bootstrap position
snippet in html

fix-bottom bootstrap

user4787

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

bootstrap position

user6191

<div class="position-static">...</div>
<div class="position-relative">...</div>
<div class="position-absolute">...</div>
<div class="position-fixed">...</div>
<div class="position-sticky">...</div>

bootstrap position fixed

user2141

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