如何在Navbar中制作Bootstrap 4全宽下拉菜单? [英] How to make a Bootstrap 4 full width dropdown in Navbar?

问题描述

我正在尝试制作一个看起来像折叠项的全角下拉菜单-网站现在经常使用的全角可折叠导航.但是我不知道该怎么做.

I'm trying to make a full-width dropdown that looks like a collapse item - the full-width collapsable navigations that websites now use often. But I cannot figure out how to do it.

我尝试向其中添加Bootstrap的折叠插件，但这没用.将多个.navbar-collapse类添加到导航栏是否被认为是安全的做法?

I've tried adding Bootstrap's collapse plugin to it, but that didn't work. Is it considered safe practice to add more than one .navbar-collapse class to a navigation bar?

还是我的方法应该只是编辑Bootstrap的下拉菜单?如果是这样，我应该怎么做?

Or should my approach be just editing Bootstrap's dropdown? And if so, how should I do it?

这是一张图片，向您确切显示我要实现的目标:

Here's an image to show you exactly what I'm trying to achieve:

这是我的代码的概要，请以全角查看以下内容:

And here's the outline of my code, please view snipped in full width:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<nav class="navbar navbar-expand-lg">
  <a class="navbar-brand" href="#" style="color: red;">LOGO GOES HERE</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">
      <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">
          Dropdown
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <div class="dropdown-divider"></div>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
  </div>
</nav>

推荐答案

在dropdown-menu上使用w-100(宽度:100％)，并确保父级.dropdown 是position-static允许菜单扩展到全宽...

Use w-100 (width:100%) on the dropdown-menu, and make sure the parent .dropdown is position-static to allow the menu to expand to full width...

<nav class="navbar navbar-expand-lg">
    <a class="navbar-brand" href="#" style="color: red;">LOGO GOES HERE</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">
            <li class="nav-item dropdown position-static">
                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Dropdown
        </a>
                <div class="dropdown-menu w-100" aria-labelledby="navbarDropdown">
                    <a class="dropdown-item" href="#">Action</a>
                    <a class="dropdown-item" href="#">Another action</a>
                    <div class="dropdown-divider"></div>
                    <a class="dropdown-item" href="#">Something else here</a>
                </div>
            </li>
        </ul>
    </div>
</nav>

https://www.codeply.com/go/0QHWWNsMyI

或者，在CSS中设置最小宽度:

Alternative, set min-width in CSS:

https://www.codeply.com/go/fClz4WpC8u/bootstrap-4-dropdown-width

复杂的大型菜单"示例

这篇关于如何在Navbar中制作Bootstrap 4全宽下拉菜单?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！