<span class="d-block bg-primary">Block</span>
<div class="d-inline bg-success">Inline</div>
<div class="d-inline bg-success">Inline</div>
<div class="d-inline-block bg-warning">
<h3>inline-block</h3>
Boot that strap!
</div>
<div class="d-inline-block bg-warning">
<h3>inline-block</h3>
Strap that boot!
</div>