bootstrap columns fix

Extend the content to the largest column in the grid

by builo

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="row">
    <div class="col">
      <div class="card">
        1 of 3
      </div>
    </div>
    <div class="col">
      <div class="card">
        2 of 3 <br/>
        2 of 3 <br/>
        2 of 3 <br/>
      </div>
    </div>
    <div class="col">
      <div class="card">
        3 of 3
      </div>
    </div>
  </div>  
</div>

CSS

.row {
  margin-top: 20px;
}

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

.card {
  background-color: #a0a0a0;
  height: 100%;
}