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
ReactとRxで負債作った
Search
Taketoshi Aono(青野健利 a.k.a brn)
March 29, 2018
Programming
2
3k
ReactとRxで負債作った
ReactとRxでだめなことやっちゃったやつです
Taketoshi Aono(青野健利 a.k.a brn)
March 29, 2018
Tweet
Share
More Decks by Taketoshi Aono(青野健利 a.k.a brn)
See All by Taketoshi Aono(青野健利 a.k.a brn)
document.write再考
brn
6
2.7k
Parsing Javascript
brn
12
8k
JSON & Object Tips
brn
1
330
CA 1Day Youth Bootcamp for Frontend LT
brn
0
720
Modern TypeScript
brn
2
700
javascript - behind the scene
brn
3
640
tc39 proposals
brn
0
720
プロダクト開発とTypeScript
brn
8
2.7k
React-Springでリッチなアニメーション
brn
1
540
Other Decks in Programming
See All in Programming
SDCon2024: Enabling DevOps and Team Topologies thru architecture: architecting for fast flow
cer
PRO
0
780
12年前の『型システム入門』翻訳の思い出話
mame
11
1.2k
社内 LT 会を発足し、アウトプット文化を醸成させるために考えたこと・やったこと / Starting internal LT meetings and fostering an output culture
mackey0225
3
120
今こそ始める、CDKコンストラクトライブラリ開発 ― 入門から実践まで
tmokmss
1
930
Temporalを取り巻く仕様を整理する
sajikix
0
110
開発部に不満を持っていたCSがエンジニアにジョブチェンしてわかった「勝手に諦めない」ことの大切さ
sakuraikotone
28
16k
ドメイン駆動設計の実践
masuda220
PRO
17
5.1k
Rust.Nagoya #1
codemountains
0
170
[After Kotlin Fest 2024 LT Night @ Sansan] もっともっとKotlinを好きになる!K2 Compiler Pluginで遊んでみよう!
kitakkun
2
260
Play Billing Library 7.0.0 変更点まとめ@potatotips#88
kako351
0
160
小さな開発会社を作った理由
polidog
0
1.9k
わかりやすい正解を捨てて、コトに向き合う - スクラムフェス金沢2024 スポンサーセッション
yusukekokubo
0
170
Featured
See All Featured
The Pragmatic Product Professional
lauravandoore
29
6.1k
Large-scale JavaScript Application Architecture
addyosmani
506
110k
Building Your Own Lightsaber
phodgson
101
5.9k
Code Reviewing Like a Champion
maltzj
517
39k
Happy Clients
brianwarren
94
6.5k
How to Ace a Technical Interview
jacobian
274
23k
GraphQLの誤解/rethinking-graphql
sonatard
59
9.6k
The Brand Is Dead. Long Live the Brand.
mthomps
52
36k
Building Effective Engineering Teams - LeadDev
addyosmani
47
2.2k
GitHub's CSS Performance
jonrohan
1026
450k
Design by the Numbers
sachag
277
18k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
325
21k
Transcript
ReactהRxJSד 頾⫈⡲
Name @brn (ꫬꅿ⨳ⵃ) Occupation ؿٗٝزؒٝسؒٝآص،٥ط؎ذ؍ـؒٝآص، Company Cyberagent ،سذؙأةآؔ AI Messenger
OSS Contributor of V8 About http://info.b6n.ch
וז頾⫈? React눤何鸡׃גRxךObservable湫䱸Ⳣ椚דֹ״ֲח׃
Why? Reduxָ֮ת㥨ֹׄׯזַַ
ז頾⫈חז React16ח،حفر٦زדֹזְ PropsָObservableזךַ麩ֲךַⴻⴽדֹזְ 杝荈ֺׅ
Implementation Reactח床ׅprops♧א♧אָObservableחזגֶծ ⰻ鿇ד䗳銲ז皘䨽ֽ،حفر٦زׁկ shouldComponentUpdate䗳銲זְ 剑䓼(^^)
class Component extends React.Component {! render() {! return (! <div>!
