GraphQL Training Overview
This Introduction to GraphQL training teaches attendees GraphQL basics, both backend (server-side handling of GraphQL requests) and frontend (web UI using React). For the backend, this class uses Node.js, TypeScript, and Apollo Server. For the front end, the course uses React, TypeScript, and Apollo Client.
Location and Pricing
Accelebrate offers instructor-led enterprise training for groups of 3 or more online or at your site. Most Accelebrate classes can be flexibly scheduled for your group, including delivery in half-day segments across a week or set of weeks. To receive a customized proposal and price quote for private corporate training on-site or online, please contact us.
In addition, some courses are available as live, instructor-led training from one of our partners.
Objectives
- Master the GraphQL language and syntax
- Understand GraphQL schemas and the GraphQL SDL (schema definition language)
- Build backend services using GraphQL and Node.js
- Send queries and mutations to any GraphQL service
- Integrate GraphQL into a web-based frontend application
Prerequisites
All attendees must be familiar with
- Modern JavaScript and/or TypeScript
- The basics of HTTP and REST
- Node.js and asynchronous programming
- React
Outline
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Introduction
GraphQL: Query Language and a Type System
Unlike REST, GraphQL uses a Single Endpoint
The Simplest Type: Scalars
Add Comments to a Query
Types: Scalars, Objects, Lists
GraphQL Playground (Ctrl+space to show available fields; Cmd+click to GTD)
A GraphQL API Queried Using Plain HTTP POST (curl/fetch)
Schema Definition Language (SDL)
Building a GraphQL Server (typeDefs and resolvers)
Deeply Nested Field Selections
Query Arguments (e.g., task ID)
Aliases (e.g., the same field with different params)
Multiple Queries Within a single request
Argument/Parameter Defaults
Named Queries (typically use UpperCamelCase)
Mutations (e.g., createAccount)
Query Variables
Async Resolvers; Persisting Data to a Database
Custom Resolver Chains for Deep Nesting and Circular Relationships
Context, Headers, and Auth
Union Types and Inline Fragments
typename Field Implicit on all Types
GraphQL Interfaces
Building Frontend GraphQL Applications with React
- Apollo Client
- Tagged template literals and gql``
- Using variables to pass dynamic input
- Params received at `mutation()` level
- Using React hooks: useQuery and useMutation
- Refresh a query after a mutation
- Mutations for authentication
- Context in Apollo Server
- Fragments
Conclusion
Training Materials
All GraphQL training attendees receive comprehensive courseware.
Software Requirements
- Google Chrome and/or Firefox
- Other modern browsers as desired
- IDE/development environment of your choice
- Other free software and lab files that Accelebrate would specify, including Node.js
