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Babelで先取り次世代javascript
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Tsuyoshi Maeda
April 15, 2015
Programming
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43
Babelで先取り次世代javascript
introduce ES6 with Babel.
Tsuyoshi Maeda
April 15, 2015
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Transcript
#BCFMͰઌऔΓ࣍ੈ KBWBTDSJQU 5TVZPTIJ.BFEB
࣍ /PEFKTΛΠϯετʔϧ #BCFMͱ &4Ͱ͑ΔΑ͏ʹͳͬͨදతͳػೳɻ ߹Θͤͯ͏ͱศརͳπʔϧ
CSPXTFSJGZ HVMQ ࣮ࡍʹ&4ʹ৮ΕͯΈΑ͏
/PEFKTΛΠϯετʔϧ w ຊՈαΠτ͔ΒΠϯετʔϧ͢ΔͳΓɺOWNɾ OPEFFOWΛ͏ͳΓ͓͖ͳํ๏ͰͲ͏ͧɻ w Ҏલ(SVOUͷհΛͨ͠ͱ͖ʹ/PEFKTͷΠϯετʔϧํ๏Λ هड़ͯ͋͠ΔͷͰͪ͜ΒࢀߟʹͳΔ͔ͱɻ w IUUQXXXTMJEFTIBSFOFUUTVZPTIJNBFEB HSVOU
#BCFMͱ w &4 ࣍ੈ ͰΈࠐ·ΕΔػೳΛ͍ͪૣ͑͘ ΔΑ͏ʹ͢Δπʔϧɻ +BWB4DSJQU5SBOTQJMFS w ݩʑͷ໊લʮUPʯͱ͍͏໊લ͕ͩͬͨ
ʮ#BCFMʯͱ͍͏໊લʹมߋ͞Εͨɻ IUUQXXXJOGPRDPNOFXTCBCFMOFXOBNFGPSUP
&4ͰՃ͞Εͨओͳػೳ ʢαϯϓϧͰհ͢ΔͷΈʣ ! w "SSPX'VODUJPO w $MBTT w MFU DPOTU
มɾఆએݴ w 5FNQMBUF4USJOHT ! w ଞʹՃ͞ΕΔػೳͨ͘͞Μ͋ΔͷͰҎԼͷϖʔδࢀߟʹɻ IUUQTCBCFMKTJPEPDTMFBSOFT IUUQFTGFBUVSFTPSH#MPDL4DPQFE$POTUBOUT
"SSPX'VODUJPO w UIJTίϯςΩετ͕CJOE͞ΕΔɻ EPDVNFOUBEE&WFOU-JTUFOFS DMJDL F\ DPOTPMFMPH UIJT F
^ ! ˣҎԼͱಉ͡ ! WBSTFMGUIJT EPDVNFOUBEE&WFOU-JTUFOFS DMJDL GVODUJPO F \ DPOTPMFMPH TFMG F ^
$MBTT w ଞͷݴޠͷΑ͏ʹDMBTTͰίʔυΛॻ͘͜ͱ͕ग़དྷΔɻ ࠓ·ͰQSPUPUZQFΛར༻࣮ͯ͠ݱ͍ͯͨ͠ɻ GVODUJPO"OJNBM OBNF \ UIJT@OBNFOBNFccbEFGBVMUOBNF` ^
