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
Trying State Manegemant without Redux(updated)
Search
Nokogiri
October 25, 2019
Programming
1
1.2k
Trying State Manegemant without Redux(updated)
Reduxを利用せずに、React の Context と Hooksで状態管理してみる話
Nokogiri
October 25, 2019
Tweet
Share
More Decks by Nokogiri
See All by Nokogiri
FizzBuzzで学ぶOCP
undefined_name
0
31
エンジニアとQAでコラボするフロントエンドリアーキテクチャ開発の事例
undefined_name
4
2k
オブジェクト指向のプラクティスをフロントエンドで活用する
undefined_name
7
1.2k
モププロ@kintone開発チーム
undefined_name
1
440
勉強会で登壇者に 質問しづらい課題を解決する サービスをリリースしました🎉
undefined_name
2
1.1k
Usefull GitLens
undefined_name
3
650
kintone開発チームにジョインして6カ月の所感
undefined_name
1
260
Learning-Hooks
undefined_name
0
550
5分で紹介するエンジニアの知的生産術
undefined_name
0
77
Other Decks in Programming
See All in Programming
Apache Hive 4 on Treasure Data
ryukobayashi
0
100
Snowflakeで眠ったデータを起こそう!
estie
0
110
GraphQLサーバの構成要素を整理する #ハッカー鮨 #tsukijigraphql / graphql server technology selection
izumin5210
4
820
使ってみよう Azure AI Document Intelligence
kosmosebi
2
300
Ruby Pattern Matching
bkuhlmann
0
920
코틀린으로 멀티플랫폼 만들기
pangmoo
0
150
OpenAPIを中心に考えるAPI開発入門 / Introduction to API Development with a Focus on OpenAPI
seike460
PRO
2
170
デフォルトにして至高、RubyMineの大好きな所
ruzia
0
290
"config" ってなんだ? / What is "config"?
okashoi
0
240
今、知っておきたい! 生成AIエージェントの世界
elith
3
350
FigmaとPHPで作る1ミリたりとも表示崩れしない最強の帳票印刷ソリューション
ttskch
43
19k
ONE WEDGE_company_guide
1wedge_one
0
470
Featured
See All Featured
Java REST API Framework Comparison - PWX 2021
mraible
PRO
18
6.9k
StorybookのUI Testing Handbookを読んだ
zakiyama
13
4.6k
Designing Experiences People Love
moore
136
23k
Documentation Writing (for coders)
carmenintech
60
3.9k
How To Stay Up To Date on Web Technology
chriscoyier
782
250k
Rebuilding a faster, lazier Slack
samanthasiow
73
8.2k
Into the Great Unknown - MozCon
thekraken
10
990
The Pragmatic Product Professional
lauravandoore
25
5.8k
Imperfection Machines: The Place of Print at Facebook
scottboms
260
12k
Docker and Python
trallard
34
2.7k
Build The Right Thing And Hit Your Dates
maggiecrowley
24
2k
4 Signs Your Business is Dying
shpigford
175
21k
Transcript
Trying StateManagement without Redux updated
Taiki Nishi kintone։ൃνʔϜ ɾϑϩϯτόοΫΤϯυ ɾि̍ͰSlashνʔϜ ɾwww.nkgr.app ɾझຯɿ೫ࡔ46 ɹɹ Nokogiri(@nkgrnkgr)
ReduxΛར༻ͤͣʹɺ React ͷ Context ͱ HooksͰ ঢ়ଶཧͯ͠ΈΔ ͱ͍͏
Redux is Կʁ ɾϞμϯͳJSΞϓϦͷෳࡶͳঢ়ଶཧΛ༧ଌՄೳʹ͢Δػߏ ɾ୯Ұσʔλϑϩʔ View͔Βൃߦ͞ΕͨActionΛDispacherͰॲཧ͠ɺReducer͕Actionͱݱࡏͷ StateΛݩʹ৽͍͠StateΛฦ͢ ɾActionΛ࣮ߦ͢Δ͜ͱͰͲͷΑ͏ͳΛߋ৽ͦ͠ͷ݁Ռ͕Ͳ͏ͳΔͷ͔એ ݴతʹॻ͘͜ͱ͕Ͱ͖Δ
