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
Suspense and TimeSlicing
Search
koba04
June 26, 2018
Programming
0
280
Suspense and TimeSlicing
at ReactJS Tokyo June
https://www.meetup.com/ja-JP/ReactJS-Tokyo/events/251543969/
koba04
June 26, 2018
Tweet
Share
More Decks by koba04
See All by koba04
フロントエンドの現在地とこれから
koba04
10
5.3k
Standing on the shoulders of giants
koba04
0
2.9k
React/Next によるアプリケーション開発のこれから
koba04
61
17k
フロントエンド刷新をプロジェクトとして進める際に気をつけていること
koba04
3
1.9k
How useEvent would change our applications
koba04
1
3.1k
kintoneフロントエンド刷新によるモノリスからの脱却とその先に目指す未来
koba04
3
15k
Make it Declarative with React
koba04
0
1.8k
Ready for React in 2019
koba04
2
1.7k
Algorithms in React
koba04
14
17k
Other Decks in Programming
See All in Programming
複雑化したリポジトリをなんとかした話 pipenvからuvによるモノレポ構成への移行
satoshi256kbyte
1
760
ИИ-Агенты в каждый дом – Алексей Порядин, PythoNN
sobolevn
0
150
After go func(): Goroutines Through a Beginner’s Eye
97vaibhav
0
230
Playwrightはどのようにクロスブラウザをサポートしているのか
yotahada3
7
2.3k
メモリ不足との戦い〜大量データを扱うアプリでの実践例〜
kwzr
1
840
CI_CD「健康診断」のススメ。現場でのボトルネック特定から、健康診断を通じた組織的な改善手法
teamlab
PRO
0
180
Чего вы не знали о строках в Python – Василий Рябов, PythoNN
sobolevn
0
160
Let's Write a Train Tracking Algorithm
twocentstudios
0
220
Pythonスレッドとは結局何なのか? CPython実装から見るNoGIL時代の変化
curekoshimizu
4
1.3k
GitHub Actions × AWS OIDC連携の仕組みと経緯を理解する
ota1022
0
240
Pull-Requestの内容を1クリックで動作確認可能にするワークフロー
natmark
2
450
開発者への寄付をアプリ内課金として実装する時の気の使いどころ
ski
0
350
Featured
See All Featured
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.5k
We Have a Design System, Now What?
morganepeng
53
7.8k
What's in a price? How to price your products and services
michaelherold
246
12k
The Straight Up "How To Draw Better" Workshop
denniskardys
237
140k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
657
61k
Thoughts on Productivity
jonyablonski
70
4.9k
[RailsConf 2023] Rails as a piece of cake
palkan
57
5.9k
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Large-scale JavaScript Application Architecture
addyosmani
514
110k
Facilitating Awesome Meetings
lara
56
6.6k
Reflections from 52 weeks, 52 projects
jeffersonlam
352
21k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Transcript
5JNF4MJDJOHBOE4VTQFOTF 3FBDU+45PLZP+VOF !LPCB
None
3FDBQ3FBDU'JCFS
w 3FBDU'JCFSJTBOVOJUPGXPSL 㲈3FBDU&MFNFOU w *UJTQPTTJCMFUPTUPQBOESFTVNFVQEBUFT 3FDBQ3FBDU'JCFS FiberA FiberB FiberD
FiberE Commit all SideEffects Idle Time Idle Time Idle Time SideEffect SideEffect Host (DOM) FiberC Render Phase Commit Phase
w 3FOEFS1IBTFʜ"TZOD w $PNNJU1IBTFʜ4ZOD 3FDBQ3FBDU'JCFS FiberA FiberB FiberD FiberE Commit
all SideEffects Idle Time Idle Time Idle Time SideEffect SideEffect Host (DOM) FiberC Async Sync
FiberC 4VTQFOEBOE3FTVNF FiberA FiberB FiberA FiberC Commit Low Priority High
Priority Commit FiberA FiberB FiberC Low Priority Reuse Interrupt Suspend Resume
5JNF4MJDJOH
w #MPDLJOH6*UISFBEJTBOBXGVMFYQFSJFODF w 5IFSFBSFNBOZQFPQMFXIPVTFMPXQPXFSEFWJDFT w %FCPVODJOHBOEUISPUUMJOHBSFGPSMPXQPXFSEFWJDFT 5JNF4MJDJOH <AsyncMode> <FilterInput onChange={value
