JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
<div>Some content</div>
</div>
<div class="push height200">Height: 200px;</div>
<div class="push height400">Height: 400px;</div>
<div class="footer">Footer</div>

CSS

* {
    margin: 0;
}
html, body {
    height: 100%;
}
.wrapper {
min-height: 100%;
height: auto !important;
height: 100%;
margin: 0 auto -40em;
}
.footer, .push {
height: 4em;
}
.height200
{
    height: 200px;
}
.height400
{
    height: 400px;
}