I'm trying to make a responsive block in the middle of my page using Bootstrap. But I cannot figure out why the columns dont respond to my bootstrap setup. What am I doing wrong?
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<div class="container">
<div class="row">
<div class="col-sm-12 col-md-10 mx-auto" style="background-color: blue; color: white;">
test column
</div>
</div>
</div>