Bootstrap 4 Columns
Bootstrap 4 Columns Behaviour
HTML
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.3/css/bootstrap.min.css">
<div class="row border-between">
<p class="col-sm-6">This column does not have a border, because it's a first child.</p>
<p class="col-sm-6">This column has a border to the left</p>
</div>
CSS
.border-between > [class*='col-']:before {
background: #e3e3e3;
bottom: 0;
content: " ";
left: 0;
position: absolute;
width: 1px;
top: 0;
}
.border-between > [class*='col-']:first-child:before {
display: none;
}