叱られて覚えるES2015

ࣤΒΕ֮ͯ͑Δ &4 !TPUB :"1 BDIJNPO $"TJB)BDIJPKJ-JHIUJOH5BML

ࣗݾ঺հ w !TPUB w +4ྺ೥ w ޷͖ͳݴ༿ɿ7 w ݏ͍ͳݴ༿ɿ*OUFSOFU&YQMPSFS

&4 w ࡢ೥ϦϦʔε͞Εͨ&$."4DSJQUͷ৽͍͠όʔ δϣϯ w ʲॕʳ&4΋͜ͷલग़ͨΑ

&4ͱͷҧ͍ w લճόʔδϣϯ͔Βͷมߋ͕ΊͪΌͪ͘Όଟ͍ w ྆खͷࢦͰऩ·Βͳ͍਺ͷ৽ػߏ͕ʜ w ࠓ·ͰͭΒ͔ͬͨ+4ͷ໰୊ͷଟ͕͘ղܾ͞Εͨ

#VU ৽ػೳଟ͓͗͢΅͑ΒΕͳ͍ʜ Ňŏ﹏ŏ

/FXGFBUVSFT w DPOTUMFU w BSSPXGVODUJPO w PCKFDUMJUFSBM w DMBTTTZOUBY w
1SPYZ w 4ZNCPM w FYQPSUJNQPSU w TQSFBEPQFSBUPS w EFGBVMUQBSBNFUFS w BOENPSF ꒪⌓꒪

֮͑Δͷେมʜ

͜͏͍͏࣌Ͳ͏͖͚ͯͨͬ͠ʜ ɾТɾʆ

ࠓ·Ͱͷਓੜ w ॓୊

ࠓ·Ͱͷਓੜ w ॓୊ˠࣤΒΕ͔ͯΒ΍Δ

ࠓ·Ͱͷਓੜ w ॓୊ˠࣤΒΕ͔ͯΒ΍Δ w Ոࣄ

ࠓ·Ͱͷਓੜ w ॓୊ˠࣤΒΕ͔ͯΒ΍Δ w ՈࣄˠࣤΒΕ͔ͯΒ΍Δ

ࠓ·Ͱͷਓੜ w ॓୊ˠࣤΒΕ͔ͯΒ΍Δ w ՈࣄˠࣤΒΕ͔ͯΒ΍Δ w डݧษڧ

ࠓ·Ͱͷਓੜ w ॓୊ˠࣤΒΕ͔ͯΒ΍Δ w ՈࣄˠࣤΒΕ͔ͯΒ΍Δ w डݧษڧˠࣤΒΕ͔ͯΒ΍Δ

ࠓ·Ͱͷਓੜ w ॓୊ˠࣤΒΕ͔ͯΒ΍Δ w ՈࣄˠࣤΒΕ͔ͯΒ΍Δ w डݧษڧˠࣤΒΕ͔ͯΒ΍Δ w ࢓ࣄ

ࠓ·Ͱͷਓੜ w ॓୊ˠࣤΒΕ͔ͯΒ΍Δ w ՈࣄˠࣤΒΕ͔ͯΒ΍Δ w डݧษڧˠࣤΒΕ͔ͯΒ΍Δ w ࢓ࣄˠࣤΒΕ͔ͯΒຊؾͩ͢

ʮ͓ࣤΓʯͦ͜Ϟνϕʔγϣϯ w ਓ͸ࣤΒΕΔͱؤுΕΔ w զʑͷۀքͰ͸ SZ

ٹੈओΛ୳͢ʜ +4จ๏Λࣤͬͯ͘ΕΔਓ͸͍ͳ͍ͩΖ͏͔

&4-JOU w +BWB4DSJQUͷจ๏νΣοΧʔ w ඇৗʹ๛෋ͳϧʔϧ͕༻ҙ͞ΕͯΔ w ଞͷਓͷϧʔϧϑΝΠϧΛJNQPSU͢Δ͜ͱ͕Մೳ

͍ΖΜͳϧʔϧ w FTMJOUDPOpHFTMJOU w FTMJOUDPOpHBJSCOC w FTMJOUDPOpHHPPHMF w FTMJOUDPOpHTUBOEBSE w
FUD

FTMJOUDPOpHBJSCOC w &4༻ϧʔϧΛҰ൪࠷ॳʹ࡞Γ࢝Ίͨ w ਓؾϧʔϧ w &4ه๏Ͱॻ͘ͱΊͪΌͪ͘ΌౖΒΕΔ w IUUQTHJUIVCDPNBJSCOCKBWBTDSJQUCMPCNBTUFS QBDLBHFTFTMJOUDPOpHBJSCOCCBTFSVMFTFTKT

ͯ͜ͱͰ w "JSCOCϧʔϧͰ&4Λ֮͑Δ

ҧ͏ ʄшʄ ސ٬ͷٻΊͯΔ΋ͷ͸ͦ͏͡Όͳ͍

ސ٬ͷຊ౰ʹඞཁͩͬͨ΋ͷ ʴ

ސ٬ͷຊ౰ʹඞཁͩͬͨ΋ͷ ⋵ ʴ

͜͜·Ͱ͸৺ߏ͑ͷ࿩ ࣮ࡍʹࢼͯ͠ΈΔ

ਓப w IUUQTHJUIVCDPNTPUB1BSUZ w 3FBDU /PEFKTͷੲॻ͍ͨΞϓϦΛνΣοΫ ͢Δ

*OTUBMM $ npm i -D eslint \ eslint-config-airbnb \ eslint-plugin-import
\ eslint-plugin-react

FTMJOUSD { "extends": "airbnb" }

$PNNBOE $ ./node_modules/eslint/bin/eslint.js src/ # or $ npm run lint
# package.jsonͰ”eslint src/“Λఆٛ

݁Ռ w ίʔυྔ͸ߦ w ͷΤϥʔͱͷܯࠂ͕ग़ͨ w զʑͷۀքE SZ

&4༝དྷͷΤϥʔ • Unexpected var, use let or const instead •
'option' is never reassigned, use 'const' instead • Expected property shorthand

&4༝དྷͷΤϥʔ • Unexpected var, use let or const instead •
'option' is never reassigned, use 'const' instead • Expected property shorthand WBS͡Όͳͯ͘MFU DPOTUΛ࢖͑ ࠶୅ೖ͠ͳ͍ͳΒDPOTU࢖͑ 0CKFDUTIPSUIBOEͰॻ͚Δͥ

ଞʹ΋ʜ w ඇৗʹଟ͘ͷϧʔϧ͕ఆٛ͞Ε͍ͯΔ w ஌ͬͯΔه๏Ͱؤுͬͯॻ͍ͯɺ࿙Εͨ΋ͷΛ &4-JOUʹࣤͬͯ΋Β͏ͱΑ͍

·ͱΊ

େࣄͳͷ͸Ϟνϕʔγϣϯ w ࣤΒΕΔͱؤுΕΔ w ࣤͬͯ͘ΕΔ͜ͱΛ͝๙ඒͩͱࢥ͑͹΋ͬͱؤ ுΕΔ w &4-JOUʹࣤͬͯ΋Βָͬͯ͘͠&4ֶश

Ҏ্ɺղࢄʂ

叱られて覚えるES2015

叱られて覚えるES2015

More Decks by Sota Sugiura

Other Decks in Programming

Featured

Transcript