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
How to control loading state in React
Search
Sponsored
·
Ship Features Fearlessly
Turn features on and off without deploys. Used by thousands of Ruby developers.
→
Takumi Ohashi
December 06, 2018
Technology
2
230
How to control loading state in React
Meguro.es #18
Takumi Ohashi
December 06, 2018
Tweet
Share
More Decks by Takumi Ohashi
See All by Takumi Ohashi
freee Tech Night #2 会計freee 7年目のフロントエンド開発
tohashi
1
8.9k
Immutable.js with Flowtype
tohashi
0
7.4k
フロントエンドのモダン化とJavaScriptモジュールの 依存解決
tohashi
8
3.1k
Other Decks in Technology
See All in Technology
セキュリティについて学ぶ会 / 2026 01 25 Takamatsu WordPress Meetup
rocketmartue
1
300
AIと新時代を切り拓く。これからのSREとメルカリIBISの挑戦
0gm
0
900
OpenShiftでllm-dを動かそう!
jpishikawa
0
100
All About Sansan – for New Global Engineers
sansan33
PRO
1
1.3k
We Built for Predictability; The Workloads Didn’t Care
stahnma
0
140
会社紹介資料 / Sansan Company Profile
sansan33
PRO
15
400k
IaaS/SaaS管理における SREの実践 - SRE Kaigi 2026
bbqallstars
4
2.2k
配列に見る bash と zsh の違い
kazzpapa3
1
140
外部キー制約の知っておいて欲しいこと - RDBMSを正しく使うために必要なこと / FOREIGN KEY Night
soudai
PRO
12
5.4k
フルカイテン株式会社 エンジニア向け採用資料
fullkaiten
0
10k
生成AI時代にこそ求められるSRE / SRE for Gen AI era
ymotongpoo
5
3.2k
usermode linux without MMU - fosdem2026 kernel devroom
thehajime
0
230
Featured
See All Featured
The Hidden Cost of Media on the Web [PixelPalooza 2025]
tammyeverts
2
180
jQuery: Nuts, Bolts and Bling
dougneiner
65
8.4k
Speed Design
sergeychernyshev
33
1.5k
DevOps and Value Stream Thinking: Enabling flow, efficiency and business value
helenjbeal
1
94
Building Adaptive Systems
keathley
44
2.9k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
27k
How Fast Is Fast Enough? [PerfNow 2025]
tammyeverts
3
450
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
25
1.7k
Crafting Experiences
bethany
1
48
Designing Experiences People Love
moore
144
