mswjs/headers-polyfill

This is a polyfill and transformation library for the Fetch API's `Headers` class, allowing consistent header manipulation across different environments. It provides a `Headers` class that works in non-browser contexts and includes utility functions to convert between `Headers` instances and various header formats like strings, objects, and arrays. The library is designed for developers working with HTTP requests in Node.js or other non-browser environments who need to handle headers in a standardized way.