"OJNBMQSPUPUZQFHFU/BNFGVODUJPO \ SFUVSOUIJT@OBNF ^ ˣҎԼͱಉ͡ DMBTT"OJNBM\ DPOTUSVDUPS OBNFbEFGBVMUOBNF` \ UIJT@OBNFOBNF ^ HFU/BNF \ SFUVSOUIJT@OBNF ^ ^
MFUɾDPOTU มɾఆએݴ w MFU w มͷӨڹൣғ͕ϒϩοΫείʔϓʹͳΔɻ ʢWBSએݴؔείʔϓʣ w DPOTU w
Ұએݴͨ͠Β࠶ೖग़དྷͳ͍ɻ ίϯύΠϧΤϥʔ
5FNQMBUF4USJOHT w จࣈྻͰมల։͕Ͱ͖ΔΑ͏ʹͳΔɻ w όοΫΫΥʔτʮAAʯͰมΛғΉɻ GVODUJPOJOUSPEVDF pSTU/BNF MBTU/BNF \
SFUVSObNZOBNFJT` MBTU/BNF b` pSTU/BNFb` ^ ! ˣҎԼͱಉ͡ ! GVODUJPOJOUSPEVDF pSTU/BNF MBTU/BNF \ SFUVSOANZOBNFJT\MBTU/BNF^\pSTU/BNF^A ^
߹Θͤͯ͏ͱศརͳπʔϧ w &4ͰίʔυΛॻ͍ͯڍಈΛ֬ೝ͢Δͨͼʹ CBCFMίϚϯυΛୟ͘ͷඇޮɻ w CBCFMίϚϯυҎԼͷϖʔδΛࢀর IUUQTCBCFMKTJPEPDTVTBHFDMJ w ػೳ͝ͱʹDMBTTͰϑΝΠϧΛ͚ͯɺඞཁʹԠ ͯ͡֎෦ϑΝΠϧΛJNQPSU
SFRVJSF ͯ͠ɺ࠷ऴ తʹෳʹ͚ͨϑΝΠϧΛҰͭʹ·ͱΊΔ ͷ͕ࠓͬΆ͍ॻ͖ํɻ
߹Θͤͯ͏ͱศརͳπʔϧ w HVMQ w &4ͰίʔυΛॻ͍ͯڍಈΛ֬ೝ͢ΔͨͼʹCBCFMίϚϯυΛୟ͘ͷඇޮɻ w CBCFMίϚϯυҎԼͷϖʔδΛࢀর IUUQTCBCFMKTJPEPDTVTBHFDMJ w CSPXTFSJGZ
PSXFCQBDL w ػೳ͝ͱʹDMBTTͰϑΝΠϧΛ͚ͯɺඞཁʹԠͯ͡֎෦ϑΝΠϧΛJNQPSU SFRVJSF ͠ ͯɺ࠷ऴతʹෳʹ͚ͨϑΝΠϧΛҰͭʹ·ͱΊΔͷ͕ࠓͬΆ͍ॻ͖ํɻ
HVMQ w λεΫϥϯφʔ w λεΫͱʁ w ϑΝΠϧฤूอଘΛϑοΫʹίϯύΠϧ w ຊ൪ϦϦʔε࣌ʹߦ͏Ұ࿈࡞ۀͷొͳͲ w
TBTT BMU+4ͳͲͷίϯύΠϧ w ϑΝΠϧ࿈݁ w ϑΝΠϧѹॖ w IUUQHVMQKTDPN
CSPXTFSJGZ w αʔόʔαΠυ+4ͷϞδϡʔϧཧػߏ $PNNPO+4 ΛϒϥβଆͰ͑ΔΑ͏ʹ͢Δπʔϧɻ w چདྷ".% 3FRVJSF+4 ͰϞδϡʔϧཧΛͯ͠ɺඇ ಉظͰґଘϑΝΠϧΛϒϥβ্ͰಡΈࠐΉΓํ͕
ྲྀߦ͍͕ͬͯͨɺݱࡏͷओྲྀϒϥβଆ $PNNPO+4ͷॻ͖ํͰରԠͯ͠ɺґଘϑΝΠϧΛ͋Β ͔͡ΊίϯύΠϧͯ͠ղܾ͢ΔΓํʹͳ͍ͬͯΔɻ w ".%ɺ$PNNPO+4ʹ͍ͭͯࢀߟʹͳΔهࣄ IUUQUTVDIJLB[VOFUKBWBTDSJQUNPEVMF w IUUQCSPXTFSJGZPSH
࣮ࡍʹ&4ʹ৮ΕͯΈΑ͏ ҎԼͷαϯϓϧίʔυΛDMPOF IUUQTHJUIVCDPNEVZPKJ CBCFM@CSPXTFSJGZ@JO@HVMQ