JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper" style="width:100%">
    <div id="left" style=""></div>
    <div id="right" style=""></div>
    
    <div style="clear:both"></div>
</div>

CSS

body{
    margin:0;
    padding:0;
}
#left{
    background-color:Blue;
    height:100px;
    float:left;
    width:200px;
}
#right{
    background-color:Aqua;
    height:100px;
    position:absolute; 
    top:0; 
    right:0; 
    left:200px;
}