JSFiddle - React, Tailwind, and code Playground

HTML

<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r67/three.min.js"></script>   
  </head>
  <body>
    <div id="canvas">
    
    </div>
    <script>
    var geometry = new THREE.Geometry()
    var entity ={
    	'vertices' : [
    {
        "x": 4.857024508564912,
        "y": 6.807564714977122
    },
    {
        "x": 8.816292322934935,
        "y": 6.807564714977122
    },
    {
        "x": 8.816292322934935,
        "y": 5.51136731706687,
        "bulge": -0.414213562373095
    },
    {
        "x": 7.816292322934935,
        "y": 4.51136731706687
    },
    {
        "x": 4.357024508564912,
        "y": 4.51136731706687
    },
    {
        "x": 4.357024508564912,
        "y": 6.307564714977122,
        "bulge": -0.414213562373095
    }
]
    } 
    	function init(){
      	var scene = new THREE.Scene()
      	        var camera = new THREE.PerspectiveCamera(45,window.innerWidth/window.innerHeight,1,1000)
      	        var renderer = new THREE.WebGLRenderer()
      	        drawLine(entity,null)
      	        let pts = []
      	        geometry.vertices.forEach(v => {
      	            pts.push(v);
      	        })
      	        
      	        let curve = new THREE.CatmullRomCurve3( pts );
      	        curve.closed = true;
      	        let curveGeometry = new THREE.Geometry();
      	        curveGeometry.vertices = curve.getPoints(geometry.vertices.length)
      	        let curveMaterial = new THREE.LineBasicMaterial({color: "white"});
      	        let curveLine = new THREE.Line(curveGeometry, curveMaterial);
      	        scene.add(curveLine)
      	         document.querySelector('#canvas').append(renderer.domElement)
      	                 renderer.render(scene,camera) 
      }
      
      function drawLine(entity, data) {
    
        let material, lineType, vertex, startPoint, endPoint, bulgeGeometry,
        bulge, i, line;
    // create geometry
		
    for (i = 0; i < entity.vertices.length; i++) {
 ...