Position

fixed top

Position an element at the top of the viewport, from edge to edge. Be sure you understand the ramifications of fixed position in your project; you may need to add additional CSS.

<div class="fixed-top">...</div>

fixed bottom

Position an element at the bottom of the viewport, from edge to edge. Be sure you understand the ramifications of fixed position in your project; you may need to add additional CSS.

<div class="fixed-bottom">...</div>

sticky top

Position an element at the top of the viewport, from edge to edge, but only after you scroll past it. The .sticky-toputility uses CSS's position: sticky, which isn't fully supported in all browsers.

<div class="sticky-top">...</div>

Responsive sticky top

Responsive variations also exist for .sticky-toputility.

<div class="sticky-sm-top">Stick to the top on viewports sized SM (small) or wider</div>
<div class="sticky-md-top">Stick to the top on viewports sized MD (medium) or wider</div>
<div class="sticky-lg-top">Stick to the top on viewports sized LG (large) or wider</div>
<div class="sticky-xl-top">Stick to the top on viewports sized XL (extra-large) or wider</div>