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そのJavascript、全部TypeScriptにしちゃえ
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Taro Matsuzawa aka. btm
October 23, 2021
Technology
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そのJavascript、全部TypeScriptにしちゃえ
Open Source Conference 2021 Online/Fall LT
Taro Matsuzawa aka. btm
October 23, 2021
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Transcript
ͦͷJavascriptɺ શ෦TypeScriptʹͪ͠Ό͑ Taro Matsuzawa(@smellman)
ࣗݾհ ཧۭؒܥΤϯδχΞ ຊUNIXϢʔβձձ/Ұൠࣾஂ๏ਓOSGeoຊࢧ෦ཧࣄ/Ұൠࣾஂ๏ਓΦʔ ϓϯετϦʔτϚοϓϑΝϯσʔγϣϯδϟύϯϝϯόʔ ౦ژిػେֶOB/౦ژిػେֶCySecݱੜ breakcoreΫϥελ ͱݺΕͯ·͢
ʢୀࡁΈʣ
OSSͷ׆ಈ React NativeܥϥΠϒϥϦͷվम react-native-static-server (iOSରԠ), redux-persist (ϥΠϒϥϦΛ·Δ͝ͱ TypeScriptʹॻ͖͑Δ) ͳͲ OpenMapTilesϓϩδΣΫτͷߩݙɺཧؔ։ൃ༁
ckanext-spatial (Python3ରԠ) ͳͲ ͦͷଞɺؾ͕͘··ίʔυυΩϡϝϯτΛॻ͍ͯ·͢
redux-persist ReactͰΑ͘ΘΕΔঢ়ଶͷอ࣋Λ͢Δreduxʹؔ͢ΔϥΠϒϥϦ redux-persistΛ͏ͱঢ়ଶΛLocalStorage(Web)/AsyncStorage(React Native)ͳͲʹอ࣋ͯ͘͠ΕΔ εϚϗΞϓϦͰঢ়ଶΛอଘ͢ΔͷʹศརͳϥΠϒϥϦ
ಋೖΛݕ౼ͨ݁͠Ռ ϝϯςφϯε͕2͙Β͍์ஔ ϝϯςφʔ͕ډͳ͍ͱ͍͏issue͕์ஔ͞Ε͍ͯΔ Pull RequestԿ͔์ஔ ͳΜͱ͔͍ͨ͠
ιʔείʔυΛಡΜͰΈΔ οɺFlowͬͯΔ…
Flow FLOW IS A STATIC TYPE CHECKER FOR JAVASCRIPT Facebook͕࡞ͬͨJavascriptͷ੩తܕνΣοΧʔ
Javascriptʹແཧཧܕͷ֓೦ΛೖΕΔ ΊͬͪΌಡΈͮΒ͍ʼʻ
ܕೖΕΔͳΒ ͏TypeScriptͰ͍͍͡ΌΜʂ
͍͍͡ΌΜ Flow͕·͡ϝϯςφϯεͷํ͕Θ͔ΒΜ VSCode͕Flowͷόʔδϣϯ͕ҧ͏ͱΤϥʔΛు͖·͘Δ ͦ͜·ͰͪΌΜͱܕ͚͕͞Ε͍ͯΔΘ͚Ͱͳ͍ ໌ࣔతʹanyͬͯॻ͖͍ͨ͡ΌΜ͔͢
ͱ͍͏Θ͚Ͱ
ͬͨ͜ͱ શ෦TypeScriptԽɺFlowΛ໓ Travis CI͔ΒGithub Actions Eslint, rollup, ͦͷଞΖΖશ෦ॻ͖͠
ͱ͍͑ Ϛʔδ͞ΕΔ·Ͱϲ݄͔͔ͬͨ ཧ༝؆୯ɺϝϯςφʔ͕ั·Βͳ͔ͬͨ ઌɺϝϯςφʔͱίϯλΫτΛऔͬͯมΘΓͷϝϯςφʔ͕ग़ ݱͯͬ͠ͱίϝϯτ
ײँ
–ckalika “͜Μʹͪɺ͋ͳͨͷϓϧϦΫΤετʹΛ௨͢ͷʹ͕͔͔࣌ؒͬͯ͠·͍ɺਃ͠༁͋Γ·ͤΜͰͨ͠ɻࠓɺ ѱҙͷ͋Δͷҙຯͷͳ͍ͷؚ͕·Ε͍ͯͳ͍͔֬ೝͨ͠ͱ͜ΖͰ͕͢ɺ͜Ε...ɻຊʹײಈ͠·͠ ͨɻcreateAsyncLocalStorage()ʹkeysྻΛՃͯ͠Ұ؏ੑΛ࣋ͨͤΔͳͲɺࡉ෦ʹ·ͰؾΛͬͨ ྗʹײँ͠·͢ɻ ࠓͷͱ͜Ζςετ͋·Γ͍ͯ͠ͳ͍ͷͰɺ༧֎ͷ݁ՌʹͳΔՄೳੑ͋Γ·͢ɻͦ͠͏ͳͬͨΒɺέʔ εόΠέʔεͰରॲ͠·͕͢ɺࢲؒҧ͍ͳ͋͘ͳͨͷมߋηοτΛਐΊΔ͖ͩͱࢥ͍·͢ɻࡉ͔͍मਖ਼ ʢύοέʔδͷόʔδϣϯɺREADME.mdͷߋ৽ͳͲʣΛՃ͍͑ͨͱࢥ͍·͕͢ɺͦΕΒ͕Ͱ͖ͨΒɺتΜ ͰϚʔδ͠·͢ɻ TypeScriptͷҠߦͱΠϯϑϥͷۙԽɺඇৗʹॏཁͰҙٛਂ͍ࣄۀͰ͢ɻ͜ΕʹΑΓɺΑΓҰ؏ੑͷ͋
ΔɺΑΓଟ͘ͷςετΛߦ͏͜ͱ͕Ͱ͖ΔΑ͏ʹͳΓ·͢ͷͰɺվΊͯײँ͍ͨ͠·͢ɻ”
ۤ࿑ใΘΕΔ TypeScriptԽʹΑͬͯΑΓςετ͘͢͠ͳͬͨ શମతͳݟ௨͠ fl owͰத్ʹܕΛ͚ͭΔΑΓΘ͔Γ͘͢ ͳͬͨ(ओ؍ ͜ΕͰͬͱଞͷਓϝϯςφϯεʹՃΘΕΔΑ͏ʹͳͬͨ ͜͜ॏཁͰ͢Αʂ
·ͱΊ JavascriptͰॻ͔Ε͍ͯΔͷTypeScriptԽͨ͠ํ͕ྑ͍ྫ͋Δ ༐ؾΛͩͯ͠Pull RequestΛग़͢ͷ͕ॏཁ
͝੩ௌ͋͟·Δਫ࢈