JSFiddle - React, Tailwind, and code Playground
HTML
<div class="menubox">
<li>asddas</li>
<li>asdadssda ads</li>
<li>adas adsads sd</li>
</div>CSS
body{height:1000px}
.menubox{
width: 100%;
margin: auto;
height: 50px;
font-family: arial;
position: -webkit-sticky;
position: sticky;top: 0;
z-index: 1;
border: solid red px;
background-color:#42b3f4;
}
.menubox li{list-style:none;display:inline}