GraphQL

Overview

Design, build, and consume GraphQL APIs. This skill covers schema-first and code-first approaches, resolver patterns, real-time subscriptions, authentication, performance optimization with DataLoader, pagination, federation for microservices, and client-side consumption with Apollo Client.

Instructions

Step 1: Project Setup

Server (Apollo Server):

npm install @apollo/server graphql
npm install @apollo/server express cors  # With Express
npm install dataloader                    # For N+1 prevention