JSFiddle - React, Tailwind, and code Playground

HTML

<div class="a"></div>
<div class="b"></div>

CSS

body{
  height: 2000px;
}

div{
  background: blue;
}

.a{
  height: 102px;
}

.b{
  height: 37px;
  position: sticky;
  top: 0;
}