JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgit.com/mrdoob/three.js/dev/build/three.js"></script>

CSS

body {
	background-color: #000;
	margin: 0px;
	overflow: hidden;
}

JavaScript

var foo = new THREE.BoxBufferGeometry();
console.log( "every:", foo.attributes.position.array.every(pos => isNaN(pos)) );

var foo = new THREE.BoxBufferGeometry( 10 );
console.log( "some:", foo.attributes.position.array.some(pos => isNaN(pos)) );

var foo = new THREE.BoxBufferGeometry( 10, 20 );
console.log( "some:", foo.attributes.position.array.some(pos => isNaN(pos)) );

var foo = new THREE.BoxBufferGeometry( 10, 20, 30 );
console.log( "none:", foo.attributes.position.array.every(pos => ! isNaN(pos)) );