<div class="alert alert-primary" role="alert">
    This is a primary alert—check it out!
</div>

<div class="alert alert-secondary" role="alert">
    This is a secondary alert—check it out!
</div>

<div class="alert alert-success" role="alert">
    This is a success alert—check it out!
</div>

<div class="alert alert-danger" role="alert">
    This is a danger alert—check it out!
</div>

<div class="alert alert-warning" role="alert">
    This is a warning alert—check it out!
</div>

<div class="alert alert-info" role="alert">
    This is a info alert—check it out!
</div>

<div class="alert alert-light" role="alert">
    This is a light alert—check it out!
</div>

<div class="alert alert-dark" role="alert">
    This is a dark alert—check it out!
</div>

<div class="alert alert-primary" role="alert">
    This is a primary alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>

<div class="alert alert-success" role="alert">
    <h4 class="alert-heading">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 type="button" class="close" data-dismiss="alert" aria-label="Close">
        <span aria-hidden="true">×</span>
    </button>
</div>