JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css">
<div class="row">
    <div class="col-md-4">
        <div class="mypanel">
        </div>
    </div>
    <div class="col-md-4">
        <div class="mypanel">
                <button type="button">Click</button>
        </div>
    </div>
    <div class="col-md-4">
        <div class="mypanel">

        </div>
    </div>
</div>

CSS

body {
  width: 100%;
}

.col-md-4 {
  border: 1px solid red;
  text-align: center;
  height: 200px;
}

.col-md-4 .mypanel {
   height: 100%;
}

.col-md-4:nth-child(2) .mypanel:after {
   content: '';
   height: 100%;
   display: inline-block;
   vertical-align: middle;
}

.col-md-4:nth-child(2) .mypanel button {
   vertical-align: middle;
   display: inline-block;
}