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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

The GraphQL resolver can receive `obj,` `context,` and `info`.

GraphQL can execute a query without a type system.

The GraphQL server returns a result based on server implementation.

Each field in a GraphQL query can be considered a function or method. 

Which statement about GraphQL schema execution is correct?


Which statement about GraphQL schema execution is correct?

A variable on the root query type that isn’t used frequently.


A variable that holds the argument provided to the field in the GraphQL query.

A variable that stores contextual information, such as the current user or access to a database.


A variable that holds field-specific information relevant to the current query as well as the schema details.

When applicable, which `context` is used in the resolver?


When applicable, which <code>context</code> is used in the resolver?

Imagine a field in the GraphQL schema with `ID` as the scalar type. The client sends the value 6. What is the result that’s serialized on the server?


Imagine a field in the GraphQL schema with <code>ID</code> as the scalar type. The client sends the value 6. What is the result that’s serialized on the server?

Test your knowledge of GraphQL schema execution.


Quiz on Schema Execution

Test your knowledge of GraphQL schema execution.

Introduction

Getting to Know GraphQL

Queries

Mutations

Schemas and Types

Schema Validation

Schema Execution

Schema Introspection

GraphQL Best Practices

GraphQL Exam

Quiz on Schema Execution