Bootstrap 4:下拉菜单从屏幕右侧消失 [英] Bootstrap 4: Dropdown menu is going off to the right of the screen

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本文介绍了Bootstrap 4:下拉菜单从屏幕右侧消失的处理方法,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

我似乎无法让下拉项目不离开页面.我从 BS3 尝试了一些东西,但它们似乎不起作用.我不确定是否是因为 ml-auto.(忽略 if-else 语句)

这是 CodePen:

<nav class="navbar fixed-top navbar-toggleable-md navbar-inverse";style="background-color: #3c763d!important;"><button class="navbar-toggler navbar-toggler-right navbar-toggler-custom";类型=按钮"数据切换=折叠"数据目标=#searchNav";aria-controls="searchav";aria-expanded="false";aria-label =切换导航"><span class="navbar-toggler-icon"></span><button class="navbar-toggler navbar-toggler-right";类型=按钮"数据切换=折叠"数据目标=#navbarNav";aria-controls="navbarNav";aria-expanded="false";aria-label =切换导航"><span class="navbar-toggler-icon"></span><!-- <button class="navbar-toggler navbar-toggler-right";类型=按钮"数据切换=折叠"数据目标=#navbarToggleExternalContent"aria-controls="navbarToggleExternalContent";aria-expanded="false";aria-label =切换导航"><span class="navbar-toggler-icon"></span>--><div id="logo"><a class="navbar-brand";href=/">公司</a>

<div class="collapse navbar-collapse";id="searchNav"><ul class="navbar-nav mx-auto"><form action="/search";class =表单内联"><input class="form-control mr-sm-2";id=关键字"名称=关键字":value='keyword' type="text"placeholder="搜索工作";/><!-- <div class="input-group">--><input class="form-control mr-sm-2";id=位置"名称=位置":value='location' type="text"占位符=位置"/><!-- <button class="btn btn-secondary";type="button">Find Jobs</button>--><!-- </span>--><!-- </div>--><button class="btn btn-secondary my-2 my-sm-0";type="submit">Find Jobs</button></表单>

<div class="collapse navbar-collapse";id="navbarNav"><ul class="navbar-nav ml-auto"><li class="nav-item"><a href="/post";class=nav-link"><strong>发布职位</strong></a></li><div class="hidden-lg-up"><li v-if="!user_logged";class="nav-item"><a v-if="!user_logged";href="/注册";class=nav-link"><strong>注册</strong></a><li v-if="user_logged &&user_type === '用户'";class="nav-item"><a v-if="user_logged &&user_type === '用户'";href="/profile";class=nav-link"><strong>个人资料</strong></a><li v-if="user_logged &&user_type === '用户'";class="nav-item"><a v-if="user_logged &&user_type === '用户'";href="/applied";class=nav-link"><strong>我的工作</strong></a><li v-if="user_logged &&user_type === '用户'";class="nav-item"><a v-if="user_logged &&user_type === '用户'";href="/searches";class="nav-link"><strong>我的搜索</strong></a><li v-if="user_logged &&user_type === '公司'";class="nav-item"><a v-if="user_logged &&user_type === '公司'";href="/dashboard";class=nav-link"><strong>雇主仪表板</strong></a><li v-if="!user_logged";class="nav-item"><a v-if="!user_logged";href="/登录";class="nav-link">登录<li v-if="user_logged";class="nav-item"><a v-if="user_logged";href="/注销";class=nav-link"><strong>注销</strong></a>

<div class="hidden-md-down"><li class="nav-item dropdown"><a class="nav-link dropdown-toggle";href="/";id="navbarDropdownMenuLink";数据切换=下拉"aria-haspopup="true";aria-expanded="false"><strong>帐户</strong></a><div class="下拉菜单";aria-labelledby=navbarDropdownMenuLink"><!-- <li v-if="!user_logged";class="nav-item">--><a v-if="!user_logged";href="/注册";class="dropdown-item">注册<!-- </li>--><!-- <li v-if="user_logged &&user_type === '用户'";class="nav-item">--><a v-if="user_logged &&user_type === '用户'";href="/profile";class="dropdown-item"><strong>个人资料</strong></a><a v-if="user_logged &&user_type === '用户'";href="/applied";class="dropdown-item"><strong>我的工作</strong></a><a v-if="user_logged &&user_type === '用户'";href="/searches";class="dropdown-item"><strong>我的搜索</strong></a><!-- </li>--><!-- <li v-if="user_logged &&user_type === '公司'";class="nav-item">--><a v-if="user_logged &&user_type === '公司'";href="/dashboard";class="dropdown-item"><strong>雇主仪表板</strong></a><!-- </li>--><!-- <li v-if="!user_logged";class="nav-item">--><a v-if="!user_logged";href="/登录";class="dropdown-item">登录<!-- </li>--><!-- <li v-if="user_logged";class="nav-item">--><a v-if="user_logged";href="/注销";类=下拉项"><div class="dropdown-divider"></div><strong>注销</strong></a><!-- </li>-->

</nav>

解决方案

Bootstrap 已经内置了这个:参见 菜单对齐.只需将 dropdown-menu-right 类添加到 dropdown-menu div.

