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JavaScript AST入門 〜自作Babelプラグインを添えて〜

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July 15, 2025
Programming
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JavaScript AST入門 〜自作Babelプラグインを添えて〜

Avatar for yuuki-katsuta

yuuki-katsuta

July 15, 2025
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Transcript

  1. +BWB4DSJQU"45ೖ໳ ʙࣗ࡞#BCFMϓϥάΠϯΛఴ͑ͯʙ ࣾ಺ษڧձࢿྉ ೥݄

  2. ࣗ࡞#BCFMϓϥάΠϯΛ࡞ͬͯɺ"45ʹֶ͍ͭͯΜͩ࿩ "45Λ׆༻ͯ͠ɺຊ൪؀ڥͷ)5.-͔Βςετ༻ͷ)5.-ଐੑ EBUBUFTUJE Λ࡟আ͢ΔπʔϧΛ࡞ͬͯΈͨɻ ͦͷաఔͰීஈԿؾͳ͘࢖͍ͬͯΔπʔϧͷཪଆ͕গ͠஌ΕͨͷͰڞ༗Ͱ͖Ε͹ͱࢥ͍·͢ɻ ࿩͢͜ͱ

  3.  "45ͱ͸ ؆୯ͳ֓ཁΛઆ໌  #BCFMͱ͸ +BWB4DSJQUͷτϥϯεύΠϧͷ࢓૊Έ  ࣗ࡞#BCFMϓϥάΠϯʹΑΔ"45ૢ࡞ͷ࣮ફ ࿩͢͜ͱ

  4. "45ͱ͸ ந৅ߏจ໦ʢͪΎ͏͠ΐ͏͜͏ͿΜ͗ɺӳBCTUSBDUTZOUBYUSFFɺ"45ʣ͸ɺ௨ৗͷߏจ໦ʢ۩৅ߏ จ໦͋Δ͍͸ղੳ໦ͱ΋ݴ͏ʣ͔Βɺݴޠͷҙຯʹؔ܎ͳ͍৘ใΛऔΓআ͖ɺҙຯʹؔ܎͋Δ৘ใͷ ΈΛऔΓग़ͨ͠ʢந৅ͨ͠ʣ໦ߏ଄ͷ໦Ͱ͋Δɻ IUUQTKBXJLJQFEJBPSHXJLJ&"#%&#"&"#&&$"

  5. "45ͱ͸ ந৅ߏจ໦ʢͪΎ͏͠ΐ͏͜͏ͿΜ͗ɺӳBCTUSBDUTZOUBYUSFFɺ"45ʣ͸ɺ௨ৗͷߏจ໦ʢ۩৅ߏ จ໦͋Δ͍͸ղੳ໦ͱ΋ݴ͏ʣ͔Βɺݴޠͷҙຯʹؔ܎ͳ͍৘ใΛऔΓআ͖ɺҙຯʹؔ܎͋Δ৘ใͷ ΈΛऔΓग़ͨ͠ʢந৅ͨ͠ʣ໦ߏ଄ͷ໦Ͱ͋Δɻ IUUQTKBXJLJQFEJBPSHXJLJ&"#%&#"&"#&&$" ˠϓϩάϥϜίʔυΛ໦ߏ଄Ͱදݱͨ͠΋ͷ ˠσʔλߏ଄Λද͢

  6. "45ͱ͸

  7. "45ͱ͸

  8. "45ੜ੒ͷྲྀΕ ࢀߟαΠτɿIUUQTFTQSJNBPSHEFNPQBSTFIUNM

  9. ࢀߟαΠτɿIUUQTFTQSJNBPSHEFNPQBSTFIUNM "45ੜ੒ͷྲྀΕ

  10.  "45ͱ͸ ؆୯ͳ֓ཁΛઆ໌  #BCFMͱ͸ +BWB4DSJQUͷτϥϯεύΠϧͷ࢓૊Έ  ࣗ࡞#BCFMϓϥάΠϯʹΑΔ"45ૢ࡞ͷ࣮ફ

  11. #BCFMͱ͸ ֦ுߏจΛϒϥ΢βΤϯδϯ͕ཧղͰ͖ΔΑ͏ͳܗࣜʹม׵͢Δ w BTZODBXBJUߏจˠ1SPNJTF w Ξϩʔؔ਺ w +49 Ϟμϯͳ+BWB4DSJQUˠඪ४తͳ+BWB4DSJQU΁ͷߏจม׵

