JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="element">
        Content
    </div>
</div>

CSS

body, html{
    height:100%;
}
.container{
    background: green;
    height: 100%;
}

.element{
    background: gray;
    height:100%;
    width:100px;
}