Language · Language
GraphQL
Ask for exactly the data you need.
01Overview
GraphQL is a query language and runtime for APIs that lets clients request exactly the data they need. I use it with Node.js when multiple front-ends consume the same domain with different needs.
02Key concepts
What anyone working with it needs to understand
- 01
Schema & types
SDL, object types, inputs, enums and the schema as a contract.
- 02
Queries & mutations
Reading and writing data with a single endpoint.
- 03
Resolvers
How fields are resolved and composed from multiple sources.
- 04
N+1 & DataLoader
Batching and caching to avoid performance traps.
- 05
Subscriptions
Real-time updates over WebSockets.
- 06
Security
Query depth limits, complexity analysis and authorization per field.
03In practice
Part of my Node.js toolkit (Express, NestJS, GraphQL) and covered in depth in my “Node.js – The Complete Guide” certification.
