JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdn.rawgit.com/mrdoob/three.js/master/build/three.min.js"></script>

CSS

body {
	  margin: 0;
}

JavaScript

var scene, camera, renderer, mesh;

init();
animate();

function init() {

	scene = new THREE.Scene();
  
  camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 10 );
  camera.position.z = 1;
  
  var geometry = new THREE.BoxGeometry( 0.2, 0.2, 0.2 );
  var material = new THREE.MeshNormalMaterial();

  mesh = new THREE.Mesh( geometry, material );
  scene.add( mesh );
  
  renderer = new THREE.WebGLRenderer( { antialias: true } );
  renderer.setSize( window.innerWidth, window.innerHeight );
  renderer.setPixelRatio( window.devicePixelRatio );
  
  document.body.appendChild( renderer.domElement );
  
  window.addEventListener( 'resize', resize );
  
  console.log( 'width: ' + window.innerWidth, 'height: ' + window.innerHeight );

}
 
function resize() {
 
 	console.log( 'width: ' + window.innerWidth, 'height: ' + window.innerHeight );
  
  camera.aspect = window.innerWidth / window.innerHeight;
	camera.updateProjectionMatrix();
  
  renderer.setSize( window.innerWidth, window.innerHeight );
 
}
 
function animate() {
 
 	requestAnimationFrame( animate );
  
  mesh.rotation.x += 0.01;
  mesh.rotation.y += 0.02;

  renderer.render( scene, camera );

}