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Flutter2 Ͱweb appΛ࡞Δ Jun 24 2021 asuka y

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Agenda 1. Flutterͱ͸ 2. Web։ൃ 3. ·ͱΊ

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Flutterͱ͸

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Flutter Flutter͸ɺGoogleʹΑͬͯ։ൃ ͞ΕͨϑϦʔ͔ͭΦʔϓϯιʔε ͷUIͷSDKͰ͋Δɻ୯Ұͷίʔυ ϕʔε͔ΒɺAndroidɺiOSɺ LinuxɺmacOSɺWindowsɺ Google Fuchsia޲͚ͷΫϩεϓ ϥοτϑΥʔϜΞϓϦέʔγϣϯ Λ։ൃ͢ΔͨΊʹར༻͞ΕΔɻ by Wikipedia

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Flutterͱ͸ by Wikipedia Flutter͸ɺGoogleʹΑͬͯ։ൃ ͞ΕͨϑϦʔ͔ͭΦʔϓϯιʔε ͷUIͷSDKͰ͋Δɻ୯Ұͷίʔυ ϕʔε͔ΒɺAndroidɺiOSɺ LinuxɺmacOSɺWindowsɺ Google Fuchsia޲͚ͷΫϩεϓ ϥοτϑΥʔϜΞϓϦέʔγϣϯ Λ։ൃ͢ΔͨΊʹར༻͞ΕΔɻ

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Flutterͱ͸ by Wikipedia Flutter͸ɺGoogleʹΑͬͯ։ൃ ͞ΕͨϑϦʔ͔ͭΦʔϓϯιʔε ͷUIͷSDKͰ͋Δɻ୯Ұͷίʔυ ϕʔε͔ΒɺAndroidɺiOSɺ LinuxɺmacOSɺWindowsɺ Google Fuchsia޲͚ͷΫϩεϓ ϥοτϑΥʔϜΞϓϦέʔγϣϯ Λ։ൃ͢ΔͨΊʹར༻͞ΕΔɻ Z Z Z Z Z

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Flutter Flutter͸ɺGoogleʹΑͬͯ։ൃ ͞ΕͨϑϦʔ͔ͭΦʔϓϯιʔε ͷUIͷSDKͰ͋Δɻ୯Ұͷίʔυ ϕʔε͔ΒɺAndroidɺiOSɺ LinuxɺmacOSɺWindowsɺ Google Fuchsia޲͚ͷΫϩεϓ ϥοτϑΥʔϜΞϓϦέʔγϣϯ Λ։ൃ͢ΔͨΊʹར༻͞ΕΔɻ by Wikipedia ϋʔυ΢ΣΞ OS Flutter Τϯδϯ Flutter App (Dart)

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Dart Dartݴޠ͸JavaScriptݴޠʹ͋ ΔղܾͰ͖ͳ͍ݴޠ্ͷ໰୊ ఺Λղܾ͠ͳ͓͔ͭɺΑΓ༏ ΕͨύϑΥʔϚϯεΛൃش ͠ɺେن໛ͳϓϩδΣΫτ༻ ్ʹ΋଱͑ಘΔಛ௃Λඋ͑ɺ ηΩϡϦςΟ໘Ͱ΋ΑΓ༏Ε ͨݴޠͱͯ͠ɺઃܭ͞Εͨɻ by Wikipedia 2011೥10݄ Dartൃද(Google) 2015೥ Chrome΁ͷ౷߹Λஅ ೦(Google) 2017೥ TypeScriptΛࣾ಺ඪ४ ݴޠʹ(Google) 2018೥2݄ Dart2ϦϦʔε

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Dart ίϯύΠϧݴޠͰ΋͋ΓɼεΫϦϓτݴޠͰ΋͋Δ 1. JITίϯύΠϧ(PHPͳͲ) 2. AOTίϯύΠϧ (JavaͳͲ) 3. ωΠςΟϒίϯύΠϧ (CͳͲ)

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Dart Dartݴޠ͸JavaScriptݴޠʹ͋ ΔղܾͰ͖ͳ͍ݴޠ্ͷ໰୊ ఺Λղܾ͠ͳ͓͔ͭɺΑΓ༏ ΕͨύϑΥʔϚϯεΛൃش ͠ɺେن໛ͳϓϩδΣΫτ༻ ్ʹ΋଱͑ಘΔಛ௃Λඋ͑ɺ ηΩϡϦςΟ໘Ͱ΋ΑΓ༏Ε ͨݴޠͱͯ͠ɺઃܭ͞Εͨɻ by Wikipedia 2011೥10݄ Dartൃද(Google) 2015೥ Chrome΁ͷ౷߹Λஅ ೦(Google) 2017೥ TypeScriptΛࣾ಺ඪ४ ݴޠʹ(Google) 2018೥2݄ Dart2ϦϦʔε

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Flutter 1.0 
 2018೥12݄4೔ 2.0 
 2021೥3݄3೔ by Wikipedia 2011೥10݄ Dartൃද(Google) 2015೥ Chrome΁ͷ౷߹Λஅ ೦(Google) 2017೥ TypeScriptΛࣾ಺ඪ४ ݴޠʹ(Google) 2018೥2݄ Dart2ϦϦʔε 2018೥12݄ FlutterϦϦʔε 2021೥3݄ Dart2.12ϦϦʔε 2021೥3݄ Flutter2ϦϦʔε