=> { this.setState({value}); requestAnimationFrame(() => this.setState({data: this.filterData(value)}) ); }}
https://github.com/facebook/react/blob/master/packages/react-dom/src/events/SimpleEventPlugin.js
https://react-timeslicing-demo.netlify.com/ Low Priority High Priority
Schedule by React Scheduler
https://github.com/facebook/react/commit/1e3cd332a015e312149efa36eb81c7523411cc2d#diff- bbebc3357e1fb99ab13ad796e04b69a6
%FNP IUUQTSFBDUUJNFTMJDJOHEFNPOFUMJGZDPN IUUQTHJUIVCDPNLPCBSFBDUUJNFTMJDJOHEFNP
4VTQFOTF
8IBUJT4VTQFOTF
https://reactjs.org/blog/2018/03/01/sneak-peek-beyond-react-16.html
w 4VTQFOTFJTBGFBUVSFUPIBOEMFBTZODVQEBUFT w )5513FRVFTU w %ZOBNJDJNQPSU w 1SPNJTFBTBQSJNJUJWF w )BOEMJOHBTZODISPOPVTVQEBUFTBSFTPIBSEʜ
w 4UBSU-PBEJOH "1*4VDDFTT 'BJMVSFʜ w .BOZMPBEJOHTQJOOFST KBOL6*CZGBTUSFTQPOTFT 4VTQFOTF
w /P w 4VQQPSUJOH1SPNJTF$PNQPOFOUEPFTO`UTPMWFQSPCMFNT w )PXEPZPVMJGUVQEFQFOEFODJFTPG1SPNJTF$PNQPOFOUT JOBODFTUPST *T4VTQFOTFTVQQPSUJOH1SPNJTF$PNQPOFOU // How
do you show loading message // until the user list has been fetched? {isLoading ? <Loading /> : <UserListPage />}
)PXEPFT4VTQFOTFXPSL
w 4VTQFOTFJTCBTFEPO&SSPS#PVOEBSJFT UIPVHIXIJDI UISPXT1SPNJTFJOTUFBEPG&SSPS )PXEPFT4VTQFOTFXPSL User Fallback Timeout throw Promise!
(suspend) timeout render with fetched Data (resume)
4JNQMF$BDIF1SPWJEFS
https://github.com/facebook/react/tree/master/packages/simple-cache-provider
Empty Pending Resolved Rejected read or preload throw promise return
value from cache Cache load
)PXUPVTF4VTQFOTF
4VTQFOTF "1*XJMMCFDIBOHFE import SimpleCacheProvider from ‘simple-cache-provider’; const cache = SimpleCacheProvider.createCache();
const userFetcher = id => SimpleCacheProvider.createResource(id => fetch(`/api/users/${id}`).then(res => res.json()); )(cache, id); const User = props => { const user = userFetcher.read(props.id); return <div>{user.name}</div>; }; const Placeholder = props => ( <React.Timeout ms={props.timeout}> {didExpire => didExpire ? props.fallback : props.children} </React.Timeout> ); <Placeholder fallback=“Loading…” timeout={200}> <User id={100} /> </Placeholder>
4VTQFOTF "1*XJMMCFDIBOHFE import SimpleCacheProvider from ‘simple-cache-provider’; const cache = SimpleCacheProvider.createCache();
const routeFetcher = Component => SimpleCacheProvider.createResource(Component => import(Component).then(module => module.default); )(cache, Component); const UserPage = () => { const Component = routeFetcher.read(‘./pages/User’); return <Component />; }; const Placeholder = props => ( <React.Timeout ms={props.timeout}> {didExpire => didExpire ? props.fallback : props.children} </React.Timeout> ); <Placeholder fallback=“Loading…” timeout={1000}> <UserPage /> </Placeholder>
%FNP IUUQTSFBDUTVTQFOTFEFNPOFUMJGZDPN IUUQTHJUIVCDPNLPCBSFBDUTVTQFOTFEFNP
w 4VTQFOTFXJMMCFBWBJMBCMFJOWCZEFGBVMU w 5IFpOBM"1*NJHIUCFDIBOHFE w :PVDBOFYQFSJNFOUJUXJUIBDBOBSZWFSTJPO 4VTQFOTF $ npm install
react@canary react-dom@canary simple-cache-provider
5IBOLZPV TQFBLFSEFDLDPNLPCB