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
140
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
230
An Introduction to GraphQL (ReactJS SF Bay Area)
jnwng
0
110
Providing Flexibility Through Constraint
jnwng
0
52
Introduction to GraphQL
jnwng
1
460
Going GraphQL First - ReactSF
jnwng
0
160
Going GraphQL First
jnwng
5
620
keeping up with javascript
jnwng
3
990
Presentations 101
jnwng
1
220
SViOS Meetup: HTTP Live Streaming
jnwng
2
380
Other Decks in Technology
See All in Technology
Oracle GoldenGate 23ai 導入Tips
oracle4engineer
PRO
1
230
SQLによるオブザーバビリティの進化とClickHouseの実力
mikimatsumoto
0
160
Pythonを活用したLLMによる構造的データ生成の手法と実践
brainpadpr
3
270
Develop to Survive - YAPC::Hakodate 2024 Keynote
moznion
4
1.4k
【インフラエンジニアbooks】30分でわかる「AWS継続的セキュリティ実践ガイド」
hssh2_bin
4
1.5k
「ばん・さく・つき・たー!」にならないためにSHIROBAKOから 学んだこと
ysknsid25
3
600
【shownet.conf_】AI技術とUX監視の応用でShowNetの基盤を支えるモニタリングシステム
shownet
PRO
0
330
第45回 MLOps 勉強会 - ML Test Score を用いた機械学習システムの定量的なアセスメント
masatakashiwagi
3
280
Oracle Database 23ai 新機能#4 Application Continuity
oracle4engineer
PRO
0
110
LINEヤフー新卒採用 コーディングテスト解説 実装問題編
lycorp_recruit_jp
1
12k
XPを始める新人に伝えたい近道の鍵
nakasho
1
290
いまからでも遅くない! コンテナでWebアプリケーションを 動かしてみよう(2-1)WebAPI座学
nomu
0
150
Featured
See All Featured
Robots, Beer and Maslow
schacon
PRO
157
8.2k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
1
250
Designing Experiences People Love
moore
138
23k
Building Flexible Design Systems
yeseniaperezcruz
327
38k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
4
110
Rails Girls Zürich Keynote
gr2m
93
13k
ピンチをチャンスに:未来をつくるプロダクトロードマップ #pmconf2020
aki_iinuma
105
48k
WebSockets: Embracing the real-time Web
robhawkes
59
7.3k
How GitHub Uses GitHub to Build GitHub
holman
473
290k
Testing 201, or: Great Expectations
jmmastey
38
7k
Gamification - CAS2011
davidbonilla
80
5k
Intergalactic Javascript Robots from Outer Space
tanoku
268
27k
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