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 camera, scene, renderer;

init();
animate();

function init() {

    camera = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );

    scene = new THREE.Scene();
    
    var texture = new THREE.TextureLoader().load( 'https://threejs.org/examples/textures/UV_Grid_Sm.jpg' );

    var geometry = new THREE.PlaneBufferGeometry( 2, 2 );
    var material = new THREE.MeshBasicMaterial( { map: texture } );

    var mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );
    
    const spaceY = 100; // some additional space beneath the viewport

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize( window.innerWidth, window.innerHeight + spaceY );
    document.body.appendChild( renderer.domElement );
    
    // viewport configuration
    
    renderer.setViewport( 0, spaceY, window.innerWidth, window.innerHeight );

}

function animate() {

    requestAnimationFrame( animate );
    renderer.render( scene, camera );

}