如何在 Bootstrap 4 中隐藏和替换 navbar-toggler-icon？

Question

如何隐藏和替换 Bootstrap 4 中的 navbar-toggler-icon？现在下面的代码只是将 'X' 放在汉堡菜单下面。

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

  <div class="collapse navbar-collapse" id="navbarsExampleDefault">

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

Answer 1

您的代码现在有 2 个切换器，但我不确定为什么。您只需要用 X..

替换正常的 navbar-toggler-icon

<nav class="navbar navbar-faded navbar-toggleable-md">
    <button class="navbar-toggler navbar-toggler-right py-2" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
       <span>X</span>
    </button>
    <a href="" class="navbar-brand">Brand</a>
    <div class="collapse navbar-collapse" id="navbarsExampleDefault">
        <ul class="navbar-nav">
            <li><a href="">Link</a></li>
        </ul>
    </div>
</nav>

编辑要在汉堡包切换器图标和关闭的 X 之间切换，您需要在 navbar-toggler 中同时拥有 X 和汉堡包图标。添加一些 CSS 来处理导航栏的 collapsed 状态。

.navbar-toggler>.close {
    display:inline;
}
.navbar-toggler.collapsed>.close, .navbar-toggler:not(.collapsed)>.navbar-toggler-icon {
    display:none;
}

http://www.codeply.com/go/fgHv33Q6UM

更新Bootstrap4.2

原来的 question/answer 是 Bootstrap 4 alpha。一旦 Bootstrap 4 处于测试阶段，navbar-toggleable-* 类更改为 navbar-expand-* 这会影响导航栏断点。这是 Bootstrap 4.2...

的更新示例

https://www.codeply.com/go/9AQ4AsYUph

Answer 2

如果一开始出现关闭按钮，试试这个

HTML

<nav class="navbar navbar-light bg-faded navbar-toggleable-md">
    <button class="navbar-toggler navbar-toggler-right collapsed" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
       <span class="my-1 mx-2 close">X</span>
       <span class="navbar-toggler-icon"></span>
    </button>
    <a href="" class="navbar-brand">Brand</a>
    <div class="collapse navbar-collapse" id="navbarsExampleDefault">
        <ul class="navbar-nav">
            <li class="nav-item"><a href="" class="nav-link">Link</a></li>
            <li class="nav-item"><a href="" class="nav-link">Link</a></li>
            <li class="nav-item"><a href="" class="nav-link">Link</a></li>
        </ul>
    </div>
</nav>

CSS

.navbar{
  button[aria-expanded="true"] > span.close {
    display: inline;
    color: #fff;
    opacity: 1;
  }

  button[aria-expanded="true"] > span.navbar-toggler-icon {
    display: none;
  }

  button[aria-expanded="false"] > span.close {
    display: none;
  }
}

如何在 Bootstrap 4 中隐藏和替换 navbar-toggler-icon？

How to hide and replace navbar-toggler-icon in Bootstrap 4?

css

html

bootstrap-4

twitter-bootstrap-4