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GraphQL is a query language for web APIs and a runtime for fulfilling queries with existing data. GraphQL gives clients the power to ask for precisely what they need, making it easy to evolve APIs with powerful developer tools.

This course is an introduction to GraphQL using the Node.js JavaScript runtime environment and Apollo Server. You’ll start with an introduction to GraphQL’s architecture and functions before exploring the structure of GraphQL data and learning to perform meaningful, complex queries. You’ll then learn how to update server data using mutations. Next, you’ll explore the GraphQL type system and schemas to set up a GraphQL server using Apollo Server. Once the server is set up, you’ll implement a full GraphQL application using Apollo and Node.js.

By the end of this course, you’ll have a rich understanding of GraphQL’s architecture and methodology and be prepared to deploy GraphQL applications to the web using Apollo and Node.js.

Getting Started with GraphQL using Node.js

yIt’s important to check which queries or operations a GraphQL server supports. To accommodate this functionality, GraphQL has an introspection system.

When we’ve designed the type system ourselves, we know which types are available. However, if we haven’t designed it, we could ask GraphQL by querying the `__schema`. The field is always open on the root type of a query. Let’s ask GraphQL what types are available:


Learn about GraphQL schema introspection.


Introduction to Schema Introspection

Learn about GraphQL schema introspection.

Introduction

Getting to Know GraphQL

Queries

Mutations

Schemas and Types

Schema Validation

Schema Execution

Schema Introspection

GraphQL Best Practices

GraphQL Exam

Introduction to Schema Introspection