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
Tech Nottingham: Introduction to React
Search
Jack Franklin
April 04, 2016
Technology
2
110
Tech Nottingham: Introduction to React
Jack Franklin
April 04, 2016
Tweet
Share
More Decks by Jack Franklin
See All by Jack Franklin
Advanced React Meetup: Testing JavaScript
jackfranklin
1
210
Components on the Web: Frontend NE
jackfranklin
1
770
ReactiveConf: Lessons Migrating Complex Software
jackfranklin
0
430
Front Trends: Migrating complex software
jackfranklin
1
770
Migrating from Angular to React: Manc React
jackfranklin
1
150
Half Stack Fest: Webpack
jackfranklin
4
500
FullStackFest: Elm for JS Developers
jackfranklin
1
210
Codelicious: Intro to ES2015
jackfranklin
0
350
PolyConf: Elm for JS Developers
jackfranklin
0
250
Other Decks in Technology
See All in Technology
君はPostScriptなウィンドウシステム 「NeWS」をご存知か?/sunnews
koyhoge
0
720
Classmethod AI Talks(CATs) #15 司会進行スライド(2025.02.06) / classmethod-ai-talks-aka-cats_moderator-slides_vol15_2025-02-06
shinyaa31
0
170
Moved to https://speakerdeck.com/toshihue/presales-engineer-career-bridging-tech-biz-ja
toshihue
2
550
All you need to know about InnoDB Primary Keys
lefred
0
120
ビジネスと現場活動をつなぐソフトウェアエンジニアリング~とあるスタートアッププロダクトの成長記録より~
mizunori
0
210
目の前の仕事と向き合うことで成長できる - 仕事とスキルを広げる / Every little bit counts
soudai
22
5.8k
滅・サービスクラス🔥 / Destruction Service Class
sinsoku
6
1.5k
インフラをつくるとはどういうことなのか、 あるいはPlatform Engineeringについて
nwiizo
5
2.1k
バックエンドエンジニアのためのフロントエンド入門 #devsumiC
panda_program
16
6.5k
スタートアップ1人目QAエンジニアが QAチームを立ち上げ、“個”からチーム、 そして“組織”に成長するまで / How to set up QA team at reiwatravel
mii3king
1
1.1k
2.5Dモデルのすべて
yu4u
2
610
サーバーレスアーキテクチャと生成AIの融合 / Serverless Meets Generative AI
_kensh
12
3k
Featured
See All Featured
Designing for humans not robots
tammielis
250
25k
Adopting Sorbet at Scale
ufuk
74
9.2k
The Straight Up "How To Draw Better" Workshop
denniskardys
232
140k
Java REST API Framework Comparison - PWX 2021
mraible
28
8.4k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
45
2.3k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
59k
Build your cross-platform service in a week with App Engine
jlugia
229
18k
Testing 201, or: Great Expectations
jmmastey
41
7.2k
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
4
400
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.4k
Six Lessons from altMBA
skipperchong
27
3.6k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
366
25k
Transcript
None
@Jack_Franklin
None
None
None
None
None
The ideas in React are more important than React itself
Components
Header News Feed Nav Chat with Alice
React Components
var HelloWorld = React.createClass({ render: function() { return <h1>Hello World!</h1>;
} })
var HelloWorld = React.createClass({ render: function() { return <h1>Hello World!</h1>;
} })
var HelloWorld = React.createClass({ render: function() { return <h1>Hello World!</h1>;
} })
return <h1>Hello World!</h1>;
JSX https://facebook.github.io/react/docs/jsx-in-depth.html
This is a good thing, trust me…
It’s not HTML in your JavaScript
It’s JavaScript in your JavaScript
// Input (JSX): var app = <Nav color="blue" />; //
Output (JS): var app = React.createElement( Nav, { color: "blue" } );
var HelloWorld = React.createClass({ render: function() { return <h1>Hello World!</h1>;
} }) ReactDOM.render( <HelloWorld />, document.getElementById('app') )
var HelloWorld = React.createClass({ render: function() { return <h1>Hello World!</h1>;
} }) ReactDOM.render( <HelloWorld />, document.getElementById('app') )
var HelloWorld = React.createClass({ render: function() { return <h1>Hello World!</h1>;
} }) ReactDOM.render( <HelloWorld />, document.getElementById('app') )
https://jsbin.com/fujaru/edit?html,js,output
props
var Person = React.createClass({ render: function() { return ( <div>
<h2>Name: { this.props.name }</ h2> <p>Favourite colour: { this.props.colour }</p> </div> ); } });
ReactDOM.render( <Person name="Jack" colour="Blue" />, document.body )
https://jsbin.com/wulolu/edit?js,output
props: data the component doesn’t change
state
var OnOff = React.createClass({ getInitialState: function() { return { on:
false } }, render: function() { return ( <div> <button>Toggle</button> <p>{ this.state.on ? 'ON' : 'OFF'}</p> </div> ) } })
var OnOff = React.createClass({ getInitialState: function() { return { on:
false } }, render: function() { return ( <div> <button>Toggle</button> <p>{ this.state.on ? 'ON' : 'OFF'}</p> </div> ) } })
var OnOff = React.createClass({ ... render: function() { return (
<div> <button onClick={this.toggle}> Toggle </button> </div> ) } })
var OnOff = React.createClass({ ... toggle: function() { this.setState({ on:
