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
Vuejs Composition Function の概要
Search
vuedrink
June 10, 2019
Programming
1
730
Vuejs Composition Function の概要
By Kaoru Hosakawa
From AppSocially KK
At Vue.js Tokyo Drinkup
#vuedrink
vuedrink
June 10, 2019
Tweet
Share
More Decks by vuedrink
See All by vuedrink
Publishing Vue Components to NPM
vuedrink
1
580
Other Decks in Programming
See All in Programming
AWS発のAIエディタKiroを使ってみた
iriikeita
1
150
UbieのAIパートナーを支えるコンテキストエンジニアリング実践
syucream
2
810
AIを活用し、今後に備えるための技術知識 / Basic Knowledge to Utilize AI
kishida
19
4.5k
OSS開発者という働き方
andpad
5
1.6k
Improving my own Ruby thereafter
sisshiki1969
1
150
KessokuでDIでもgoroutineを活用する / Go Connect #6
mazrean
0
140
為你自己學 Python - 冷知識篇
eddie
1
340
Microsoft Orleans, Daprのアクターモデルを使い効率的に開発、デプロイを行うためのSekibanの試行錯誤 / Sekiban: Exploring Efficient Development and Deployment with Microsoft Orleans and Dapr Actor Models
tomohisa
0
230
rage against annotate_predecessor
junk0612
0
160
速いWebフレームワークを作る
yusukebe
5
1.6k
Kiroで始めるAI-DLC
kaonash
2
520
機能追加とリーダー業務の類似性
rinchoku
2
540
Featured
See All Featured
Visualization
eitanlees
147
16k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
46
7.6k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
131
19k
Embracing the Ebb and Flow
colly
87
4.8k
Done Done
chrislema
185
16k
Site-Speed That Sticks
csswizardry
10
810
We Have a Design System, Now What?
morganepeng
53
7.8k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
111
20k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
284
13k
It's Worth the Effort
3n
187
28k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.4k
Building an army of robots
kneath
306
46k
Transcript
7VFKT$PNQPTJUJPO'VODUJPOͷ֓ཁ LBPSVIPTPLBXB!DIBUDFOUFSJP "QQ4PDJBMMZגࣜձࣾ
ಈػ
ϩδοΫͷΈཱͯ w 7VFYͰɺίϯϙʔωϯτϕʔεͷ"1*Λ༻͍ͯɺϩδοΫΛΧϓηϧԽ͍ͯ͠Δɻ NJYJOTɺߴ֊ίϯϙʔωϯτɺSFOEFSMFTTίϯϙʔωϯτͳͲͷύλʔϯ͕ଘࡏ͢Δ ͕ɺͦΕͧΕ͕ܽ͋Δɻ w QSPQFSUZͷग़Ͳ͜Ζ͕ෆ໌֬ɺྫ͑ɺͲͷNJYJO͔Βདྷ͍ͯΔͷ͔Θ͔ΓͮΒ͍ w OBNFTQBDFͷিಥɺNJYJOͷϝιου໊ w
ύϑΥʔϚϯεɺߴ֊ίϯϙʔωϯτSFOEFSMFTTίϯϙʔωϯτɺՃͷίϯ ϙʔωϯτ͕ඞཁ w ͦΕʹରͯ͠ɺؔϕʔεͷ"1*ɺ͜ΕΒͷ͕ܽͳ͍ɻϩδοΫΛநग़͠ɺ ʮDPNQPTJUJPOGVODUJPOʯʹ·ͱΊɺϦΞΫςΟϒͳঢ়ଶΛ͢Α͏ʹ͍ͯ͠Δɻ
&YBNQMF function useMouse() { const x = value(0) const y
= value(0) const update = e => { x.value = e.pageX y.value = e.pageY } onMounted(() => { window.addEventListener('mousemove', update) }) onUnmounted(() => { window.removeEventListener('mousemove', update) }) return { x, y } } // in consuming component const Component = { setup() { const { x, y } = useMouse() const { z } = useOtherLogic() return { x, y, z } }, template: `<div>{{ x }} {{ y }} {{ z }}</div>` }
