引导程序4使下拉菜单可滚动 [英] bootstrap 4 making dropdown scrollable
本文介绍了引导程序4使下拉菜单可滚动的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在较小的设备上,我的下拉菜单有问题.当我在此处尝试解决方案时(即 overflow:auto/overflow-y:scroll ),我无法使其滚动滚动,即使我使用 !important .即使下拉列表是打开的,我也可以滚动显示我的主页.
I have a problem with my drop down menu on smaller devices. i cannot make it scroll able when i tried the solution here (that is overflow:auto/ overflow-y:scroll) it's not working even if i use !important. What i'm able to scroll was my main page even if the drop down is open.
<nav class="navbar navbar-toggleable-sm ">
<button class="navbar-toggler navbar-toggler-right main-navbar-toggler" type="button" data-toggle="collapse" data-target="#main-nav-collapse" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
<span class="fa fa-bars"></span>
</button>
<a class="navbar-brand animation" data-animation ="fadeInLeft" href="#"><img src="/093017/img/logo-tmi.png" alt="logo"/></a>
<div class="collapse navbar-collapse" id = "main-nav-collapse" >
<ul class="nav navbar-nav navbar-main mr-auto mt-2 mt-md-0 animation" data-animation = "fadeInRight">
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Vehicles</a>
<div class="dropdown-menu default-menu main-menu sm-main-menu animation" data-animation = "fadeIn">
<!-- Nav tabs -->
<div class="sm-main-nav" >
<a class="dropdown-item" href="#">Cars</a><hr>
<a class="dropdown-item" href="#">Vans & Pickup</a><hr>
<a class="dropdown-item" href="#">SUVs & Crossover</a><hr>
<a class="dropdown-item" href="#">MPVs</a><hr>
<a class="dropdown-item" href="#">Hybrid</a><hr>
<a class="dropdown-item" href="#">Performance</a>
</div>
</div>
</li>
<li class="nav-item">
<a class="nav-link " href="#">Owners</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Shop</a>
</li>
<li class="nav-item">
<a class="nav-link " href="#">Promotions</a>
</li>
</ul>
</div>
推荐答案
只是您可以在CSS中使用@media
just you can use @media in your css
@media (max-width: 500px) {
.dropdown-menu{
height:200px;
overflow-y:auto;
}
}
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