Isomorphic Fetch API

Isomorphic-fetch is a JavaScript library that provides the WHATWG Fetch API for both Node.js and browser environments. Its current stable version is 3.0.0. The package operates as a polyfill, meaning it modifies the global scope to add the `fetch` function and related constructs like `Headers`, `Request`, and `Response`. For server-side operations, it leverages `node-fetch`, while for client-side, it's built on GitHub's WHATWG Fetch polyfill. Its release cadence has slowed, with the last major version (v3.0.0) released significantly after previous iterations, suggesting a maintenance rather than active development phase. A key differentiator is its polyfill approach, which automatically makes `fetch` available globally, contrasting with 'ponyfill' alternatives like `fetch-ponyfill` or `cross-fetch` that avoid global pollution. This design choice aims for API consistency but requires users to be aware of global modifications.