Learn THREEJS with Real Code Examples

Include via npm (`npm install three`) or CDN

Import core classes (Scene, Camera, Renderer, etc.)

Create a scene and camera

Initialize WebGLRenderer and attach to canvas

Add objects, lights, and start animation loop

Modern browser with WebGL support

Node.js for local development

Bundler like Vite, Webpack, or Parcel

Access to 3D models and textures

Optional: WebXR-capable device

index.html - canvas and script

main.js - Three.js scene setup

models/ - 3D assets

textures/ - image files

utils/ - helper functions

npm install three

vite dev / webpack dev

npm run build

npx serve to host locally

Use Three.js editor for scene prototyping

Three.js is language-agnostic

Text overlays handled by JS/HTML

Localization independent of 3D rendering

Model/texture content may need translation

Number/date formatting in UI handled separately

Provide alternative text for canvas

Keyboard navigation for interactions

Consider motion sensitivity for animations

Screen readers interact with HTML UI

Three.js does not handle accessibility directly

Handled in HTML/CSS for overlays

Canvas displays 3D content

Responsive layout adjusts canvas size

Interaction handled via JS events

Three.js only manages rendering, not UI

Scene stores object hierarchy

Meshes maintain local transforms

Animation mixer updates object state

Camera controls user viewpoint

Renderer draws current state each frame

Load models and textures efficiently

Reuse geometries and materials

Minimize draw calls for performance

Use instancing for repeated objects

Optimize texture resolution and compression