GraphQL by Example

About GraphQL by Example

More and more teams are choosing

GraphQL

instead of (or along with) REST for their web APIs. GraphQL queries give clients great flexibility in the way they request data from the server, preventing issues such _overfetching_ or _underfetching_ of data, and allowing multiple resources to be retrieved in a single request. In this course you'll learn how to use GraphQL both on the server side and in client applications through practical examples in the form of full-stack JavaScript applications. You will be introduced to all the main GraphQL concepts like _schema definition_ , _Queries_ , _Mutations_ , and _Subscriptions_ , as well as to solution to common requirements such as handling authentication/authorization and client-side caching. The examples use

Apollo Server

with _Node.js_ and _Express_ on the backend and React on the frontend, with _GraphQL-Request_ first, then

Apollo Client

as GraphQL clients. _GraphQL-WS_ is used for subscriptions. The aim however is not just to cover specific GraphQL libraries, but to give you a more general understanding of the underlying concepts. For instance, GraphQL client libraries are introduced only after learning how to write a simple client "by hand", to make sure you understand the GraphQL over HTTP format. This course assumes good knowledge of modern JavaScript, and ideally some familiarity with Node.js/Express and React.