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叱られて覚えるES2015
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Sota Sugiura
July 02, 2016
Programming
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1.6k
叱られて覚えるES2015
YAP(achimon)C::Asia Hachioji 2016 LT 発表資料
Sota Sugiura
July 02, 2016
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Transcript
ࣤΒΕ֮ͯ͑Δ &4 !TPUB :"1 BDIJNPO $"TJB)BDIJPKJ-JHIUJOH5BML
ࣗݾհ w !TPUB w +4ྺ w ͖ͳݴ༿ɿ7 w ݏ͍ͳݴ༿ɿ*OUFSOFU&YQMPSFS
&4
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&4ͱͷҧ͍ w લճόʔδϣϯ͔Βͷมߋ͕ΊͪΌͪ͘Όଟ͍ w ྆खͷࢦͰऩ·Βͳ͍ͷ৽ػߏ͕ʜ w ࠓ·ͰͭΒ͔ͬͨ+4ͷͷଟ͕͘ղܾ͞Εͨ
#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 ॓ˠࣤΒΕ͔ͯΒΔ
ࠓ·Ͱͷਓੜ w ॓ˠࣤΒΕ͔ͯΒΔ w Ոࣄ
ࠓ·Ͱͷਓੜ w ॓ˠࣤΒΕ͔ͯΒΔ w ՈࣄˠࣤΒΕ͔ͯΒΔ
ࠓ·Ͱͷਓੜ w ॓ˠࣤΒΕ͔ͯΒΔ w ՈࣄˠࣤΒΕ͔ͯΒΔ w डݧษڧ
ࠓ·Ͱͷਓੜ w ॓ˠࣤΒΕ͔ͯΒΔ w ՈࣄˠࣤΒΕ͔ͯΒΔ w डݧษڧˠࣤΒΕ͔ͯΒΔ
ࠓ·Ͱͷਓੜ w ॓ˠࣤΒΕ͔ͯΒΔ w ՈࣄˠࣤΒΕ͔ͯΒΔ w डݧษڧˠࣤΒΕ͔ͯΒΔ w ࣄ
ࠓ·Ͱͷਓੜ w ॓ˠࣤΒΕ͔ͯΒΔ w ՈࣄˠࣤΒΕ͔ͯΒΔ w डݧษڧˠࣤΒΕ͔ͯΒΔ w ࣄˠࣤΒΕ͔ͯΒຊؾͩ͢
ʮ͓ࣤΓʯͦ͜Ϟνϕʔγϣϯ w ਓࣤΒΕΔͱؤுΕΔ w զʑͷۀքͰ SZ
ٹੈओΛ୳͢ʜ +4จ๏Λࣤͬͯ͘ΕΔਓ͍ͳ͍ͩΖ͏͔
ٹੈओΛ୳͢ʜ +4จ๏Λࣤͬͯ͘ΕΔਓ͍ͳ͍ͩΖ͏͔
&4-JOU w +BWB4DSJQUͷจ๏νΣοΧʔ w ඇৗʹ๛ͳϧʔϧ͕༻ҙ͞ΕͯΔ w ଞͷਓͷϧʔϧϑΝΠϧΛJNQPSU͢Δ͜ͱ͕Մೳ
͍ΖΜͳϧʔϧ w FTMJOUDPOpHFTMJOU w FTMJOUDPOpHBJSCOC w FTMJOUDPOpHHPPHMF w FTMJOUDPOpHTUBOEBSE w
FUD
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ͯ͜ͱͰ w "JSCOCϧʔϧͰ&4Λ֮͑Δ
ҧ͏ ʄшʄ ސ٬ͷٻΊͯΔͷͦ͏͡Όͳ͍
ސ٬ͷຊʹඞཁͩͬͨͷ ʴ
ސ٬ͷຊʹඞཁͩͬͨͷ ⋵ 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
%&.0
݁Ռ w ίʔυྔߦ 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 DPOTUΛ͑ ࠶ೖ͠ͳ͍ͳΒDPOTU͑ 0CKFDUTIPSUIBOEͰॻ͚Δͥ
ଞʹʜ w ඇৗʹଟ͘ͷϧʔϧ͕ఆٛ͞Ε͍ͯΔ w ͬͯΔه๏Ͱؤுͬͯॻ͍ͯɺ࿙ΕͨͷΛ &4-JOUʹࣤͬͯΒ͏ͱΑ͍
·ͱΊ
େࣄͳͷϞνϕʔγϣϯ w ࣤΒΕΔͱؤுΕΔ w ࣤͬͯ͘ΕΔ͜ͱΛ͝๙ඒͩͱࢥ͑ͬͱؤ ுΕΔ w &4-JOUʹࣤͬͯΒָͬͯ͘͠&4ֶश
Ҏ্ɺղࢄʂ