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circled9
November 30, 2018
Technology
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Hello React hooks
water-cell tech night #2で話したreact hooksの紹介スライドです。
circled9
November 30, 2018
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Transcript
ハロー リアクト フック @circled9 2018-11-30 WCI Tech night #2
Matsui Masashi দҪਖ਼ࢤ DJSDMFE 'SPOUFOE&OHJOFFS !XBUFSDFMMJOD !2
ࠓհ͢Δͷ 3FBDUWͷ৽ػೳ !3
)PPLT"1* !4
Hooks are a new feature proposal that lets you use
state and other React features without writing a class. They’re currently in React v16.7.0-alpha and being discussed in an open RFC. IUUQTSFBDUKTPSHEPDTIPPLTSFGFSFODFIUNMΑΓҾ༻ !5
ҙ༁ w )PPLT3FBDUͷ࣍ͷόʔδϣϯ Ͱ͑Δ༧ఆͷͭ w DMBTTͳ͠ͰTUBUFͱ͔͕͑Δ w ·ͩ3'$ͳײ͡Ͱ༷ࡦఆத !6
/P#SFBLJOH$IBOHFT w ͏ͷҙͩ͠ޙํޓੑͱ͔ Ϳͬյ͞ͳ͍Α w ผʹDMBTTΛͳ͘͢ؾͳ͍Α w 3FBDUͷߟ͑ํίϯηϓτͱ͔ มΘΒͳ͍Α !7
)PPLT"1*ͷհ !8
ࠓհ͢Δͷ w VTF4UBUF w VTF&GGFDU w VTF3FEVDFS !9
ࠓհ͠ͳ͍ͷ w VTF$POUFYU w ଞɺ"EEJUJPOBM)PPLTͷେ w VTF$BMMCBDL VTF.FNP VTF3FG
FUD !10
VTF4UBUF w TUBUF͕͑Δ w ݱࡏͷঢ়ଶͱঢ়ଶΛม͑ΔؔΛฦ ͢ w چདྷͷTFU4UBUFͷΑ͏ʹΦϒδΣ ΫτͷϚʔδ͠ͳ͍ͷͰҙ !11
VTF&GGFDU w ඳը͕ऴΘ͔ͬͯΒ࣮ߦ͞ΕΔ w %JE.PVOU%JE6QEBUFʹ͍ۙ w ୈೋҾͰࢹ͢ΔରΛࢦఆ͢Δ w ୈҰҾͷฦΓͷؔͰΫϦʔϯ Ξοϓ͢Δ
!12
VTF3FEVDFS w 'MVYϥΠΫͳ͜ͱ͕Ͱ͖Δ !13
ॴײ w SFDPNQPTFSFEVYͳͲΛͬ ͯͬͯͨ͜ͱͷҰ෦3FBDU͚ͩ ͰͰ͖ͦ͏ w ͠Β͘ϕετϓϥΫςΟεΛ ࡧ͢Δ͜ͱʹͳΓͦ͏ !14
&OKPZ)PPLT !15