  12. #BCFMͷ࢓૊Έ ϓϩάϥϜίʔυΛ"45ʹม׵͢Δ ม׵ޙ

  13. σʔλߏ଄Λม׵ ม׵ޙ 'VODUJPO&YQSFTTJPOʹม׵ #BCFMͷ࢓૊Έ

  14. "45ΛϓϩάϥϜίʔυʹ໭͢ ม׵લ ม׵ޙ #BCFMͷ࢓૊Έ

  15. 5SBOTGPSNॲཧΛ֦ு͢Δ͜ͱ͕Ͱ͖Δ ˠඪ४ͷม׵͚ͩͰ͸ͳ͘ɺಠࣗͷϧʔϧΛ௥ՃͰ͖Δ ͜ΕΒ͸#BCFMϓϥάΠϯͱͯ͠࡞੒Ͱ͖Δ ඪ४ϓϥάΠϯɿ +49ˠ3FBDUDSFBUF&MFNFOU Ξϩʔؔ਺ˠGVODUJPO ࣗ࡞ϓϥάΠϯɿ ςετଐੑͷࣗಈ࡟আˡࠓ೔࡞ͬͨ΋ͷʂ EFCVHίʔυͷࣗಈ࡟আ #BCFMΛΧελϚΠζ͢Δ

  16. ࣗ࡞#BCFMϓϥάΠϯʹΑΔ"45ૢ࡞ͷ࣮ફ

  17. ͜ΕΛ࣮ݱ͍ͨ͠

  18. ຊ൪؀ڥͷΈಛఆͷ)5.-ଐੑΛ࡟আ͍ͨ͠ ͜ΕΛ࣮ݱ͍ͨ͠

  19. ࣮૷಺༰

  20. ࣮૷಺༰ ଐੑͷ໊લΛऔಘ ࡟আର৅ͳΒ࡟আ +49"UUSJCVUFͱ͍͏ϊʔυʹ๚໰ͨ͠ ʢ&45SFFͱ͍͏ඪ४࢓༷Ͱఆٛ͞Εͨϊʔυʣ

  21. "45&YQMPSFSΛ׆༻͠Α͏

  22. "45Λ׆༻͍ͯ͠Δ਎ۙͳπʔϧ IUUQTHJUIVCDPNGBDFCPPLSFBDUCMPCNBJODPNQJMFS QBDLBHFTCBCFMQMVHJOSFBDUDPNQJMFSTSD#BCFM#BCFM1MVHJOUT 3FBDU$PNQJMFS 1SFUUJFS IUUQTHJUIVCDPNQSFUUJFSQSFUUJFS

  23. ·ͱΊ w ։ൃ࣌ͷσόοΫࢧԉ w ։ൃ޲͚ͱຊ൪޲͚ʹίʔυΛม׵͢Δ w େྔͷιʔείʔυͷҰׅஔ͖׵͑ w ϦϑΝΫλϦϯάπʔϧ࡞੒ "45ͰͰ͖Δ͜ͱ

    ˞ιʔείʔυࣗମΛॻ͖׵͍͑ͨ৔߹͸UTNPSQIͳͲͷผͷπʔϧ͕ద͍ͯ͠·͢ɻ

  24. ࢀߟจݙ wॻ੶ɿ'MVFOU3FBDU wॻ੶ɿ+BWB4DSJQU"45ೖ໳ɹιʔεΛղੳɾՃ޻ͯ͠ੜ࢈ੑʹࠩΛ͚ͭΔʂ wIUUQTBTUFYQMPSFSOFU wIUUQTHJUIVCDPNKBNJFCVJMETCBCFMIBOECPPL wIUUQTHJUIVCDPNCBCFMCBCFMCMPCNBJOQBDLBHFTCBCFMQBSTFSBTUTQFDNE wIUUQTHJUIVCDPNFTUSFFFTUSFF