GraphQL for JS developers

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@glnnrys · glennreyes.com GraphQL for JS developers

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@glnnrys · glennreyes.com > whoami

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@glnnrys · glennreyes.com Glenn Reyes Independent Software Engineer

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@glnnrys · glennreyes.com Goals for today

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@glnnrys · glennreyes.com

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@glnnrys · glennreyes.com 💡 Learn

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@glnnrys · glennreyes.com 🤪 Fun

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@glnnrys · glennreyes.com 🏁 Success!!!

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@glnnrys · glennreyes.com Agenda 👨🏫 Intro GraphQL core concepts 👩💻 Exercise 💡 Review 🔁 Repeat!

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@glnnrys · glennreyes.com Agenda 👨🏫 Intro GraphQL core concepts 👩💻 Exercise 💡 Review 🍽 Lunch or ☕ Coffee 🔁 Repeat!

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@glnnrys · glennreyes.com What is GraphQL?

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@glnnrys · glennreyes.com Query Language for APIs

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@glnnrys · glennreyes.com Ask for what you want And get predictable results

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@glnnrys · glennreyes.com

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@glnnrys · glennreyes.com A friendly reminder GraphQL is bleeding edge technology

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@glnnrys · glennreyes.com www.graphql.org

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@glnnrys · glennreyes.com Describe your data

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Describe your data

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No content

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User

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Tweet Tweet

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User Tweet

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Describe your data User Tweet

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Describe your data User Tweet name email username bio age tweets message from

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@glnnrys · glennreyes.com Describe your Schema in a Type System

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@glnnrys · glennreyes.com type Tweet { id: ID! message: String! from: User } type User { name: String! email: String! bio: String age: Int tweets: [Tweet!]! username: String! }

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@glnnrys · glennreyes.com Int Float String Boolean ID

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@glnnrys · glennreyes.com type Query { getUser(email: String!): User! getTweets(username: String!): [Tweet!]! } type Mutation { createTweet: Tweet deleteTweet(id: ID!): Tweet updateTweet(id: ID!): Tweet }

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@glnnrys · glennreyes.com # GET something type Query { getUser(email: String!): User! getTweets(username: String!): [Tweet!]! } # DO something type Mutation { createTweet: Tweet deleteTweet(id: ID!): Tweet updateTweet(id: ID!): Tweet }

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@glnnrys · glennreyes.com # GET something type Query { # Get a user by the email adress getUser(email: String!): User! # Get tweets getTweets(username: String!): [Tweet!]! } # DO something type Mutation { createTweet: Tweet deleteTweet(id: ID!): Tweet updateTweet(id: ID!): Tweet }

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@glnnrys · glennreyes.com type Tweet { id: ID! message: String! from: User } type User { name: String! email: String! bio: String age: Int tweets: [Tweet!]! username: String! } type Query { getUser(email: String!): User! getTweets(username: String!): [Tweet!]! } type Mutation { createTweet: Tweet deleteTweet(id: ID!): Tweet updateTweet(id: ID!): Tweet }

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@glnnrys · glennreyes.com www.graphql.org

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@glnnrys · glennreyes.com Ask for what you want

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@glnnrys · glennreyes.com Ask for what you want And get predictable results

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@glnnrys · glennreyes.com Ask for what you want And get predictable results

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{ name twitter job expertise oss(type: "most-popular") elseIDo } { "name": "Glenn Reyes", "twitter": "@glnnrys", "job": "Independent Software Engineer", "expertise": ["React", "GraphQL"], "oss": ["graphpack", "react-countup"], "elseIDo": [ "Co-organize React Vienna", "Speak at conferences", "Give workshops" ] }

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{ name twitter job } { "name": "Glenn Reyes", "twitter": "@glnnrys", "job": "Independent Software Engineer" } GraphQL Query JSON

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@glnnrys · glennreyes.com What is GraphQL?

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@glnnrys · glennreyes.com Query Language for APIs

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@glnnrys · glennreyes.com Ask for what you want And get predictable results

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@glnnrys · glennreyes.com It's Language Agnostic

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@glnnrys · glennreyes.com

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@glnnrys · glennreyes.com Why GraphQL?

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@glnnrys · glennreyes.com GraphQL Architecture

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@glnnrys · glennreyes.com Servers Clients

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@glnnrys · glennreyes.com Makes managing data difficult in the frontend Servers Clients

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@glnnrys · glennreyes.com Servers Clients GraphQL

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@glnnrys · glennreyes.com Servers Clients GraphQL GraphQL handles data management for us

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@glnnrys · glennreyes.com Servers Clients GraphQL GraphQL handles data management for us delivers us data exactly as needed

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@glnnrys · glennreyes.com Servers Clients GraphQL GraphQL handles data management for us delivers us data exactly as needed let's us focus on the frontend

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@glnnrys · glennreyes.com What else?

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@glnnrys · glennreyes.com Tooling

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@glnnrys · glennreyes.com Query IDEs

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@glnnrys · glennreyes.com github.com/graphql/graphiql

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@glnnrys · glennreyes.com github.com/prisma/graphql-playground

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@glnnrys · glennreyes.com Automatic Documentation

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@glnnrys · glennreyes.com

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@glnnrys · glennreyes.com Query-driven schema design

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@glnnrys · glennreyes.com Design your schema based on how data is used not based on how it's stored