Question

我的网站导航栏有问题。当我将导航栏展开时，它可以正常工作，但是当它处于折叠状态（适用于移动设备）时，导航栏中的下拉菜单项会将其他元素向左推，而忽略了代码（dropdown-menu-right）下拉菜单右对齐。

我不确定为什么要这样做。如果有人能找到解决方案，将不胜感激。

如果没有解决方案，我也想听听替代方法。

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<header class="navbar navbar-expand-sm bg-dark navbar-dark fixed-top border-bottom border-primary" id="main-nav">
  <a href="index.html" class="navbar-brand">Project Name</a>

  <button class="navbar-toggler" data-toggle="collapse" data-target="#navbarCollapse">
            <span class="navbar-toggler-icon"></span>
        </button>
  <div class="collapse navbar-collapse" id="navbarCollapse">
    <ul class="navbar-nav flex-row d-sm-flex justify-content-around ml-sm-auto">
      <li class="nav-item btn">
        <a href="index.html" class="nav-link active"><i class="fas fa-home"></i> Home</a>
      </li>
      <li class="nav-item btn">
        <a href="documentation/current/#" class="nav-link"><i class="fas fa-book"></i> Documentation</a>
      </li>
      <li class="nav-item dropdown btn">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          <i class="fas fa-globe"></i> English
        </a>
        <div class="dropdown-menu dropdown-menu-right" aria-labelledby="navbarDropdown">

          <h1 class="dropdown-header">
            <i class="fas fa-language fa-lg"></i> Language
          </h1>
          <div class="dropdown-divider"></div>
          <a class="dropdown-item active" href="#">English</a>
          <a class="dropdown-item disabled" href="#">Other Languages</a>
        </div>
      </li>
    </ul>
  </div>
</header>

<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>

Answer 1

设置dropdown-menu

的样式

.dropdown-menu{ position:absolute !important;}

（而不是!important，我建议直接将样式应用于div，以优先于Bootstrap的默认CSS）

Answer 2

这对我有用

#dropdown-menu-align-right.dropdown-toggle::after{
  margin:0px !important;  
  vertical-align: initial !important;  
}

.dropdown-toggle[aria-expanded="true"]:after{
  position:initial !important;
  display:inline !important;
  padding-right: 0px !important;  
  padding-bottom: 0px !important;
  padding-top: 0px !important;
  width: 0px !important;
  min-width: 0rem !important;
  padding-left: 4px !important;
  margin:0ox !important;
  
}

.dropdown-toggle[aria-expanded="false"]:before{
  padding-left: 4px !important;
  padding-right: 0px !important;
  padding-bottom: 0px !important;
  padding-top: 0px !important;
  position: initial !important;
  display: inline !important;  
  width: 0px !important;
  min-width: 0rem !important;  
}

Bootstrap 4导航栏下拉菜单更改其他导航项位置的问题

2 个答案: