JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="container">
  <div class="row">
    <div class="col-lg-12">
      <table class="table table-bordered table-striped">
        <thead style="background:#e00000;">
          <tr>
            <th>Class</th>
            <th>描述</th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <th scope="row">
              <code>.active</code>
            </th>
            <td>鼠标悬停在行或单元格上时所设置的颜色</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.success</code>
            </th>
            <td>标识成功或积极的动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.info</code>
            </th>
            <td>标识普通的提示信息或动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.warning</code>
            </th>
            <td>标识警告或需要用户注意</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.danger</code>
            </th>
            <td>标识危险或潜在的带来负面影响的动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.danger</code>
            </th>
            <td>标识危险或潜在的带来负面影响的动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.danger</code>
            </th>
            <td>标识危险或潜在的带来负面影响的动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.danger</code>
            </th>
            <td>标识危险或潜在的带来负面影响的动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.danger</code>
            </th>
            <td>标识危险或潜在的带来负面影响的动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.danger</code>
            </th>
            <td>标识危险或潜在的带来负面影响的动作</td>
          </tr>
          <tr>
            <th scope="row">
              <code>.danger</code>
            </th>
           ...

CSS

thead {
  position: -webkit-sticky;
  position: -moz-sticky;
  position: -ms-sticky;
  position: -o-sticky;
  position: sticky;
  top: 0;
  z-index: 10;
  display: table;
  width: 100%;
}
tbody {
    display: table;
    width: 100%;
}