工作示例:(打开整页)

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" rel="样式表"/><nav class="navbar navbar-expand-xl navbar-dark bg-primary"><button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle导航"><span class="navbar-toggler-icon"></span><a class="navbar-brand" href="#">公司</a><div class="collapse navbar-collapse" id="navbarSupportedContent"><form action="#" class="form-inline my-2 my-lg-0"><input class="form-control mr-sm-2" id="keyword" name="keyword" :value='keyword' type="text" placeholder="搜索工作"/><input class="form-control mr-sm-2" id="location" name="location" :value='location' type="text" placeholder="Location"/><button class="btn btn-secondary my-2 my-sm-0" type="submit">找工作</button></表单><ul class="navbar-nav mr-auto"><li class="nav-item"><a href="#" class="nav-link active"><strong>发布职位</strong></a><li class="nav-item"><a href="#" class="nav-link"><strong>注册</strong></a><li class="nav-item"><a href="#" class="nav-link"><strong>个人资料</strong></a><li class="nav-item"><a href="#" class="nav-link"><strong>我的工作</strong></a><li class="nav-item"><a href="#" class="nav-link"><strong>我的搜索</strong></a><li class="nav-item"><a href="#" class="nav-link"><strong>雇主仪表板</strong></a><li class="nav-item"><a href="#" class="nav-link"><strong>登录</strong></a><li class="nav-item"><a href="#" class="nav-link"><strong>注销</strong></a><ul class="navbar-nav"><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"><strong>帐户</strong></a><div class="dropdown-menu dropdown-menu-right" aria-labelledby="navbarDropdown"><a class="dropdown-item"><strong>注册</strong></a><a href="#" class="dropdown-item"><strong>个人资料</strong></a><a href="#" class="dropdown-item"><strong>我的工作</strong></a><a href="#" class="dropdown-item"><strong>我的搜索</strong></a><a href="#" class="dropdown-item"><strong>雇主仪表板</strong></a><a href="#" class="dropdown-item"><strong>登录</strong></a><a href="#" class="dropdown-item"><div class="dropdown-divider"></div><strong>注销</strong></a>

</nav><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/2.4.2/umd/popper.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.min.js"></script>

I can't seem to get the drop down items to not go off the page. I tried a couple of things from BS3 but they don't seem to work. I'm not sure if its because of the ml-auto. (ignore the if-else statements)

Here's the CodePen:

<div class="container-fluid">
  <nav class="navbar fixed-top navbar-toggleable-md navbar-inverse" style="background-color: #3c763d!important;">

    <button class="navbar-toggler navbar-toggler-right navbar-toggler-custom" type="button" data-toggle="collapse" data-target="#searchNav" aria-controls="searchav" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>

    </button>

    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>

    </button>

    <!-- <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarToggleExternalContent" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
    </button> -->

    <div id="logo">
      <a class="navbar-brand" href="/">Company</a>
    </div>

    <div class="collapse navbar-collapse" id="searchNav">
      <ul class="navbar-nav mx-auto">

        <form action="/search" class="form-inline">
          <input class="form-control mr-sm-2" id="keyword" name="keyword" :value='keyword' type="text" placeholder="Search for jobs" />
          <!-- <div class="input-group"> -->

          <input class="form-control mr-sm-2" id="location" name="location" :value='location' type="text" placeholder="Location" />
          <!-- <button class="btn btn-secondary" type="button">Find Jobs</button> -->
          <!-- </span> -->
          <!-- </div> -->

          <button class="btn btn-secondary my-2 my-sm-0" type="submit">Find Jobs</button>
        </form>

      </ul>
    </div>
    <div class="collapse navbar-collapse" id="navbarNav">

      <ul class="navbar-nav ml-auto">
        <li class="nav-item"><a href="/post" class="nav-link"><strong>Post Job</strong></a></li>

        <div class="hidden-lg-up">

          <li v-if="!user_logged" class="nav-item">
            <a v-if="!user_logged" href="/signup" class="nav-link"><strong>Register</strong></a>
          </li>

          <li v-if="user_logged && user_type === 'user'" class="nav-item">
            <a v-if="user_logged && user_type === 'user'" href="/profile" class="nav-link"><strong>Profile</strong></a>
          </li>

          <li v-if="user_logged && user_type === 'user'" class="nav-item">
            <a v-if="user_logged && user_type === 'user'" href="/applied" class="nav-link"><strong>My Jobs</strong></a>
          </li>

          <li v-if="user_logged && user_type === 'user'" class="nav-item">
            <a v-if="user_logged && user_type === 'user'" href="/searches" class="nav-link"><strong>My Searches</strong></a>
          </li>

