QuickJS

QuickJS is a small, embeddable JavaScript engine developed by Fabrice Bellard. It is designed to be fast and efficient, making it suitable for a variety of applications where a full JavaScript runtime might be too heavy. QuickJS supports a significant portion of the ECMAScript standard, including modern features like classes, modules, and async/await. It also includes support for JSX, a syntax extension for JavaScript often used with React.

One of the key features of QuickJS is its small footprint. The entire engine, including its standard library, can be compiled into a binary of just a few hundred kilobytes. This makes it ideal for embedded systems, IoT devices, or as a scripting language within larger applications where resource constraints are a concern. Despite its size, QuickJS is surprisingly performant, often outperforming other JavaScript engines in benchmarks.

QuickJS can be used in several ways. It can be embedded directly into C or C++ applications, allowing developers to add scripting capabilities to their software. It also comes with a command-line interpreter, which can be used for running JavaScript scripts or for interactive development. Furthermore, QuickJS can be compiled to WebAssembly, enabling it to run in web browsers or other WebAssembly-compatible environments. Its design emphasizes simplicity and ease of integration, making it a versatile tool for developers looking for a lightweight and powerful JavaScript engine.