@fastly/js-compute is a JavaScript SDK and runtime for building Fastly Compute applications, enabling developers to create serverless edge applications that run on Fastly's global network. It provides a JavaScript API for handling HTTP requests and responses at the edge, along with tools for building, deploying, and managing these applications. This project is designed for developers looking to leverage Fastly's edge computing platform to run JavaScript code closer to end users for improved performance and reduced latency.