          <li v-if="user_logged && user_type === 'company'" class="nav-item">
            <a v-if="user_logged && user_type === 'company'" href="/dashboard" class="nav-link"><strong>Employer Dashboard</strong></a>
          </li>

          <li v-if="!user_logged" class="nav-item">
            <a v-if="!user_logged" href="/login" class="nav-link"><strong>Login</strong></a>
          </li>

          <li v-if="user_logged" class="nav-item">
            <a v-if="user_logged" href="/logout" class="nav-link"><strong>Logout</strong></a>
          </li>
        </div>

        <div class="hidden-md-down">
          <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" href="/" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
              <strong>Account</strong>
            </a>
            <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">

              <!-- <li v-if="!user_logged" class="nav-item"> -->
              <a v-if="!user_logged" href="/signup" class="dropdown-item"><strong>Register</strong></a>
              <!-- </li> -->

              <!-- <li v-if="user_logged && user_type === 'user'" class="nav-item"> -->
              <a v-if="user_logged && user_type === 'user'" href="/profile" class="dropdown-item"><strong>Profile</strong></a>
              <a v-if="user_logged && user_type === 'user'" href="/applied" class="dropdown-item"><strong>My Jobs</strong></a>
              <a v-if="user_logged && user_type === 'user'" href="/searches" class="dropdown-item"><strong>My Searches</strong></a>

              <!-- </li> -->

              <!-- <li v-if="user_logged && user_type === 'company'" class="nav-item"> -->
              <a v-if="user_logged && user_type === 'company'" href="/dashboard" class="dropdown-item"><strong>Employer Dashboard</strong></a>
              <!-- </li> -->

              <!-- <li v-if="!user_logged" class="nav-item"> -->
              <a v-if="!user_logged" href="/login" class="dropdown-item"><strong>Login</strong></a>
              <!-- </li> -->

              <!-- <li v-if="user_logged" class="nav-item"> -->
              <a v-if="user_logged" href="/logout" class="dropdown-item">
                <div class="dropdown-divider"></div>
                <strong>Logout</strong>
              </a>
              <!-- </li> -->
            </div>

          </li>
        </div>

      </ul>
    </div>
  </nav>

</div>

解决方案

Bootstrap has this built in already: See Menu Alignment. Just add the dropdown-menu-right class to the dropdown-menu div.

<div class="dropdown-menu dropdown-menu-right">

Working Example: (open Full Page)

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css" rel="stylesheet" />
<nav class="navbar navbar-expand-xl navbar-dark bg-primary">

  <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>

  <a class="navbar-brand" href="#">Company</a>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <form action="#" class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" id="keyword" name="keyword" :value='keyword' type="text" placeholder="Search for jobs" />
      <input class="form-control mr-sm-2" id="location" name="location" :value='location' type="text" placeholder="Location" />
      <button class="btn btn-secondary my-2 my-sm-0" type="submit">Find Jobs</button>
    </form>

    <ul class="navbar-nav mr-auto">
      <li class="nav-item">
        <a href="#" class="nav-link active">
          <strong>Post Job</strong>
        </a>
      </li>
      <li class="nav-item">
        <a href="#" class="nav-link">
          <strong>Register</strong>
        </a>
      </li>
      <li class="nav-item">
        <a href="#" class="nav-link">
          <strong>Profile</strong>
        </a>
      </li>
      <li class="nav-item">
        <a href="#" class="nav-link">
          <strong>My Jobs</strong>
        </a>
      </li>
      <li class="nav-item">
        <a href="#" class="nav-link">
          <strong>My Searches</strong>
        </a>
      </li>
      <li class="nav-item">
        <a href="#" class="nav-link">
          <strong>Employer Dashboard</strong>
        </a>
      </li>
      <li class="nav-item">
        <a href="#" class="nav-link">
          <strong>Login</strong>
        </a>
      </li>
      <li class="nav-item">
        <a href="#" class="nav-link">
          <strong>Logout</strong>
        </a>
      </li>
    </ul>

    <ul class="navbar-nav">
      <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">
          <strong>Account</strong>
        </a>
        <div class="dropdown-menu dropdown-menu-right" aria-labelledby="navbarDropdown">
          <a class="dropdown-item">
            <strong>Register</strong>
          </a>
          <a href="#" class="dropdown-item">
            <strong>Profile</strong>
          </a>
          <a href="#" class="dropdown-item">
            <strong>My Jobs</strong>
          </a>
          <a href="#" class="dropdown-item">
            <strong>My Searches</strong>
          </a>
          <a href="#" class="dropdown-item">
            <strong>Employer Dashboard</strong>
          </a>
          <a href="#" class="dropdown-item">
            <strong>Login</strong>
          </a>
          <a href="#" class="dropdown-item">
            <div class="dropdown-divider"></div>
            <strong>Logout</strong>
          </a>
        </div>
      </li>
    </ul>
  </div>
</nav>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/2.4.2/umd/popper.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.min.js"></script>

这篇关于Bootstrap 4:下拉菜单从屏幕右侧消失的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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