JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="fill">
  </div>
</div>

CSS

body{
    padding: 0px;
    margin: 0px;
}

.fill{}
.container{
    background-color: magenta;
}

JavaScript

function setHeight(){
    var winHeight = $(window).innerHeight();
    $(".container").css("height", winHeight + "px");
    $(".fill").css("height", winHeight + "px");
}

$( window ).resize(function() {
    setHeight();
});

setHeight();