wtf is graphql-relay-js?

This library makes it easier for developers to build a GraphQL server that works seamlessly with React Relay, Facebook's framework for managing data in React applications. Think of it as a toolkit that handles the boring, repetitive parts of setting up a Relay-compatible backend. At its core, the library provides helper functions that solve three common problems when building a GraphQL server. First, it helps you create "connections", a standardized way to handle lists of data with pagination and filtering built in, so your frontend can easily request "give me the first 10 items" or "show me the next page." Second, it manages "global IDs," a way to uniquely identify any object in your system across different data types, which Relay needs to work properly. Third, it simplifies mutations, the operations that change data, by automatically handling the communication protocol between your client and server. You'd use this library if you're building a backend API that needs to serve a React app using Relay. Instead of writing boilerplate code to implement Relay's conventions by hand, you can import these helper functions and compose them into your server schema. For example, if you have a faction with a list of ships, the library gives you a one-liner to set up pagination on that ships list, rather than manually writing all the logic to handle cursors and slicing. The README includes concrete examples and links to the full test suite, showing exactly how to use each helper. The library is built with modern JavaScript (ES6) and includes type checking to catch bugs early, which means developers get helpful feedback while they're writing code.