JS Virtual Lab Library is a lightweight virtual laboratory library built using JavaScript and HTML5 Canvas, designed to simplify the development of interactive physics simulations. The library provides a flexible and efficient framework that enables users to construct virtual experiments with minimal overhead, making it suitable for rapid prototyping as well as educational applications. By emphasizing simplicity, performance, and modularity, JS Virtual Lab Library allows developers and educators to focus on conceptual modeling and learning objectives, while offering an accessible foundation for creating physics-based simulations in web environments.