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Introduction to GraphQL

Welcome to our comprehensive guide on GraphQL! This book will take you from the basics to advanced concepts of GraphQL, helping you build robust and efficient APIs.

What is GraphQL?​

GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. It provides a complete and understandable description of the data in your API, gives clients the power to ask for exactly what they need and nothing more, makes it easier to evolve APIs over time, and enables powerful developer tools.

What You'll Learn​

In this book, you'll learn:

  • Core concepts of GraphQL
  • Schema design and best practices
  • Setting up a GraphQL server
  • Working with resolvers and context
  • Authentication and authorization
  • Error handling
  • Real-time updates with subscriptions
  • Testing and tooling
  • Deployment strategies
  • Integration with various frameworks and tools

Prerequisites​

To get the most out of this book, you should have:

  • Basic understanding of JavaScript/TypeScript
  • Familiarity with REST APIs
  • Node.js installed (version 18.0 or above)
  • A code editor of your choice

How to Use This Book​

Each chapter builds upon the previous ones, so we recommend going through them in order. The book includes practical examples and exercises to help you apply what you learn.

Let's begin our journey into the world of GraphQL!

Getting Started​

Get started by creating a new site.

Or try Docusaurus immediately with docusaurus.new.

What you'll need​

  • Node.js version 18.0 or above:
    • When installing Node.js, you are recommended to check all checkboxes related to dependencies.

Generate a new site​

Generate a new Docusaurus site using the classic template.

The classic template will automatically be added to your project after you run the command:

npm init docusaurus@latest my-website classic

You can type this command into Command Prompt, Powershell, Terminal, or any other integrated terminal of your code editor.

The command also installs all necessary dependencies you need to run Docusaurus.

Start your site​

Run the development server:

cd my-website
npm run start

The cd command changes the directory you're working with. In order to work with your newly created Docusaurus site, you'll need to navigate the terminal there.

The npm run start command builds your website locally and serves it through a development server, ready for you to view at http://localhost:3000/.

Open docs/intro.md (this page) and edit some lines: the site reloads automatically and displays your changes.