JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<div class="bs-example">
  <div class="dropdown">
    <a id="dLabel" data-target="#" href="http://example.com" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
        Dropdown trigger
        <span class="caret"></span>
      </a>

    <ul class="dropdown-menu" aria-labelledby="dLabel">
      <li>a</li>
      <li>b</li>
      <li>c</li>
      <li>d</li>
    </ul>
  </div>
</div>
<div class="bs-example1">
  <ul class="list-unstyled list-inline rates-nav">
    <li class="dropdown">
      <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li role="separator" class="divider"></li>
        <li><a href="#">Separated link</a></li>
        <li role="separator" class="divider"></li>
        <li><a href="#">One more separated link</a></li>
      </ul>
    </li>
     <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">Separated link</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">One more separated link</a></li>
          </ul>
        </li>
         <li class="dropdown">
          <a href="#" class="dropdown-toggle"...

CSS

.bs-example,
.bs-example1 {
  height: 50px;
  border: 1px solid black;
  overflow-y: hidden;
  overflow-x: auto;
  white-space: nowrap;
}

.bs-example .dropdown {
  position: absolute;
}
.bs-example1 .rates-nav {
  position:absolute;
}