Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Introduction to GraphQL (Reactathon)
Search
jnwng
March 20, 2018
Technology
0
160
Introduction to GraphQL (Reactathon)
Talk given at Reactathon 2018 3/20/2018
jnwng
March 20, 2018
Tweet
Share
More Decks by jnwng
See All by jnwng
Evolving the Graph
jnwng
1
260
An Introduction to GraphQL (ReactJS SF Bay Area)
jnwng
0
120
Providing Flexibility Through Constraint
jnwng
0
63
Introduction to GraphQL
jnwng
1
520
Going GraphQL First - ReactSF
jnwng
0
170
Going GraphQL First
jnwng
5
700
keeping up with javascript
jnwng
3
1k
Presentations 101
jnwng
1
220
SViOS Meetup: HTTP Live Streaming
jnwng
2
400
Other Decks in Technology
See All in Technology
エンジニア向け技術スタック情報
kauche
1
250
PostgreSQL 18 cancel request key長の変更とRailsへの関連
yahonda
0
120
解析の定理証明実践@Lean 4
dec9ue
0
170
VISITS_AIIoTビジネス共創ラボ登壇資料.pdf
iotcomjpadmin
0
160
“社内”だけで完結していた私が、AWS Community Builder になるまで
nagisa53
1
380
Clineを含めたAIエージェントを 大規模組織に導入し、投資対効果を考える / Introducing AI agents into your organization
i35_267
4
1.6k
初めてのAzure FunctionsをClaude Codeで作ってみた / My first Azure Functions using Claude Code
hideakiaoyagi
1
220
SalesforceArchitectGroupOsaka#20_CNX'25_Report
atomica7sei
0
150
Welcome to the LLM Club
koic
0
170
Yamla: Rustでつくるリアルタイム性を追求した機械学習基盤 / Yamla: A Rust-Based Machine Learning Platform Pursuing Real-Time Capabilities
lycorptech_jp
PRO
2
110
Amazon S3標準/ S3 Tables/S3 Express One Zoneを使ったログ分析
shigeruoda
3
470
M3 Expressiveの思想に迫る
chnotchy
0
100
Featured
See All Featured
Rebuilding a faster, lazier Slack
samanthasiow
82
9.1k
Faster Mobile Websites
deanohume
307
31k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
Gamification - CAS2011
davidbonilla
81
5.3k
The Cost Of JavaScript in 2023
addyosmani
51
8.4k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
Navigating Team Friction
lara
187
15k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.5k
Designing Experiences People Love
moore
142
24k
Code Reviewing Like a Champion
maltzj
524
40k
Transcript
An Introduction To GraphQL Reactathon, March 20, 2018
Jon Wong Frontend Infrastructure, Coursera @jnwng 2
Runtime ▪ Clients ▪ Servers ▪ Tools What We’re Covering
in GraphQL Language ▪ Schemas ▪ Queries 3
What is GraphQL? Taken straight from GraphQL.org
Describe your Data type Project { name: String tagline: String
contributors: [User] } 5
Ask for What You Want query { project(name: "GraphQL") {
tagline } } 6
Get Predictable Results query { project(name: "GraphQL") { tagline }
} 7 { "project": { "tagline": "A query language for APIs" } }
Schemas Describing possible data
Describe everything that is possible ▪ All possible data results
are described by the server. 9
Validation ▪ Every query is validated against the GraphQL schema
▪ No runtime errors for query documents 10
The GraphQL Schema gives us the basis of everything that
is possible when communicating to the server from the client. 11
Queries Reading your data
13 A simple query query { project(name: "GraphQL") { tagline
} } { "project": { "tagline": "A query language for APIs" } }
14 A simple query query { project(name: "GraphQL") { tagline
author } } { "project": { "tagline": "A query language for APIs", “author”: “jnwng” } }
Fragments fragment MyFancyFragment on MyResource { someField } 15 These
are required!
Spreading a fragment in a query query { someResource {
...MyFancyFragment } } 16 These two types should match
17 A typical React application
18 … broken down into components ...
19 A complex query
20 A complex query
21 A complex query query CoursePage { course(slug: “Machine Learning”)
{ title description ...University ...Instructor } }
22 ▪ Components can be more portable ▪ Components are
more self-sufficient. Every component can declare its own data requirements
GraphQL queries allow the client to declare exactly what it
needs, in the form that it needs it in. 23
Clients Managing your data
Clients make it easier to manage data Relay Apollo 25
Caching ▪ Clients provide advanced caching for GraphQL queries. 26
Caching query ListView { allBooks { id name } }
27 query DetailView ($id: ID) { bookById(id: $id) { name } }
Clients make adopting GraphQL in your application a breeze. 28
Servers Serving your data
Mapping types to resolvers 30 const schemaDefinition = ` type
Query { books: [Book] } type Book { title: String author: String } `; const resolvers = { Query: { books: () => fetch('https://api.com/books') }, };
Every field can be resolved separately. 31 const resolvers =
{ Query: { books: () => fetch('https://api.com/books') }, Book: { title: () => return ‘The book title’, author: () => fetch(‘https://api.com/authors’) } };
A single endpoint for data from anywhere { books {
title author } } 32
GraphQL servers are flexible 33 ▪ They can act as
proxies to existing data ▪ They can also act as the business logic layer itself
Tools Supercharging your data
GraphiQL 35
`eslint-plugin-graphql` 36 Catch invalid API calls at compile-time
`apollo-codegen` 37 Catch runtime errors at compile-time
GraphQL enables an entire ecosystem of tools to make developers
more effective. 38
▪ GraphQL makes it really simple to query lots of
data, no matter where it is. 39 In Summary
▪ Just like React, GraphQL can break down complexity into
composable, reusable pieces 40 In Summary
▪ GraphQL.org ▪ GraphQL.com ▪ https://launchpad.graphql.com/ new 41 How to
Get Started
THANKS! 42 @jnwng Presentation template by SlidesCarnival