<h1>{title}</h1>! <Subscriber>! <span className={classNameObservable}>! {contentObservable}! </span>! </Subscriber>! </div>! )! }! }!
import {Tags as T} from './subscriber';! ! class Component extends
React.Component {! render() {! return (! <div>! <h1>{title}</h1>! <T.Span className={classNameObservable}>! {contentObservable}! </T.Span>! </div>! )! }! }!
How to work Observableָ♧䏝SubscriberַTags穗歋ד鏣㹀ׁהծ ֮הכObservableח⦼ָ崧ןחTagsַSubscriberךؒٔ،ך ָ刿倜ׁ Observableⰻ鿇ח⦼ָ崧ֽזךדծ鋵؝ٝه٦طٝزך componentWillReceivePropsכ⹛⡲׃זְ
How to implement SubscriberכstateחvdomגְגծObservableָ刿倜ׁ ןחsetStateㄎן⳿׃גvdom湫䱸ٖٝتؚׅٔٝ
class Subscriber extends React.Component {! constructor(p) {! super(p);! this.state =
{ vdom: null };! }! ! render() { return this.state.vdom }! ! componentDidMount() {! this.searchAndSubscribeObservables();! }! }!
const foundObservables = [];! ! React.Children.map(element.children, (child) => {! if
(child instanceof Observable) {! foundObservables.push(! {! update: value => updateChild(element, value),! observable: child! });! } else {! this.checkProps(child);! }! });!
Observable.combineLatest! .apply(! null,! foundObservables! .map(v => v.observable))! .subscribe(updates => {!
updates.forEach(update => {! update();! })! });!
React.Element Reactךⰻ鿇דכReact.Elementָjsx♳ך1銲稆邌ׅկ
{! $$typeof: Symbol.for('react.element'),! type: 'div' | constructor,! key: key,! ref:
ref,! props: props,! }!
Fastest - Mutable - React.ElementכdevelopmentדכObject.feezeׁגimmutable זؔـآؙؑزחזגְկ mutableזקֲָ傍ְךדObject.freezeַ佝ׅ
Mutable React 瑞ךReact.Element⡲ג$$typeof؝ؾ٦ֿׅהדծ ٖٖؔؔReact.Element⡲䧭 ךתתSubscriber⟃♴ךchildrenח床ֿׅהד Mutableזtreeָ⡲䧭דֹ
const REACT_ELEMENT_TYPEOF ! = React! .createElement('div', {})['$$typeof'];! ! const mutableElement
= {! '$$typeof': REACT_ELEMENT_TYPEOF,! ...! }!
Hyper Fast Update SubscriberכֿךMutable Tree刿倜ָ֮皘䨽ך㢌刿׃ג䨱 ׅךדծReact.Elementךⱄ⡲䧭؝أزָ0חזկ
Problems TypeScriptדpropsך㘗➰ֽהֹחObservableזךַPrimitive זךַ״ַֻזְךהծ Subscriberד㔲ת皘䨽כ؝٦س♳כObservableָծ㹋ꥷחכ Primitiveז⦼ָ床גֻךדPropTypesהַ֮ה㔭
<Subscriber>! <MyComponent! propsA={porpsA as any}! propsB={propsB as any}/>! </Subscriber>!
Problems ObservableכׅץגshareReplyהַךreply禸ח׃זְה⹛⡲׃ז ְ
Problems props⡲ךָ⦜ ♧א♧אךpropsָObservableזךדׅץגךprops嫣חreducer ְזך欽䠐׃זֽלזזְ
Problems 荈ⴓָ鍗גְךָObservableזךַPrimitiveזךַַזֻ זגְֻ
Problems Reactך،حفر٦زָדֹזְ React.Elementךⰻ鿇תד㢌刿׃גְךדծFiberך⚥תד鋅זְ ה⹛ַזְ⾱㔓ַָזְկ 儗ךيت
Summary 傀㶷ךך穈さׇגءٝفٕחאֻת׃׳ֲ ReactחRxכְזְךַ׃זְ