<meta name="viewport" content="width=device-width, initial-scale=1">

<link rel="stylesheet" href="/static/lib/bootstrap/4.0.0/css/bootstrap.min.css">

<script src="/static/lib/jquery/3.3.1/jquery.min.js"></script>

<script src="/static/lib/bootstrap/4.0.0/js/bootstrap.min.js"></script>

<div class="container">

  <p>.float-right 类用于设置元素右浮动</p>

  <p>.float-left 设置元素左浮动</p>

<p>.clearfix 类用于清除浮动:</p> 

  <div class="clearfix">

    <span class="float-left">左浮动</span>

    <span class="float-right">右浮动</span>

  </div>

</div>

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