24k
Paper Plane
katiecoart
PRO
0
46k
Mozcon NYC 2025: Stop Losing SEO Traffic
samtorres
0
140
Transcript
3FBDUͰ ϩʔσΟϯάΛ Ͳ͏ѻ͏͔ @_tohashi
ൃද͢Δਓ • Takumi Ohashi • @_tohashi • freee
࿑ಇڥ • ϞϊϦγοΫͳRailsΞϓϦέʔγϣϯ • ςʔϒϧ 600ڧ • js 40ສߦऑ •
React, flux, flowtype
࣏҆ҡ࣋ • ਓίʔυଟ͍ • ESLint, Prettier • ੩తʹղੳͰ͖ͳ͍ͷ • ίϯϙʔωϯτσʔλϑϩʔͷ࣮ํ
• ׂͷཻ, SFC • HOC, render props • ঢ়ଶཧ
ίϯϙʔωϯτͷঢ়ଶཧ • Ͳ͜Ͱཧ͖͔͢ • ϑΥʔϜͷೖྗ • μΠΞϩάͷ։ด • ඇಉظॲཧதͷεϐφʔදࣔ •
ઃܭ࣮ͷํ͔Ε͕ͪ • υΩϡϝϯταϯϓϧʹΑͬͯҧ͏
Redux ͷ FAQ
ίϯϙʔωϯτͷঢ়ଶཧ • ཁదٓஅ • ΞϓϦέʔγϣϯͷنɺཁ݅ɺར༻͢Δϥ ΠϒϥϦʹΑΔ • ҉ʹͳΓ͕ͪ • νʔϜ։ൃͳΒࢦͷ౷Ұඞཁ
ϩʔσΟϯά • APIϦΫΤετதʹεϐφʔΛදࣔͨ͠Γɺଞ ͷૢ࡞ΛϒϩοΫͨ͠Γ • ίϯϙʔωϯτͷঢ়ଶͰ͋Δ͕ඇಉظॲཧ ActionCreator ଆͰߦΘΕΔ
ϩʔσΟϯάͷ ࣮όϦΤʔγϣϯ
ίϯϙʔωϯτͰ݁
ίϯϙʔωϯτͰ݁ • ϚϯτޙʹҰ͚ͩAPIϦΫΤετΛૹ ΓɺͦͷϨεϙϯεͷϖΠϩʔυΛͬͯί ϯςϯπΛඳը • ϛχϚϜͳ React ΞϓϦέʔγϣϯ
ίϯϙʔωϯτͰ݁
ίϯϙʔωϯτͰ݁
ίϯϙʔωϯτͰ݁ ʢෳճͷϦΫΤετʣ • ϢʔβʔͷΞΫγϣϯʹԠͯ͡ෳճϦΫΤ ετΛૹΔ • ϖʔδωʔγϣϯͳͲ
ίϯϙʔωϯτͰ݁ ʢෳճͷϦΫΤετʣ • v
ίϯϙʔωϯτͰ݁ ʢෳճͷϦΫΤετʣ
Store ͷ State ͱͯ͠ཧ
Store ͷ Stateͱͯ͠ཧ • w/Redux • ϩʔσΟϯάͷঢ়ଶ Store ͷ State
ͱͯ͠ѻ ͏ • ίϯϙʔωϯτΛ presentational ʹͰ͖Δ
Store ͷ Stateͱͯ͠ཧ
Store ͷ Stateͱͯ͠ཧ
ϦετϏϡʔ • ϦετʹෳͷΞΠςϜ • ΞΠςϜ୯ҐͰฤूͯ͠ߋ৽ • ΞΠςϜ͝ͱʹϩʔσΟϯάͷঢ়ଶΛ࣋ͭ
ϦετϏϡʔ
ϦετϏϡʔ
ϦετϏϡʔ
ϩʔσΟϯάྃޙͷΞΫγϣϯ • ʮอଘ͠·ͨ͠ʯͳͲͷϝοηʔδ Notification ͷදࣔ • ϩʔσΟϯά͕ྃͨ͠ޙͷҰճ͚ͩൃੜ͞ ͍ͤͨ • ࣌ؒܦաϢʔβʔͷΞΫγϣϯͰফ͑Δ
ϩʔσΟϯάྃޙͷΞΫγϣϯ
ϩʔσΟϯάྃޙͷΞΫγϣϯ
ΑΓେنͳΞϓϦέʔγϣϯ • ReducerͷංେԽ • API͝ͱʹREQUEST, SUCCESS, (FAILED) • LoadingReducerͳͲʹׂ •
LoadingStateͷόέπϦϨʔ • Context API
ίϯϙʔωϯτͷ State ͱͯ͠ཧ
ίϯϙʔωϯτͷ Stateͱͯ͠ ཧ • Store ͷ State άϩʔόϧ • ϩʔσΟϯάίϯϙʔωϯτͷঢ়ଶͱͯ͠
͍݁ͤͨ͞ • ͔ͭ Redux ͷσʔλϑϩʔͱΈ߹ΘͤΔ
ίϯϙʔωϯτͷ State ͱͯ͠ ཧ
ίϯϙʔωϯτͷ State ͱͯ͠ ཧ
ίϯϙʔωϯτͷ State ͱͯ͠ ཧ
Suspense
Suspense • ϞδϡʔϧͷԆϩʔυඇಉظॲཧ͕ྃ ͢Δ·ͰϨϯμϦϯάΛ suspend Ͱ͖Δ • ϞδϡʔϧͷԆϩʔυ v16.6 ͔Β
• ඇಉظॲཧ mid 2019 ·Ͱʹʢ༧ఆʣ
Suspense
Suspense
Suspense • ۜͷؙͰͳ͍ • Ϧιʔεͷߋ৽ͳͲσʔλϑΣονҎ֎ͷॲཧ ैདྷ௨Γ͍ͬͯ͘ඞཁ͕͋Δ • ΩϟογϡཧϛεΔͱ͍ • ࠷ѱϨϯμϦϯάຖʹ
API ϦΫΤετ͕ඈͿ
͓ΘΓʹ • ϩʔσΟϯάҰͭͱ࣮ͬͯํ๏༷ʑ • ࣗ Store ͷ State ->
ਏ͘ͳͬͯίϯϙʔωϯτͷ State ʹ • ίϯϙʔωϯτͷ async Λڐ༰Ͱ͖Δ͔Ͳ͏͔ • ࣮ࡍ͜͜ʹΤϥʔϋϯυϦϯάೖͬͯ͘Δ • ࠷ڧͷϩʔσΟϯάঢ়ଶཧΛߟ͍͖͑ͯ·͠ΐ͏