HTML

bootstrap position class

<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>

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