JSFiddle - React, Tailwind, and code Playground

by Alex Slepenkov

HTML

<div class="body">
<div id="circle_mas">

</div>
</div>

CSS

#circle_mas{
    position: absolute;
    bottom: 0;
    width:100%;
    height:20px;
    background:blue;
}
.body{
  height:2000px;
  position:relative;
}