October 15, 2025

How to Install Three.js in 2025?

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Three.js continues to be a powerful 3D library for the web, allowing developers of all skill levels to create stunning graphics and animations. As of 2025, installing and setting up Three.js has become even more streamlined. In this guide, we’ll walk through the steps necessary to get Three.js up and running on your project. Whether you’re a budding enthusiast or an experienced developer, these instructions will help you harness the capabilities of this popular library.

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Step 1: Setting Up Your Environment #

Before you start, ensure that your development environment is ready:

Node.js and npm: Make sure you have the latest versions of Node.js and npm installed on your system. You can check this by running node -v and npm -v in your terminal. To install or update, visit Node.js official site.
A Code Editor: Utilize a modern code editor such as Visual Studio Code or Atom for an optimized coding experience.

Step 2: Create a New Project #

Create a new directory for your project and initialize it with npm:

mkdir my-threejs-project
cd my-threejs-project
npm init -y

Step 3: Install Three.js #

Install Three.js using npm, which is the most efficient way to manage dependencies:

npm install three

This command will download and install the latest version of Three.js into your project’s node_modules directory.

Step 4: Set Up the Basic Scene #

Create an index.html file and start setting up your basic scene:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Three.js Scene</title>
    <style>
      body { margin: 0; }
      canvas { display: block; }
    </style>
</head>
<body>
    <script type="module">
        import * as THREE from './node_modules/three/build/three.module.js';

        const scene = new THREE.Scene();
        const camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);

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

        const geometry = new THREE.BoxGeometry();
        const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
        const cube = new THREE.Mesh(geometry, material);
        scene.add(cube);

        camera.position.z = 5;

        const animate = function () {
            requestAnimationFrame(animate);

            cube.rotation.x += 0.01;
            cube.rotation.y += 0.01;

            renderer.render(scene, camera);
        };

        animate();
    </script>
</body>
</html>

Step 5: Run Your Project #

To see your Three.js application in action, you can use a simple static server. Here’s how to do it using http-server, an easy-to-use command line HTTP server:

npm install -g http-server
http-server

Open your web browser and navigate to http://localhost:8080. You should see a rotating green cube, indicating that Three.js is set up and ready for your 3D creations.

Conclusion #

Setting up Three.js in 2025 remains as accessible as ever, ensuring developers can easily jump into creating immersive web experiences. As you expand your mastery in using Three.js, consider exploring advanced topics like JavaScript build optimization, utilizing frameworks as seen in JavaScript framework applications, or even creating tools like a JavaScript stock chart.

With this setup, you are ready to dive deeper into 3D web development and take advantage of the rich capabilities Three.js offers.

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