twitter-bootstrap - Bootstrap 4 Navbar 在左侧对齐 Logo 中心和切换图标

Question

我想让标志在导航栏的左侧居中和链接，当它们在小型设备中折叠时，切换按钮应该出现在左侧，这里出现在右侧并且标志应该固定(没有折叠)

<nav class="navbar navbar-expand-sm navbar-light bg-light">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav">
        <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarNav">
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricing</a>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
  </div>
</nav>

Answer 1

Bootstrap 4 Navbar 使用 flexbox，因此无需额外的 CSS 即可实现。您将需要一个空白的 spacer div 来使 Logo 居中。

<nav class="navbar navbar-expand-lg navbar-light bg-light">
    <div class="collapse navbar-collapse w-100 order-1 order-lg-0" id="navbarNav">
        <ul class="navbar-nav">
            <li class="nav-item active">
                <a class="nav-link" href="#">Home</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Features</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Pricing</a>
            </li>
            <li class="nav-item">
                <a class="nav-link disabled" href="#">Disabled</a>
            </li>
        </ul>
    </div>
    <div class="d-flex w-100 order-0">
        <div class="w-100">
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav">
                <span class="navbar-toggler-icon"></span>
            </button>
        </div>
        <a class="navbar-brand text-center w-100" href="#">Navbar</a>
        <span class="w-100"></span>
    </div>
    <span class="w-100"></span>
</nav>

左切换开关，品牌中心:
https://www.codeply.com/go/VfuMAtIoXi

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