Relay components are integral to the development of modern React applications, particularly when dealing with complex data interactions through GraphQL. Developed by Facebook, Relay is a JavaScript framework that simplifies the process of fetching and managing data, ensuring that React components stay in sync with the underlying data. Relay components serve as the bridge between React’s declarative rendering model and GraphQL’s efficient data-fetching capabilities, making them essential for developers looking to create data-driven, highly interactive applications.
What Are Relay Components? Relay components are React components that integrate with the Relay framework to handle GraphQL queries, mutations, and subscriptions. They allow developers to define how data is fetched, managed, and rendered in their applications, abstracting much of the complexity involved in working directly with GraphQL. By using these components, developers can avoid the manual management of state and handle data fetching, caching, and re-fetching automatically. There are several key components within the Relay ecosystem, each designed to handle different parts of the data flow within an application：