<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Variable Width Columns Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<style>
.content { margin-bottom: 2px;
}
</style>
</head>
<body>
<div class="container">
<div class="row content" style="background:#dbdfe5">
<div class="col-sm-5 bg-info">col 1</div>
<div class="col-md-auto bg-warning">Variable width column content</div>
<div class="col-sm-3 bg-danger">col 2</div>
</div>
<div class="row content">
<div class="col bg-info">col 1</div>
<div class="col bg-warning">col 2</div>
<div class="col-md-auto bg-danger">Variable width column content</div>
</div>
</div>
</body>
</html>