Redux is Կʁ ɾpropsόέπϦϨʔͷճආ ɾClassComponent -> ؔComponetͷҠߦ͍͢͠ ɾRedux Devtool ɺRedux-SagaͳͲपลϥΠϒϥϦΛؚΊΤίγεςϜ͕
Ͱ͖͍ͯΔ → React Redux మ൘
Redux࠷ߴ͡ΌΜ ͍ReduxͰ͍͍͡ΌΜ
ͳͥ Redux ΛΘͳ͍͔ʁ Redux ͷσϝϦοτ ɾهࡌ͕ ɾॳظڭҭίετߴΊ
ͳͥ Redux ΛΘͳ͍͔ʁ • ΞϓϦͷಛੑʹΑͬͯRedux͗͢Δ͜ͱ͕͋Δ • HooksͰؔComponentͰStateΛ͑ΔΑ͏ʹͳͬͨ • ContextΛͬͯɺωετͨ͠ίϯϙʔωϯτͰGlobalͳ ʹΞΫηεͰ͖Δ
• useReducerͱ͍͏Hooks͋Γಉ͡Α͏ͳ࣮Ͱ͖ͦ͏ • Hooks͕ग़ΔલrecomposeΛͬͯߴ֊ؔΛͬͯͨ → ͦ͜·ͰෳࡶͰͳ͍ΞϓϦͰɺReduxͳ͠Ͱӡ༻Ͱ͖Δ ͷͰʁ
ContextͱHooksΛͬͨStateཧ
ContextͱHooksΛͬͨStateཧ Context is Կʁ • ίϯϙʔωϯτπϦʔʹରͯ͠άϩʔόϧͱΈͳͤΔ • ҙͷΛValueͱͯ͠อ࣋Մೳ • https://ja.reactjs.org/docs/context.html
• APIs • React.createContext • Context.Provider
ContextͱHooksΛͬͨStateཧ Context is Կʁ
ContextͱHooksΛͬͨStateཧ Hooks is Կʁ • React 16.8 ͰՃ͞Εͨ৽ػೳ • useXXX
ͱ͍͏ͷ͕ಛ • StateͷཧͳͲReactͷػೳΛClassΛΘͣʹॻ͚Δ ɹhttps://ja.reactjs.org/docs/hooks-intro.html • APIs • useState • useContext • useEffect • useReducer
ContextͱHooksΛͬͨStateཧ Hooks - useContext • const {value} = useContext(HogeContext) •
ҾͰ͢Context͔ΒvalueΛऔΓग़ͤΔ
ContextͱHooksΛͬͨStateཧ Hooks - useState • const [value, setValue] = useState(initialValue)
• valueͱͦΕΛมߋՄೳͳؔΛΓʹ࣋ͭ
Context ͱ useStateΛ Έ߹Θͤͯ Stateཧͯ͠ΈΔ
ContextͱHooksΛͬͨStateཧ ContextͰStateͱؔΛཧ • ContextͷValueҙͷΛཧͰ͖Δ • ValueͰstateͱͦΕΛมߋՄೳͳؔΛཧ
ContextͱHooksΛͬͨStateཧ ContextͰStateͱؔΛཧ
͜ΕͰόέπϦϨʔͳ͠Ͱ GlobalStateʹΞΫηεͰ͖Δ
ContextͱHooksΛͬͨStateཧ طଘͷRedux͔Βͷஔ͖͑ʁ • ࠓ·ͰContainerComponentͰ͍ͬͯͨ mapStateToPropsɺmapDispatchToPropsΛuseContext ͔ΒऔΓग़ͨ͠useStateͷΓʹஔ͖͑Δ
ContextͱHooksΛͬͨStateཧ طଘͷRedux͔Βͷஔ͖͑ʁ • ReduxͰcomponentͷpropsʹ͜Μͳײ͡Ͱ߹͍ͯͨ͠
• εοΩϦʂ ContextͱHooksΛͬͨStateཧ طଘͷRedux͔Βͷஔ͖͑ʁ
ContextͱHooksΛͬͨStateཧ StateͷมߋཧΛݫີʹ͍ͨ͠ʁ • useStateͷΘΓʹuseReducerΛ͑Αͦ͞͏
ContextͱHooksΛͬͨStateཧ const [state, dispatch] = useReducer(reducer, initialSate) (state, action) =>
newState ͱ͍͏ܕͷϦσϡʔα (reducer) Λड͚ औΓɺݱࡏͷ state Λ dispatch ϝιουͱϖΞʹͯ͠ฦ͠·͢ɻ Hooks - useReducer
ContextͱHooksΛͬͨStateཧ Providerଆͷ࣮ Hooks - useReducer
ContextͱHooksΛͬͨStateཧ Consumerଆʢར༻ଆͷ࣮ʣ Hooks - useReducer
Reduxͳ͠Ͱঢ়ଶཧͰ͖ͦ͏
ݒ೦
ݒ೦ • ͦͦuseReducerهࡌͷ͞Λղܾ͠ͳ͍ • Redux-thunk, Redux-SagaͷΑ͏ͳඇಉظॲཧΛαϙʔ τ͢ΔϥΠϒϥϦͱ͔·ͩͳͦ͞͏ • ReduxDevTool͑ͳ͍ •
Contextຊདྷstyle themeͳͲཧ͢Δͷ • ConsumerΛར༻͢ΔίϯϙʔωϯτProviderͷมߋ Λड͚Δͱ࠶ඳը͞ΕΔͷͰɺύϑΥʔϚϯεʹӨڹ͕ ͋Δ
݁ • هࡌͷੑΛճආ͢Δ͜ͱͰ͖Δ • ReduxͷΤίγεςϜʹ͍Εͳ͍ͷͭΒ͍ • ΞϓϦέʔγϣϯͷαΠζײෳࡶ͞ʹΑͬͯ͋Γ ͔
ࢀߟϥΠϒϥϦ ContextΛ͏ϥΠϒϥϦ1 react-redux • Consumerͷه๏ Hooks͕ೖΔલͷॻ͖ํ • const { store
: { dispatch } } = useContext(ReactReduxContext)
ࢀߟϥΠϒϥϦ ContextΛ͏ϥΠϒϥϦ2 React Tracked • Super fast React global/shared state
with context and hooks • Pure ReactͩͱύϑΥʔϚϯε͕͋ΔͷͰͦΕΛղܾ͠ɺ͞Βʹ؆ܿʹॻ͚Δ
͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