Building native apps with scala.js

by Shinpei Maruyama

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CZ͠Μ΃͍BLBೣܕ஝Իػ #VJMEJOHOBUJWF BQQTXJUI 4DBMBKT

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BCPVUNF w ג ϝσΟϩϜ w ීஈ͸4DBMBͱ͔+4ͱ͔೔ຊޠ ͱ͔ w 1FSM 3VCZ΋ͨ͠ͳΉఔ౓ʹ w UXJUUFS!TIJOQFJ

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BCPVUNF w 4DBMBKTͱ 3FBDU/BUJWFc&MFDUSPO ࢖ͬͯ झຯΞϓϦॻ͍ͨΓͯ͠Δ w #BDLMPHΫϥΠΞϯτ &MFDUSPO w ίʔυේΤσΟλ 3FBDU/BUJWF

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લఏ஌ࣝ

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4DBMBKT

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4DBMBKT w 4DBMBUP+BWB4DSJQUͳτϥϯ εύΠϥ w ϓϩμΫτͰ࢖͏ͱ͜Ζ͕૿͖͑ͯ ͍ͯΔ<ཁग़య>

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4DBMBKTϝϦοτ w 4DBMBͰ͋Δ͜ͱ w ;ͭ͏ʹ4DBMB w ҆શ w දݱྗߴ͍

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4DBMBKTσϝϦοτ w 4DBMBͰ͋Δ͜ͱ w 4DBMB͔Β+BWB4DSJQUͷੈքΛ ৮Ζ͏ͱ͢Δͱ్୺ʹۤ௧͕૿͑Δ w ಈతܕ෇͚ϥΠϒϥϦͱ͔ϒϥ΢βͷ "1*ͱ͔ʜʜ

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#VJMEJOHOBUJWF BQQTXJUI+4

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3FBDU/BUJWF w 3FBDUͰωΠςΟϒεϚϗΞϓϦ ͕࡞ΕΔ w 8FC7JFXͱ͔͡Όͳ͍ w 3FBDU͕/BUJWFͷϓϨθϯςʔ γϣϯ૚Λந৅Խ͍ͯ͠Δ

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&MFDUSPO w +4ͰσεΫτοϓωΠςΟϒΞϓ Ϧ͕࡞ΕΔ w த਎͸΄΅ϒϥ΢βΈ͍ͨͳ͔Μ͡

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ϝϦοτ w +4Ͱ͋Δ͜ͱ w ࢲݟ͚ͩͲɺωΠςΟϒॻ͚ΔϓϩάϥϚΑΓ+4ॻ ͚ΔϓϩάϥϚͷ΄͏͕਺͕ଟ͍ w 6*૊Ήͱ͖ͷ։ൃαΠΫϧ͕ૣ͘ճΔ w ׳ΕΔͱωΠςΟϒͷϏϧυ଴͕ͪ࣌ؒΉ͠Ζ͠Μ Ͳ͘ͳΔ w 91MBUͰ͋Δ͜ͱ w ͪΐͬͱਂೖΓ͢Δͱࢮ͵ͷͰ͜ͷ఺͸ແࢹ͠·͢

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Ϟνϕʔγϣϯ

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ຊԻ w 4DBMBͰωΠςΟϒΞϓϦॻ͖ͨ ͍ w ͳͥͳΒΘΕΘΕ͸4DBMB͕޷͖ ͔ͩΒ w ຊԻͰݴ͏ͱ͜Εׂ͕

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ݐલ w (6*ΞϓϦέʔγϣϯ͸ෳࡶͳঢ়ଶ Λ࣋ͭͨΊɺߏங͢Δͷ͕ඇৗʹΉ ͔͍ͣ͠ w ෳࡶͳ໰୊ྖҬʹରͯ͠͸4DBMBͷ Α͏ͳڧྗͳݴޠͰཱͪ޲͔͍͍ͨ

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ϐίʔϯʂ 4DBMBKTͷػӡʂ

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ൃ૝ w +4ͰωΠςΟϒΞϓϦॻ͚ΔͳΒ 4DBMBKTͰωΠςΟϒΞϓϦॻ͚ Δ͡ΌΜ w ѱຐతͻΒΊ͖ʜʜʂ

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ཱͪ޲͔͏΂͖น ͦͷ

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ϏϧυपΓͷ໰୊

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ϏϧυपΓͷ໰୊ w ͦ΋ͦ΋+4Ͱ͋Δఔ౓Ҏ্ෳࡶͳ (6*ΞϓϦΛ࡞ΔͳΒɺXFCQBDL ͕લఏͱͳ͍ͬͯΔ w 4DBMBKT͸TCUͰϏϧυ͢Δલఏ

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ϏϧυपΓͷ໰୊ w 4DBMBKTͷMPBEFS͋Δɻ͋Δʹ ͸͋Δ͕ʜʜ w ڊେϏϧυγεςϜͱڊେϏϧυγ εςϜΛڊେ࿈݁͢Δͷ͸ͪΐͬ ͱʜʜʢݸਓͷݟղͰ͢ʣ

