<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-primary" role="alert">
    A simple primary alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-secondary" role="alert">
    A simple secondary 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">
    A simple success alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-danger" role="alert">
    A simple danger alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-warning" role="alert">
    A simple warning alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-info" role="alert">
    A simple info alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-light" role="alert">
    A simple light alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-dark mb-0" role="alert">
    A simple dark alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
                                        

<div class="alert alert-default alert-dismissible" role="alert">
    <strong>Nothing important, </strong> This is just a simple alert message.
    <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
</div>
<div class="alert alert-success alert-dismissible" role="alert">
    <strong>Well done!</strong> You successfully read this important alert message.
    <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
</div>
<div class="alert alert-info alert-dismissible" role="alert">
    <strong>Heads up!</strong> This alert needs your attention, but it's not super important.
    <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
</div>
<div class="alert alert-warning alert-dismissible" role="alert">
    <strong>Warning!</strong> Better check yourself, you're not looking too good.
    <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
</div>
<div class="alert alert-danger alert-dismissible" role="alert">
    <strong>Oh snap!</strong> Change a few things up and try submitting again.
    <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
</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>