Button
Equivalent to a "Contained Button" in material components. There is nothing special about it.
Demo
Code
<div class="mb-3">
<button class="btn me-2">Press Me</button>
<a href="#" class="btn btn-outline-success me-2">Press Me</a>
<button class="btn" disabled>Press Me</button>
</div>
<div class="mb-3">
<button class="btn btn-sm btn-danger">Smol Danger Button</button>
<button class="btn btn-sm btn-outline-primary">Smol Primary Button</button>
</div>
<div class="mb-3">
<button class="btn btn-lg">Lorg Button</button>
</div>