Explore the evolution of JavaScript engines through an ambitious project to implement three different 3D rendering engines in JavaScript. Learn how to build a rasterizer, a ray-marcher, and a ray-tracer from scratch, gaining insights into the capabilities and limitations of modern JavaScript. Discover the lessons learned from attempting these complex implementations and understand how far JavaScript has come since the days of Netscape. This conference talk, presented at NDC Sydney 2024, challenges common perceptions about JavaScript's capabilities and demonstrates the language's potential for advanced graphics programming.