<div class="alert alert-primary" role="alert">A simple primary alert—check it out!</div>
<div class="alert alert-secondary" role="alert">A simple secondary alert—check it out!</div>
<div class="alert alert-success" role="alert">A simple success alert—check it out!</div>
<div class="alert alert-danger" role="alert">A simple danger alert—check it out!</div>
<div class="alert alert-warning" role="alert">A simple warning alert—check it out!</div>
<div class="alert alert-info" role="alert">A simple info alert—check it out!</div>
<div class="alert alert-light" role="alert">A simple light alert—check it out!</div>
<div class="alert alert-dark" role="alert">A simple dark alert—check it out!</div>

<div class="alert alert-success" role="alert">
  <h4 class="alert-heading font-weight-semi-bold">Well done!</h4>
  <p>Aww yeah, you successfully read this important alert message. This example text is going to run a bit longer so that you can see how spacing within an alert works with this kind of content.</p>
  <hr />
  <p class="mb-0">Whenever you need to, be sure to use margin utilities to keep things nice and tidy.</p>
</div>

<div class="alert alert-warning alert-dismissible fade show" role="alert">
  <strong>Holy guacamole!</strong> You should check in on some of those fields below.
  <button class="close" type="button" data-dismiss="alert" aria-label="Close"><span class="font-weight-light" aria-hidden="true">×</span></button>
</div>