我创建了一个带引导程序的导航栏，下拉菜单的顶部和底部都有一条白线。我希望整个下拉列表颜色相同，但似乎无法弄清楚如何摆脱白线。顺便说一句，我是一名初学者编码器，这个导航栏是直接复制并粘贴在getboostrap上，所以如果有什么不对劲请告诉我，谢谢！ Here is a picture of the dropdown
这是我的HTML：
<nav class="navbar navbar-expand-lg navbar-dark" style="background-color:#3d3d3d">
<a class="navbar-brand" href="https://marginedge.com/" target="_blank">
<img src="navbarLogo.png" width="200">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Flow <span class="sr-only">(current)
</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Map</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">EDI Tracker</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">D.C. Sales</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Zendesk</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Client Facing
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Isabella</a>
<a class="dropdown-item" href="#">Eggspectation</a>
<a class="dropdown-item" href="#">Ford's</a>
<a class="dropdown-item" href="#">Hard Rock</a>
<a class="dropdown-item" href="#">Wendy's</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Demos</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Analyst
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">IR Error Report</a>
<a class="dropdown-item" href="#">Rec Error Report</a>
<a class="dropdown-item" href="#">Quarterly Team Evaluations</a>
<a class="dropdown-item" href="#">Data Fixer for Analysts</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Redash</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Central Data Health Check</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-lg-2" type="search" size="40" placeholder="Search Redash Reports..." aria-label="Search">
<button type="button" class="btn btn-outline-primary btn-lg">Search</button>
</form>
</div>
这里是CSS：
body{
padding: 0;
margin: 0;
}
nav {
width: 100%;
}
nav ul li{
padding: 5px 10px;
font-size: 20px;
}
.dropdown-menu a{
font-size: 15px;
color: #d6d6d6;
background-color: #3d3d3d;
}
答案 0 :(得分：0)
在.dropdown-menu上添加p-0课程。它将删除填充导致白色空间
body {
padding: 0;
margin: 0;
}
nav {
width: 100%;
}
nav ul li {
padding: 5px 10px;
font-size: 20px;
}
.dropdown-menu a {
font-size: 15px;
color: #d6d6d6;
background-color: #3d3d3d;
}<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<nav class="navbar navbar-expand-lg navbar-dark" style="background-color:#3d3d3d">
<a class="navbar-brand" href="https://marginedge.com/" target="_blank">
<img src="navbarLogo.png" width="200">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Flow <span class="sr-only">(current)
</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Map</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">EDI Tracker</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">D.C. Sales</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Zendesk</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Client Facing
</a>
<div class="dropdown-menu p-0" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Isabella</a>
<a class="dropdown-item" href="#">Eggspectation</a>
<a class="dropdown-item" href="#">Ford's</a>
<a class="dropdown-item" href="#">Hard Rock</a>
<a class="dropdown-item" href="#">Wendy's</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Demos</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Analyst
</a>
<div class="dropdown-menu p-0" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">IR Error Report</a>
<a class="dropdown-item" href="#">Rec Error Report</a>
<a class="dropdown-item" href="#">Quarterly Team Evaluations</a>
<a class="dropdown-item" href="#">Data Fixer for Analysts</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Redash</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Central Data Health Check</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-lg-2" type="search" size="40" placeholder="Search Redash Reports..." aria-label="Search">
<button type="button" class="btn btn-outline-primary btn-lg">Search</button>
</form>
</div>