JSFiddle - React, Tailwind, and code Playground

HTML

<div id="border-right"></div>

CSS

#border-right {
        right:0; 
        width: 71px; 
        height: 100%; 
        top: 30px; 
        bottom: 30px; 
        position:fixed; 
        background:rgba(255,255,255,.9);
        border-left:2px solid black;
        z-index:1;
    }