JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- 
  Bootstrap docs: https://getbootstrap.com/docs
-->

<div class="container">
  <div class="d-flex  flex-nowrap workflow_container">
    <div class="d-flex flex-column bd-highlight mb-3">
      <div class="p-2 bd-highlight">Flex item 1</div>
      <div class="p-2 bd-highlight">Flex item 2</div>
      <div class="p-2 bd-highlight">Flex item 3</div>
    </div>
    <div class="d-flex flex-column bd-highlight mb-3">
      <div class="p-2 bd-highlight">Flex item 1</div>
      <div class="p-2 bd-highlight">Flex item 2</div>
      <div class="p-2 bd-highlight">Flex item 3</div>
    </div>
    <div class="d-flex flex-column bd-highlight mb-3">
      <div class="p-2 bd-highlight">Flex item 1</div>
      <div class="p-2 bd-highlight">Flex item 2</div>
      <div class="p-2 bd-highlight">Flex item 3</div>
    </div>
    <div class="d-flex flex-column bd-highlight mb-3">
      <div class="p-2 bd-highlight">Flex item 1</div>
      <div class="p-2 bd-highlight">Flex item 2</div>
      <div class="p-2 bd-highlight">Flex item 3</div>
    </div>
    <div class="d-flex flex-column bd-highlight mb-3">
      <div class="p-2 bd-highlight">Flex item 1</div>
      <div class="p-2 bd-highlight">Flex item 2</div>
      <div class="p-2 bd-highlight">Flex item 3</div>
    </div>
    <div class="d-flex flex-column bd-highlight mb-3">
      <div class="p-2 bd-highlight">Flex item 1</div>
      <div class="p-2 bd-highlight">Flex item 2</div>
      <div class="p-2 bd-highlight">Flex item 3</div>
    </div>
    <div class="d-flex flex-column...

CSS

.mb-3 { flex-shrink: 0; } /* new */

.row {
  background: #f8f9fa;
  margin-top: 20px;
}

.col {
  border: solid 1px #6c757d;
  padding: 10px;
}

.workflow_container {
  height: 200px;
  overflow-y: hidden;
  overflow-x: auto;
}