WebGPU for Frontend Devs: A Practical First Project

Most WebGPU tutorials go deep into theory or jump straight into 3D engines. If you are a frontend developer like me, that feels like learning to drive by reading the car manual. This article is the opposite. We will build something visual, step by step, with zero GPU knowledge. By the end, you will have a real-time animated gradient running on your GPU — and you will understand every line. What is WebGPU (in 30 seconds) WebGPU lets your JavaScript talk directly to the GPU. Think about it like this: Imagine you need to paint a wall. Your CPU is one very talented painter — fast, smart, and precise. But it paints one brushstroke at a time. Your GPU is a team of 5,000 painters. Each one can only do simple strokes, but they all paint at the same time. Give them a wall with 2 million pixels? They split the work and finish in one pass. WebGPU is the phone call that lets your browser hire that team of painters. Browser support (March 2026) Before we start — can your browser do this? Browser St