JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="search" name="search_fld"/>

<div id="display">
<div class="display_box">Luca</div>
<div class="display_box">David</div>
<div class="display_box">Mark</div>
<div class="display_box">...</div>
</div>

CSS

.display_box:hover
{
  background:#3b5998;
  color:#FFFFFF;
}

JavaScript

$("#search").keyup(function(e) 
    {
        if (e.keyCode == 40) 
        {  
            //navigate down
             
        }
        if(e.keyCode==38)
        {
            //navigate up
        }
      
    }