bootstrap row-col

by hojondo

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">col</div>
            <div class="col">col</div>
            <div class="w-100 d-none d-md-block"></div>
            <div class="col">col</div>
            <div class="col">col</div>
            <div class="col">col</div>
            <div class="col">col</div>
   </div>
   <div class="row">
            <div class="col-12 col-md-8">.col-12 .col-md-8</div>
            <div class="col-6 col-md-4 offset-6 offset-md-0">.col-6 .col-md-4</div>
   </div>
</div>

CSS

.row {
  background: #f8f9fa;
  border: solid 1px #eee;
  margin-top: 20px;
}

.col-4 {
  border: solid 1px #6c757d;
  padding: 10px;
}