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Dart2.11 → 2.12 2.12͸࣮࣭Dart3 Sound Null Safetyͷ࣮૷ʹΑΓɼ७ਮͳޙํޓ׵͕ ࣦΘΕͨ // Dart2.11 void main() { String foo; } // Dart2.12 void main() { String foo; // ίϯύΠϧΤϥʔ } // Dart2.12 void main() { String? foo; }

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Dart2.11 → 2.12 2.12͸࣮࣭Dart3 Sound Null Safetyͷ࣮૷ʹΑΓɼ७ਮͳޙํޓ׵͕ ࣦΘΕͨ // Dart2.11 void main() { String foo; } // Dart2.12 void main() { String foo; // ίϯύΠϧΤϥʔ } // Dart2.12 void main() { String? foo; }

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Flutter 1.0 
 2018೥12݄4೔ 2.0 
 2021೥3݄3೔ by Wikipedia 2011೥10݄ Dartൃද(Google) 2015೥ Chrome΁ͷ౷߹Λஅ ೦(Google) 2017೥ TypeScriptΛࣾ಺ඪ४ ݴޠʹ(Google) 2018೥2݄ Dart2ϦϦʔε 2018೥12݄ FlutterϦϦʔε 2021೥3݄ Dart2.12ϦϦʔε 2021೥3݄ Flutter2ϦϦʔε

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Flutter2ͰมΘͬͨ͜ͱ • Linux, Windows, macOS, webͷαϙʔτ͕҆ఆ൛ʹ૊Έ ࠐ·Εͨ

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Flutter2ͰมΘͬͨ͜ͱ • Linux, Windows, macOS, webͷαϙʔτ͕҆ఆ൛ʹ૊Έ ࠐ·Εͨ

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Flutter2ͰมΘͬͨ͜ͱ • Linux, Windows, macOS, webͷαϙʔτ͕҆ఆ൛ʹ૊Έ ࠐ·Εͨ $ f lutter run -d chrome --web-renderer canvaskit

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Web։ൃ

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Web։ൃ • JS͕DOMπϦʔΛߋ৽ • DOMπϦʔͷ಺༰Λϒ ϥ΢β͕දࣔ ϒϥ΢β DOMπϦʔ …

Hello, World

… … JS

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Flutter • DOMπϦʔΛߋ৽͠ͳ ͍ • ಠࣗͷϨϯμϦϯάΤ ϯδϯͰඳը for WEB ϒϥ΢β ϨϯμϦϯάΤϯδϯ(canvaskit) JS

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ϝϦοτ • ϒϥ΢β؀ڥʹࠨӈ͞Εͳ͍ը໘Λ࡞੒Ͱ͖Δ • ը໘ͷදࣔ੾Γସ͕͑଎͍

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σϝϦοτ • Webϖʔδͱͯ͠͸༰ྔ͕େ͖͘ͳΓ͕ͪ • จষ৘ใͱͯ͠Ͱ͸ͳ͘ɼը૾৘ใͱͯ͠දࣔ͞ΕΔͷ Ͱɼϒϥ΢βͷݕࡧػೳ͕࢖͑ͳ͍

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Flutterͷ࢖͍ॴ WebϖʔδΛ࡞ΔͷͰ͸ͳ͘ɼߴػೳͳWebΞϓϦΛ࡞੒ ͍ͨ͠৔߹ͷબ୒ࢶʹͳΓಘΔ

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LicenseRegistry class LicenseRegistry.addLicense(() async* { f inal license = await rootBundle.loadString('fonts/OFL.txt'); yield LicenseEntryWithLineBreaks( ['Noto Sans JP'], license, ); }); showAboutDialog( context: context, applicationName: name, applicationVersion: version, applicationLegalese: description, );

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for Web࢖ͬͯΈͯ • Hot reload͕ޮ͔ͣɼશͯHot restartʹͳΔ • جຊUI͸ॆ࣮͍ͯ͠Δ͕ɼը૾ܥͷϥΠϒϥϦͳͲ͸WebʹରԠ͠ ͍ͯͳ͍΋ͷ͕ଟ͍(ແ͚Ε͹࡞Ζ͏) • Chromeͷσόοά؀ڥ͸গʑॏͨ͘ײ͡Δ(ؾͷ͍͔ͤ΋) • Canvaskit؀ڥͰ͸೔ຊޠͳͲ͸·ͣTofuʹͳΔ(ճආࡦ͸͋Δ͕ֆ จࣈ͕·ͩ՝୊)

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·ͱΊ

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·ͱΊ • WebϖʔδΛ࡞Γ͍ͨ৔߹ͷબ୒ࢶͱͯ͠͸ऑ͍͔΋? • (WebϖʔδͰ͸ͳ͘)WebΞϓϦΛ࡞Γ͍ͨ৔߹ͷબ୒ࢶ ʹ͸ͳΓಘΔ? • ΞϓϦͷΫϩεϓϥοτϑΥʔϜରԠ(͍ͭͰʹWeb΋ର Ԡ͍ͨ͠)৔߹ͷબ୒ࢶʹ͸ͳΓಘΔ