JSFiddle - React, Tailwind, and code Playground

by victorxpp

HTML

<div class="Container">
    <div class="Const">  
    </div>
    <div class="Main">
    </div>
</div>

CSS

div.Container
{
   height: 250px;
   border: 2px solid #F00; 
   width: 600px;
    padding: 3px;
    overflow: auto;
    
    /* POSITION */
    position: relative;
    
}

div.Const
{
   border: 2px solid #078F8;
   width: 200px; 
    height: 200px;
    
    /* REMOVE FLOAT */
    /* float: left; */
    
    /* POSITION */
    position: fixed;
    left: 5;
}

div.Main
{
  border: 2px solid #00F;
  width: 800px;
   margin-left: 220px;
    height: 200px;
}