How can you detect if a website uses Three.js?
Detecting whether a website uses Three.js involves looking for specific code and markers in the page source that indicate its presence.
Here’s a step-by-step guide on how to do it:
- Open the Page Source: Right-click on the webpage and select “View Page Source” or press
Ctrl+U
(Windows) orCmd+Option+U
(Mac) to open the page source code. - Search for Three.js Script: Look for the inclusion of the Three.js library by searching for keywords such as:
three.js
: Check if there’s a script tag that imports the Three.js library. For example,<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
THREE
: This is the primary object used in Three.js. Look for instances ofnew THREE
in the code that indicates the initialization of Three.js objects (e.g.,new THREE.Scene()
).
- Look for Three.js Related Code: Use
Ctrl+F
(Windows) orCmd+F
(Mac) to search for terms like:THREE.
: This typically indicates the use of Three.js methods and properties.data-engine
: Sometimes, Three.js is mentioned in data attributes. Search for something likedata-engine="three.js"
.window.__THREE__
: Some websites use a global variable to identify Three.js usage.
- Check for Canvas or WebGL: Look for
<canvas>
elements in the HTML which Three.js uses for rendering. You can search for<canvas
in the source code. - Inspect JavaScript Initialization: Sometimes, Three.js is initialized in JavaScript functions. Look for initialization code like:
const scene = new THREE.Scene();
- Look for Renderer Initialization: Search for code that initializes the WebGL renderer, often denoted by:
const renderer = new THREE.WebGLRenderer();
- Examine Event Listeners: Check if there are event listeners related to rendering or animation, often indicating Three.js usage, like:
requestAnimationFrame(render);
- Check for 3D Model Loading: Look for methods related to loading 3D models, such as:
THREE.GLTFLoader
THREE.OBJLoader