu-right" role="menu" aria-labelledby="dropdownMenu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li class="divider"></li>
<li class="dropdown-submenu dropdown-menu-right">
<a tabindex="-1" href="#">More options</a>
<ul class="dropdown-menu">
<li><a tabindex="-1" href="#">Second level</a></li>
<li class="dropdown-submenu">
<a href="#">More..</a>
<ul class="dropdown-menu">
<li><a href="#">3rd level</a></li>
<li><a href="#">3rd level</a></li>
</ul>
</li>
<li><a href="#">Second level</a></li>
<li><a href="#">Second level</a></li>
</ul>
</li>
<li><a href="#">Something else here</a></li>
</ul>
并添加此CSS。
.dropdown-submenu{position:relative;}
.dropdown-submenu>.dropdown-menu{top:0;left: 100%;max-width:180px;margin-top:-6px;margin-right:-1px;-webkit-border-radius:6px 6px 6px 6px;-moz-border-radius:6px 6px 6px 6px;border-radius:6px 6px 6px 6px;}
.dropdown-submenu:hover>.dropdown-menu{display: inherit;/* right: inherit; */}
.dropdown-submenu>a:after{display:block;content:" ";float:left;width:0;height:0;border-color:transparent;border-style:solid;border-width:5px 5px 5px 0;border-right-color:#999;margin-top:5px;margin-right:10px;}
.dropdown-submenu:hover>a:after{border-left-color:#ffffff;}
.dropdown-submenu.pull-left{float:none;}.dropdown-submenu.pull-left>.dropdown-menu{left:-100%;margin-left:10px;-webkit-border-radius:6px 6px 6px 6px;-moz-border-radius:6px 6px 6px 6px;border-radius:6px 6px 6px 6px;}
.dropdown-menu-right {margin-left:0;}
.dropdown-menu-right {
right:inherit !important;
left: auto;
}
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