3D with Svelte and Three.js

App.svelte

<script>
  import { onMount } from 'svelte';
  import { createScene } from "./scene";

  let el;

  onMount(() => {
    createScene(el)
  });
</script>

<canvas bind:this={el}></canvas>

global.css

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0
}

scene.js

import * as THREE from 'three';

const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
const geometry = new THREE.BoxGeometry();
const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
const cube = new THREE.Mesh(geometry, material);
let renderer;
scene.add(cube);
camera.position.z = 5;

const animate = () => {
  requestAnimationFrame(animate);
  cube.rotation.x += 0.01;
  cube.rotation.y += 0.01;
  renderer.render(scene, camera);
};

const resize = () => {
  renderer.setSize(window.innerWidth, window.innerHeight)
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();
};

export const createScene = (el) => {
  renderer = new THREE.WebGLRenderer({ antialias: true, canvas: el });
  resize();
  animate();
}

window.addEventListener('resize', resize);

import * as THREE from 'three';
should be
import * as THREE from 'Three';

Hello! This post was very helpful, thanks a lot.

I have a question, though, how can you access the window element from _scene.js?
When I try to do that, I get a Cannot read properties of undefined (reading 'addEventListener') error.

@AlvaroPata - For my personal website, I added this file to my project to allow three.js to work as shown as I also was having the same issue.

export const ssr = false;
export const prerender = true;

@Chase-William Thanks - forgotten why I created this gist... but I have a repo of Three.js with SvelteKit here:
https://github.com/jasonsturges/threejs-sveltekit