JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content">
    Lorem ipsum dolor sit amet, consectetur adipisicing elit.
    Odit, facere saepe odio error necessitatibus fugiat officia
    enim iusto culpa mollitia voluptas ipsam voluptates ratione.
    Saepe odit tempore quos quia tenetur.
</div>

<div class="navigation"></div>

CSS

html, body {
    height: 100%;
    margin: 0;
}

.content {
    min-height: 100%;
    margin-right: 200px;
    
    background: #ddd;
}

.navigation {
    width: 200px;
    height: 100%;
    
    position: fixed;
    top: 0;    right: 0;
    
    background: #aaa;
}