JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
    </head>
    <body>
            <div id="leftrightparent">
                <div id="right">
                    right
                </div>    
                <div id="left">
                    left
                </div>
            </div>
    </body>
</html>

CSS

#left {
  background-color:#ff0000;
}
#right {
  width:100px;
  float: right;
  background-color:#00FF00;
}
#leftrightparent {
}