ͦͷଞ w ܕਪ w ͷΰʔϧɿΑΓྑ͍5ZQF4DSJQUܕਪͷαϙʔτ w όϯυϧαΠζ w ؔ"1*ɺ໊લ͖&4FYQPSUTͰΤΩεϙʔτ͞ΕɺΦϯσϚϯυ ͰΠϯϙʔτ͞ΕΔͷͰɺσουίʔυআڈʢUSFFTIBLFʣՄೳ
w ؔ"1*Ϋϥε"1*ΑΓѹॖ͕ߴ͍
ৄࡉ
TFUVQؔ w ίϯϙʔωϯτͷઃఆΛߦ͏ؔ w QSPQTͷ͕ղܾ͠ɺίϯϙʔω ϯτͷΠϯελϯε͕ੜ͞Εͨ ޙɺݺͼग़͞ΕΔ w QSPQTϦΞΫςΟϒ const
MyComponent = { props: { name: String }, setup(props) { console.log(props.name) } }
4UBUF w TFUVQؔɺEBUB ͷΑ͏ʹ UFNQMBUFඳը༻ʹΦϒδΣΫτΛ ฦ͢͜ͱ͕Մೳ w WBMVFXSBQQFSΛͬͯɺTFUVQ ؔͰɺͷมߋ͕ՄೳͳϦΞ ΫςΟϒมΛ࡞Ͱ͖Δʢྫɿ
NTHʣ import { value } from 'vue' const MyComponent = { setup(props) { const msg = value('hello') const appendName = () => { msg.value = `hello ${props.name}` } return { msg, appendName } }, template: `<div @click="appendName">{{ msg }}</div>` }
7BMVF8SBQQFS w +BWB4DSJQUͷϓϦϛςΟϒʢɺจࣈྻͳͲʣɺ͠ɻΑͬͯɺ ؔͷΓ͕มߋͯ͠ߋ৽͞ΕͨΛऔಘ͢Δ͜ͱ͕Ͱ͖ͳ͍ɻ w 7BMVFXSBQQFSΛ͏͜ͱʹΑͬͯҙͷܕΛ࣋ͭΛࢀর͢͠Δ͜ ͱ͕Ͱ͖ΔɻΓɺϦΞΫςΟϒʹͳΓৗʹ࠷৽ʹΛऔಘ͢Δ͜ͱ ͕Մೳɻ
7BMVF6OXSBQQJOH w แ·ΕͨɺSFOEFSίϯςΩ ετϦΞΫςΟϒͳΦϒδΣ ΫτͷೖΕࢠϓϩύςΟ ʢྫɿDPVOUʣͰɺแ͕ղ ͔ΕɺWBMVFͳ͠ͰΞΫηε͢ Δ͜ͱ͕Ͱ͖Δɻ const count
= value(0) const obj = state({ count }) console.log(obj.count) // 0 obj.count++ console.log(obj.count) // 1 console.log(count.value) // 1 count.value++ console.log(obj.count) // 2 console.log(count.value) // 2
$PNQVUFE7BMVFT w $PNQVUFEWBMVFYDPNQVUFE QSPQFSUZͷΑ͏ʹɺґଘ͍ͯ͠Δ Λࢹ͠ɺ͕มߋͨ࣌͠ͷΈ DPNQVUFEWBMVFͷ࠶ܭࢉ͕࣮ࢪ͞ ΕΔɻ w ॻ͖ࠐΈՄೳͳDPNQVUFEWBMVFΛ࡞ Δ߹ɺTFUUFSΛ༻ҙ͢Δɻ
const count = value(0) const writableComputed = computed( // read () => count.value + 1, // write val => { count.value = val - 1 } )
8BUDIFST w XBUDIΛͬͯϦΞΫςΟϒͳε ςʔτΛࢹ͠ɺ෭࡞༻Λى͜͢ ͜ͱ͕Մೳ w ୈ̍Ҿ͕ιʔεʢHFUUFSɺWBMVF ϥούʔɺྻʣɺୈ̎Ҿ͕ ίʔϧόοΫ const
MyComponent = { props: { id: number }, setup(props) { const data = value(null) watch(() => props.id, async (id) => { data.value = await fetchData(id) }) } }
-JGFDZDMF)PPLT w શͯͷMJGFDZDMFIPPLTʹରԠ ͢ΔPO999͕ؔ༻ҙ͞ΕΔ import { onMounted, onUpdated, onUnmounted }
from 'vue' const MyComponent = { setup() { onMounted(() => { console.log('mounted!') }) onUpdated(() => { console.log('updated!') }) onUnmounted(() => { console.log('unmounted!') }) } }
%FQFOEFODZ*OKFDUJPO w ίϯϙʔωϯτ͕QSPWJEF ͨ͠Λมߋͨ࣌͠ɺࢠίϯ ϙʔωϯτߋ৽͕ߦΘΕΔ import { provide, inject }
from 'vue' const CountSymbol = Symbol() const Ancestor = { setup() { // providing a value can make it reactive const count = value(0) provide({ [CountSymbol]: count }) } } const Descendent = { setup() { const count = inject(CountSymbol) return { count } } }
ܽ w ίϯϙʔωϯτఆٛͷϦϑϨΫγϣϯ͓Αͼૢ࡞͕͘͠ͳͬͨ w ͔͠͠ɺϦϑϨΫγϣϯૢ࡞੬͍͠ϦεΩʔͳͷͰٯʹྑ͍͜ͱͳͷ͔͠Εͳ͍ɻؔ "1*ͰΧόʔͰ͖Δͱߟ͍͑ͯΔɻ w ίϯϙʔωϯτΛPQUJPOHSPVQ͝ͱʹ·ͱΊΔඞཁ͕ͳ͍ͨΊɺεύήοςΟίʔυΛॿ͢ Δ w
ίϯϙʔωϯτͷPQUJPOΛ͏ͱཧ͞Ε͍ͯΔΑ͏ʹݟ͑Δ͕ɺϩδοΫ֤PQUJPOʹ ࢄ͞Ε͍ͯΔɻྫ͑ɺσʔλΛऔಘ͢ΔʹɺQSPQTɺEBUB ɺNPVOUFEɺXBUDI͕ඞཁɻ w ؔ"1*ͷ߹ɺҰͭͷؔʹϩδοΫΛ·ͱΊΔ͜ͱ͕Ͱ͖ΔɻڊେͳTFUVQ͕ؔͰ͖ͨ ࣌ɺෳͷؔʹղ͢ΕΑ͍ɻ
ࢀরจݙ rfcs/active-rfcs/0000-function-api