そのJavascript、全部TypeScriptにしちゃえ

Open Source Conference 2021 Online/Fall LT

1. ͦͷJavascriptɺ શ෦TypeScriptʹͪ͠Ό͑ Taro Matsuzawa(@smellman)
2. ࣗݾ঺հ ஍ཧۭؒܥΤϯδχΞ ೔ຊUNIXϢʔβձձ௕/Ұൠࣾஂ๏ਓOSGeo೔ຊࢧ෦ཧࣄ/Ұൠࣾஂ๏ਓΦʔ ϓϯετϦʔτϚοϓϑΝ΢ϯσʔγϣϯδϟύϯϝϯόʔ ౦ژిػେֶOB/౦ژిػେֶCySecݱ໾ੜ breakcoreΫϥελ ૊௕ͱݺ͹Εͯ·͢
3. ૊௕ʢ୤ୀࡁΈʣ
4. OSSͷ׆ಈ React NativeܥϥΠϒϥϦͷվम react-native-static-server (iOSରԠ), redux-persist (ϥΠϒϥϦΛ·Δ͝ͱ TypeScriptʹॻ͖׵͑Δ) ͳͲ OpenMapTilesϓϩδΣΫτ΁ͷߩݙɺ஍ཧؔ܎։ൃ΍຋༁ ckanext-spatial (Python3ରԠ) ͳͲ ͦͷଞɺؾ͕޲͘··ίʔυ΍υΩϡϝϯτΛॻ͍ͯ·͢
5. redux-persist ReactͰΑ͘࢖ΘΕΔঢ়ଶͷอ࣋Λ͢Δreduxʹؔ܎͢ΔϥΠϒϥϦ redux-persistΛ࢖͏ͱঢ়ଶΛLocalStorage(Web)/AsyncStorage(React Native)ͳͲʹอ࣋ͯ͘͠ΕΔ εϚϗΞϓϦͰঢ়ଶΛอଘ͢ΔͷʹศརͳϥΠϒϥϦ
6. ಋೖΛݕ౼ͨ݁͠Ռ ϝϯςφϯε͕2೥͙Β͍์ஔ ϝϯςφʔ͕ډͳ͍ͱ͍͏issue͕์ஔ͞Ε͍ͯΔ Pull Request΋Կ΋͔΋์ஔ ͳΜͱ͔͍ͨ͠
7. ιʔείʔυΛಡΜͰΈΔ ΢οɺFlow࢖ͬͯΔ…
8. Flow FLOW IS A STATIC TYPE CHECKER FOR JAVASCRIPT Facebook͕࡞ͬͨJavascriptͷ੩తܕνΣοΧʔ Javascriptʹແཧ໼ཧܕͷ֓೦ΛೖΕΔ ΊͬͪΌಡΈͮΒ͍ʼʻ
9. ܕೖΕΔͳΒ ΋͏TypeScriptͰ͍͍͡ΌΜʂ
10. ͍͍͡ΌΜ Flow͕·͡ϝϯςφϯεͷ࢓ํ͕Θ͔ΒΜ VSCode͕Flowͷόʔδϣϯ͕ҧ͏ͱΤϥʔΛు͖·͘Δ ͦ͜·ͰͪΌΜͱܕ෇͚͕͞Ε͍ͯΔΘ͚Ͱ΋ͳ͍ ໌ࣔతʹanyͬͯॻ͖͍ͨ͡ΌΜ͔͢
11. ͱ͍͏Θ͚Ͱ
12. ΍ͬͨ͜ͱ શ෦TypeScriptԽɺFlowΛ๾໓ Travis CI͔ΒGithub Actions΁ Eslint, rollup, ͦͷଞ΋Ζ΋Ζશ෦ॻ͖௚͠
13. ͱ͸͍͑ Ϛʔδ͞ΕΔ·Ͱ਺ϲ݄͔͔ͬͨ ཧ༝͸؆୯ɺϝϯςφʔ͕ั·Βͳ͔ͬͨ ઌ೔ɺϝϯςφʔͱίϯλΫτΛऔͬͯมΘΓͷϝϯςφʔ͕ग़ ݱͯ͠΍ͬͱίϝϯτ
14. ײँ
15. –ckalika “͜Μʹͪ͸ɺ͋ͳͨͷϓϧϦΫΤετʹ໨Λ௨͢ͷʹ͕͔͔࣌ؒͬͯ͠·͍ɺਃ͠༁͋Γ·ͤΜͰͨ͠ɻࠓɺ ѱҙͷ͋Δ΋ͷ΍ҙຯͷͳ͍΋ͷؚ͕·Ε͍ͯͳ͍͔֬ೝͨ͠ͱ͜ΖͰ͕͢ɺ͜Ε͸...ɻຊ౰ʹײಈ͠·͠ ͨɻcreateAsyncLocalStorage()ʹkeys഑ྻΛ௥Ճͯ͠Ұ؏ੑΛ࣋ͨͤΔͳͲɺࡉ෦ʹ·ͰؾΛ഑ͬͨ ౒ྗʹײँ͠·͢ɻ ࠓͷͱ͜Ζςετ͸͋·Γ͍ͯ͠ͳ͍ͷͰɺ༧૝֎ͷ݁ՌʹͳΔՄೳੑ΋͋Γ·͢ɻ΋ͦ͠͏ͳͬͨΒɺέʔ εόΠέʔεͰରॲ͠·͕͢ɺࢲ͸ؒҧ͍ͳ͋͘ͳͨͷมߋηοτΛਐΊΔ΂͖ͩͱࢥ͍·͢ɻࡉ͔͍मਖ਼ ʢύοέʔδͷόʔδϣϯɺREADME.mdͷߋ৽ͳͲʣΛՃ͍͑ͨͱࢥ͍·͕͢ɺͦΕΒ͕Ͱ͖ͨΒɺتΜ ͰϚʔδ͠·͢ɻ TypeScript΁ͷҠߦͱΠϯϑϥͷۙ୅Խ͸ɺඇৗʹॏཁͰҙٛਂ͍ࣄۀͰ͢ɻ͜ΕʹΑΓɺΑΓҰ؏ੑͷ͋ ΔɺΑΓଟ͘ͷςετΛߦ͏͜ͱ͕Ͱ͖ΔΑ͏ʹͳΓ·͢ͷͰɺվΊͯײँ͍ͨ͠·͢ɻ”
16. ۤ࿑͸ใΘΕΔ TypeScriptԽʹΑͬͯΑΓςετ͠΍͘͢ͳͬͨ શମతͳݟ௨͠΋ fl owͰத్൒୺ʹܕΛ͚ͭΔΑΓ΋Θ͔Γ΍͘͢ ͳͬͨ(ओ؍ ͜ΕͰ΍ͬͱଞͷਓ΋ϝϯςφϯεʹՃΘΕΔΑ͏ʹͳͬͨ ͜͜ॏཁͰ͢Αʂ
17. ·ͱΊ JavascriptͰॻ͔Ε͍ͯΔ΋ͷ͸TypeScriptԽͨ͠ํ͕ྑ͍ྫ΋͋Δ ༐ؾΛͩͯ͠Pull RequestΛग़͢ͷ͕ॏཁ
18. ͝੩ௌ͋͟·Δਫ࢈