!this.state.on }) }, … })
http://jsbin.com/senedajafa/edit?js,output
state: data the component owns and will change
use props by default
None
None
None
None
None
virtual dom https://facebook.github.io/react/docs/reconciliation.html
components in components
var Mailbox = React.createClass({ getInitialState: function() { return { messages:
[{ id: 1, title: 'Hello', content: 'How is it going?', sender: 'Alice' }, {…}] } },
render: function() { }
var messages = this.state.messages; var mails = messages.map(function(message) { return
( <li key={message.id}> <Message message={message} /> </li> ); }) return <ul>{mails}</ul>;
var messages = this.state.messages; var mails = messages.map(function(message) { return
( <li key={message.id}> <Message message={message} /> </li> ); }) return <ul>{mails}</ul>;
var messages = this.state.messages; var mails = messages.map(function(message) { return
( <li key={message.id}> <Message message={message} /> </li> ); }) return <ul>{mails}</ul>;
var messages = this.state.messages; var mails = messages.map(function(message) { return
( <li key={message.id}> <Message message={message} /> </li> ); }) return <ul>{mails}</ul>;
var messages = this.state.messages; var mails = messages.map(function(message) { return
( <li key={message.id}> <Message message={message} /> </li> ); }) return <ul>{mails}</ul>;
var messages = this.state.messages; var mails = messages.map(function(message) { return
( <li key={message.id}> <Message message={message} /> </li> ); }) return <ul>{mails}</ul>;
var messages = this.state.messages; var mails = messages.map(function(message) { return
( <li key={message.id}> <Message message={message} /> </li> ); }) return <ul>{mails}</ul>;
var Message = React.createClass({ render() { return ( <h4> {
this.props.message.title } </h4> ); } });
http://jsbin.com/jagizaheqo/edit?js,output
reusable components
var Person = React.createClass({ render() { return <p>{this.props.name} has a
favourite colour of {this.props.colour} </p> } }) ReactDOM.render( <Person name="jack" colour="blue" />, document.body )
ReactDOM.render( <Person colour="blue" />, document.body )
ReactDOM.render( <Person />, document.body )
propTypes
var types = React.PropTypes; var Person = React.createClass({ propTypes: {
name: types.string.isRequired, colour: types.string.isRequired },
var types = React.PropTypes; var Person = React.createClass({ propTypes: {
name: types.string.isRequired, colour: types.string.isRequired },
var types = React.PropTypes; var Person = React.createClass({ propTypes: {
name: types.string.isRequired, colour: types.string.isRequired },
http://jsbin.com/wawevinesi/edit?js,output
encourage reuse use propTypes
lifecycle
None
https://docs.google.com/drawings/ d/ 15yjhlRlNs2k8rDw1g_F9_nYWUL0 FsUDCFzAxMOGv5nI/edit
https://facebook.github.io/ react/docs/component- specs.html
componentWillMount
var GitHubPerson = React.createClass({ getInitialState: function() { return { data:
{} }; }, componentWillMount: function() { getData().then(function(data) { this.setState({ data: data }) }.bind(this)); },
var GitHubPerson = React.createClass({ getInitialState: function() { return { data:
{} }; }, componentWillMount: function() { getData().then(function(data) { this.setState({ data: data }) }.bind(this)); },
var GitHubPerson = React.createClass({ getInitialState: function() { return { data:
{} }; }, componentWillMount: function() { getData().then(function(data) { this.setState({ data: data }) }.bind(this)); },
var GitHubPerson = React.createClass({ getInitialState: function() { return { data:
{} }; }, componentWillMount: function() { getData().then(function(data) { this.setState({ data: data }) }.bind(this)); },
render: function() { return ( <p>{this.state.data.name} from { this.state.data.company }</p>
); }
http://jsbin.com/nalozobapa/edit?js,output
https://facebook.github.io/ react/docs/thinking-in- react.html
Large applications
http://redux.js.org/
http://redux.js.org/docs/ introduction/ Motivation.html
As the requirements for JavaScript single-page applications have become increasingly
complicated, our code must manage more state than ever before
STATE
STATE STORE
STATE STORE Uni-directional data flow
URLs
https://github.com/ rackt/react-router
One of the best (and overlooked) things about React is
how much code you write that's just plain old JavaScript.
https:// facebook.github.io/react/
Questions?
jackfranklin/react-introduction- exercises
10th of June, London React Workshop http://www.whiteoctoberevents.co.uk/ event/reactjs-workshop-june-16/
@Jack_Franklin
[email protected]
javascriptplayground.com