如何将引导按钮定位在导航选项卡的右侧？

Question

我正在使用Bootstrap的选项卡组件，无法将蓝色的登录按钮刷新到nav-tabs的右侧。我尝试了各种方法，但显然我不明白为什么它无法定位在我想要的位置。

这是我要做什么的图片：

HTML：

<section class="container">
  <ul class="nav nav-tabs pt-5">
    <li class="nav-item"><a class="nav-link active" href="#">Home</a></li>
    <li class="nav-item"><a class="nav-link" href="#">Data</a></li>
    <li class="nav-item">
      <button type="button" class="btn btn-primary ml-2">Log In</button>
    </li>
  </ul>
</section>

JSFIDDLE： https://jsfiddle.net/auov8ety/

Answer 1

您可以在包装按钮的ml-auto上使用类nav-item（有关更多信息，请阅读Bootstrap Spacing）

<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>

<section class="container">
  <ul class="nav nav-tabs pt-5">
    <li class="nav-item">
      <a class="nav-link active" href="#">Home</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#">Data</a>
    </li>
    <li class="nav-item ml-auto">
      <button type="button" class="btn btn-primary ml-2">Log In</button>
    </li>
  </ul>
</section>

Answer 2

只需将ml-auto赋予按钮

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css">

<section class="container">
  <ul class="nav nav-tabs pt-5">
    <li class="nav-item"><a class="nav-link active" href="#">Home</a></li>
    <li class="nav-item"><a class="nav-link" href="#">Data</a></li>
    <li class="nav-item ml-auto">
      <button type="button" class="btn btn-primary ml-2">Log In</button>
    </li>
  </ul>
</section>

提琴：https://jsfiddle.net/0fep392h/

Answer 3

我建议您将按钮与列表分开，并将flexbox与justify-content: space-between;一起使用

代码示例：

section.container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

   <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css">

   <section class="container pt-5">
      <ul class="nav nav-tabs">
        <li class="nav-item"><a class="nav-link active" href="#">Home</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Data</a></li>
      </ul>
      
      <button type="button" class="btn btn-primary ml-2">Log In</button>
    </section>