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;
var geometry, material, mesh;

init();
animate();

function init() {

    camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 10 );
    camera.position.z = 1;

    scene = new THREE.Scene();

    geometry = new THREE.PlaneBufferGeometry();
		
		var color = new THREE.Color();
		var colors = [];
		
		for ( var i = 0; i < geometry.attributes.position.count; i ++ ) {
		
			color.set( Math.random() * 0xffffff );
			colors.push( color.r, color.g, color.b );
		
		}
		
		// geometry.addAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
			
    material = new THREE.MeshBasicMaterial( { vertexColors: THREE.VertexColors } );
		material.defaultAttributeValues = {
			color: [ 0, 0, 1 ] // blue
		};

    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );

}

function animate() {

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

}