JSFiddle - React, Tailwind, and code Playground

HTML

<button id="save">
Save Screenshot
</button>

CSS

body {
	  margin: 0;
}
button {
	position: absolute;
}

JavaScript

import * as THREE from 'https://cdn.jsdelivr.net/npm/[email protected]/build/three.module.js';

import { EffectComposer } from 'https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/postprocessing/EffectComposer.js';
import { RenderPass } from 'https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/postprocessing/RenderPass.js';
import { ShaderPass } from 'https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/postprocessing/ShaderPass.js';

import { RGBShiftShader } from 'https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/shaders/RGBShiftShader.js';
import { DotScreenShader } from 'https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/shaders/DotScreenShader.js';

let camera, renderer, composer;
let object;

init();
animate();

function init() {

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

	//

	camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
	camera.position.z = 400;

	const scene = new THREE.Scene();
	scene.fog = new THREE.Fog( 0x000000, 1, 1000 );

	object = new THREE.Object3D();
	scene.add( object );

	const geometry = new THREE.SphereBufferGeometry( 1, 4, 4 );
	const material = new THREE.MeshPhongMaterial( { color: 0xffffff, flatShading: true } );

	for ( let i = 0; i < 100; i ++ ) {

		const mesh = new THREE.Mesh( geometry, material );
		mesh.position.set( Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5 ).normalize();
		mesh.position.multiplyScalar( Math.random() * 400 );
		mesh.rotation.set( Math.random() * 2, Math.random() * 2, Math.random() * 2 );
		mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 50;
		object.add( mesh );

	}

	scene.add( new THREE.AmbientLight( 0x222222 ) );

	const light = new THREE.DirectionalLight( 0xffffff );
	light.position.set( 1, 1, 1 );
	scene.add( light );

	//...