JSFiddle - React, Tailwind, and code Playground

HTML

<div class="d1">
    <div class="d2">
        <div class="d3">
            hi
        </div>
    </div>
</div>

CSS

html,body{
     height: 100%;
}

div{
  min-height: 100%;
  height: auto !important;
  height: 100%;
}

.d1{
    background: #3cc;
}

.d2{
    background: #ddd;
}

.d3{
  background: #c00;    
}