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ཱͪ޲͔͏΂͖น ͦͷ

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΍ΘΒ͔͘࡞Γ͍ͨ ෦෼ WT ߗ͘࡞Γ͍ͨ෦෼

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ॊΒ͔͍΄͏͕͍͍෦෼ w ͱ͘ʹ3FBDU/BUJWFͱ͔Ͱ΍ΔͳΒɺ7JFX पΓͷίʔυ͸ૉͷ+4ͷ΄͏ָ͕ͩͬͨΓ ͢Δ w ϓϨʔϯͳΦϒδΣΫτ \lBzlCz^Έ͍ͨ ͳ΍ͭ ଟ༻͢Δ͠ɺ։ൃͯ͠ΔؒʹΩʔ΋ ΨϯΨϯมΘΔ w ฤू֬ೝͷαΠΫϧΛ͸΍͘ճ͍ͨ͠

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ߗ͍΄͏͕͍͍෦෼ w ͱ͸ݴ͑ɺෳࡶͳঢ়ଶ؅ཧ΍ϩδο ΫΛ+4Ͱॻ͘ͷ͸ͭΒ͍ɻ4DBMB ͳΒͳ͋ʜʜͬͯࢥ͏͜ͱଟ͍

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ιϦϡʔγϣϯͷ ͝঺հ

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ιϦϡʔγϣϯ w 6*૚͸ૉ௚ʹ+4ͷ6*ϑϨʔϜϫʔ ΫͰͦͷ··ॻ͘ w Ϟσϧ૚ҎԼΛ4DBMBKTͰॻ͘

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TCU ਤ WVFͩͱ͔KTY TDBMB JNQPSUͯ͠࢖͏ DPNQJMFEKT DPNQJMF͢Δ XFCQBDL

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.78 7JFX 8IBUFWFS .PEFM 6* -BZFS .PEFM -BZFS

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.78 7JFX 8IBUFWFS .PEFM &MFDUSPO΍Β 3FBDU/BUJWF΍Βͷ ౎߹ʹৼΓճ͞ΕΔ ෦෼ Ͳ͏ͤ ࣗ෼Ͱ ઃܭͯ͠ ॻ͘෦෼

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XJUI4DBMBKT 7VFPS3FBDU/BUJWF .PEFM 3FBDU 7VF FUDʜ 4DBMBKT $PNNBOE 2VFSZ &WFOU

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7VFPS3FBDU/BUJWF 7VFKTXJUI4DBMBKT .PEFM 4DBMBKT $PNNBOE 2VFSZ &WFOU JOWPLF ෭࡞༻ 3FBDU 7VF FUDʜ

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XJUI4DBMBKT 7VFPS3FBDU/BUJWF .PEFM 3FBDU 7VF FUDʜ 4DBMBKT $PNNBOE 2VFSZ &WFOU XBUDI

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7VFPS3FBDU/BUJWF 3FBDU 7VF FUDʜ 7VFKTXJUI4DBMBKT .PEFM $PNNBOE 2VFSZ &WFOU OPUJGZ 4DBMBKT

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7VFPS3FBDU/BUJWF 3FBDU 7VF FUDʜ 7VFKTXJUI4DBMBKT .PEFM Ͳ͏ͤ ࣗ෼Ͱ ઃܭͯ͠ ॻ͘෦෼ $PNNBOE 2VFSZ &WFOU GFUDI

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7VFPS3FBDU/BUJWF 3FBDU 7VF FUDʜ σʔλϑϩʔ͸୯ํ޲ .PEFM Ͳ͏ͤ ࣗ෼Ͱ ઃܭͯ͠ ॻ͘෦෼ $PNNBOE 2VFSZ &WFOU

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ίʔυྫ

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3FBDU/BUJWF෦෼

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3FBDU/BUJWF෦෼

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3FBDU/BUJWF෦෼

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;ͭ͏ͷ 3FBDU/BUJWF

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4DBMB෦෼

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;ͭ͏ͷ4DBMB

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ॴײ

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ॴײ w ΠϯϑϥετϥΫνϟϨΠϠʔͰ͸4DBMB͔Β +4ͷϥΠϒϥϦ΍"1*৮Δͷ͸ආ͚ΒΕͳ͍ w ͕͚ͬ͜͜͜͏ͭΒ͍ w ͦ͏ߟ͑Δͱɺ+4ͷ"1*ୟ͖·͘ΔΑ͏ͳ΍ͭ ͸ͪΐͬͱਏͦ͏ w 4DBMBͰΞϓϦॻ͚Δ͜ͱࣗମ͸ͱͯ΋ྑ͍ମ ݧΛಘΒΕΔ

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ॴײ w ϓϨθϯςʔγϣϯϨΠϠʔ͸ૉͷ +4ɺͦͷԼ͸શ෦4DBMBͱ͍͏ͷ ͸͔ͳΓମݧ͕ྑ͍ w 4DBMBͰωΠςΟϒΞϓϦ͸ॻ͚ ·͢ʂʂʂʂ

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·ͱΊ

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·ͱΊ w 4DBMBͰωΠςΟϒΞϓϦ͕࡞Γ͍ͨʂͱ ͍͏೤͍ࢥ͍͸࣮ݱՄೳͰ͋Δ͜ͱΛݟ͖ͯ ·ͨ͠ w 6*ʹ͍ۙ෦෼͸ɺ+4ͷ··΍Δͱ͏·͍͘ ͘͜ͱ͕ଟ͍͜ͱΛݟ͖ͯ·ͨ͠ w ਖ਼௚͜ͷํ޲ੑ͸͔ͳΓ͋Γͩͱࢥ͏ɺͱ͍ ͍͏ҙݟΛൃ৴͠·ͨ͠