JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="header"></div>
    <div id="body"></div>
    <div id="footer"></div>
</div>

CSS

#container {
    height: 100%;
    width: 100%;
    background: green;
    position: absolute;
}
#header, #footer {
    height: 100px;
    width: 100%;
    background: red;
}
#body {
    height: 100%;
    width: 100%;
    background: blue;
}