JSFiddle - React, Tailwind, and code Playground

CSS

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

JavaScript

import * as THREE from "https://threejs.org/build/three.module.js";
import { Line2 } from "https://threejs.org/examples/jsm/lines/Line2.js";
import { LineMaterial } from "https://threejs.org/examples/jsm/lines/LineMaterial.js";
import { LineGeometry } from "https://threejs.org/examples/jsm/lines/LineGeometry.js";

var renderer, scene, camera;

var line;
var MAX_POINTS = 500;
var drawCount = 0;

init();
animate();

function init() {

	// info
	var info = document.createElement( 'div' );
	info.style.position = 'absolute';
	info.style.top = '30px';
	info.style.width = '100%';
	info.style.textAlign = 'center';
	info.style.color = '#fff';
	info.style.fontWeight = 'bold';
	info.style.backgroundColor = 'transparent';
	info.style.zIndex = '1';
	info.style.fontFamily = 'Monospace';
	info.innerHTML = "three.js animataed line using BufferGeometry";
	document.body.appendChild( info );

	// renderer
	renderer = new THREE.WebGLRenderer();
	renderer.setPixelRatio( window.devicePixelRatio );
	renderer.setSize( window.innerWidth, window.innerHeight );
	document.body.appendChild( renderer.domElement );

	// scene
	scene = new THREE.Scene();

	// camera
	camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
	camera.position.set( 0, 0, 1000 );

	// geometry
	var geometry = new LineGeometry();

	// attributes
	var positions = new Float32Array( MAX_POINTS * 3 ); // 3 vertices per point
	geometry.setPositions( positions);


	// material
	var material = new LineMaterial( { 
		color: 0xff0000, 
		linewidth: 1,
		dashSize: 2,
		gapSize: 4,
		scale: 1,
		dashed: true
  
  } );
	material.resolution.set( window.innerWidth, window.innerHeight );
  material.defines.USE_DASH = ""; 

	// line
	line = new Line2( geometry,  material );
	scene.add( line );

	// update positions
	updatePositions();

}

// update positions
function updatePositions() {

	//var positions = line.geometry.attributes.position.array;
  var positions =[ ];
	var x = 0;
  var y = 0;
 ...