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amp-script + Vue.js v-kansai Vue.js/Nuxt.js meetup #5 Masashi Hirano / @shisama

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https://speakerdeck.com/masashi/number-v-kansai-5

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ฏ໺ ণ࢜ / Masashi Hirano ɹɹɹɹ Kyoto office @shisama_ @shisama Node.js Core Collaborator ؔ੢NodeֶԂOrganizer

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Agenda • AMP? • Introduction of amp-script • amp-script + Vue.js

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".1$POGʹ ߦ͖ͬͯ·ͨ͠ʂ

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https://youtu.be/frglA7L7iJY ࠓ೔ͷ࿩ͱؔ܎ͳ͍͚ͲVueͷ࿩΋͋Γ·ͨ͠ʂ

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AMP?

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εϚϗͰGoogleݕࡧͨ͠ͱ͖ ʹදࣔ͞ΕΔ⚡

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Why AMP • ଎౓
 ɾαΠτͷىಈ͕࣌ؒ3ඵҎ্
 ɹ὎53%ͷϢʔβ͕அ೦ͯ͠͠·͏
 ɾىಈ͕࣌ؒ1ඵ஗͘ͳΔ
 ɹ὎ίϯόʔδϣϯ཰͕ 7% ‑Down

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DOMContentLoaded: 633 ms Load: 1.45 s DOMContentLoaded: 1.15 s Load: 3.52 s ௨ৗϞόΠϧϖʔδ AMP Why AMP

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͔͠͠JavaScript͕࢖͑ͳ͍

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Why can’t we use JavaScript in AMP? • AMPϖʔδͰ͸೚ҙͷJavaScript͸࣮ߦͰ͖ͳ͍ • JavaScriptʹΑΔmain threadઐ༗ʹΑΔύϑΥʔϚϯε໰୊ • ༻ҙ͞ΕͨAMPίϯϙʔωϯτΛ࢖ͬͯಈతͳϖʔδΛ࣮૷

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https://youtu.be/1vwOFt9FBm4

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Introduction of amp-script

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https://amp.dev/documentation/components/amp-script

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amp-scriptͱ͸ • AMPͰ΋೚ҙͷJavaScriptΛ࣮ߦՄೳʹ͢ΔAMPίϯϙʔωϯτ • main threadͰ͸ͳ͘worker thread಺ͰJavaScriptΛ࣮ߦ • amp-scriptͷத਎͸worker-domΛϥοϓ͍ͯ͠Δ͚ͩ • JavaScriptͷ1ϑΝΠϧͷαΠζ͕150KiB·Ͱͷ੍ݶ͕͋Δ

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https://github.com/ampproject/worker-dom

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WorkerDOMͱ͸ • WebWorkerͰDOMૢ࡞Λߦ͏ͨΊͷϥΠϒϥϦ • AMP(Accelerated Mobile Pages)ϓϩδΣΫτ͕։ൃ • ·ͩalpha൛ • Worker಺ͷίʔυʹٙࣅDOM͕͋ΓɺͦΕΛmain threadʹૹͬͯ DOMʹ൓ө͍ͯ͠Δ

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https://speakerdeck.com/masashi/off-the-main-thread-with-workerdom WorkerDOMͷͦͷଞʹ͍ͭ ͯ͸ͬͪ͜Λݟ͍ͯͩ͘͞

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https://youtu.be/sYXkVOiz77I

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Restriction and Tradeoff • JavaScriptͷ1ϑΝΠϧͷαΠζ͕150KiB·Ͱ • ϩʔΤϯυͷ୺຤ʹ΋Өڹ͕ͳ͍αΠζ • ϩʔσΟϯάͷύϑΥʔϚϯεΛԼ͛ͳ͍ͨΊ • ෳ਺ϑΝΠϧͷಡΈࠐΈ͸Մೳ • 1ͭ1ͭͷϑΝΠϧαΠζΛখ͘͞෼ׂ͢Ε͹େৎ෉

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amp-script + Vue.js

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https://github.com/ampproject/amphtml/pull/21701

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amp-script + Vue.js example • ampproject/amphtmlຊՈʹαϯϓϧ͕͋Δ • vuejs/vueͷToDoMVC(by Evan You)ΛҠ২ • αʔόʔଆͰϨεϙϯεϔομʔΛ௥Ճ͠ͳ͚Ε͹͍͚ͳ͍ • CORSͰͻ͔͔ͬΔͨΊ • AMP-Access-Control-Allow-Source-OriginͳͲΛ௥Ճ • ࣮ݧతͳػೳͷͨΊAMP.toggleExperiment(‘amp-script')ΛdevTools͔Β࣮ߦ

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amp-script ࣮૷ (͔ͳΓলུ͍ͯ͠Δ)

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IFBE಺ͰBNQTDSJQUͷ+4Λϩʔυ ɾBNQTDSJQUͷTSDʹXPSLFSUISFBEͰಈ͔͢+4ϑΝΠϧΛࢦఆ ɾ+4͔ΒΞΫηε͕ඞཁͳ%0.͸BNQTDSJQUͷλάͰғΉ ɾUFNQMBUF͸)5.-಺ʹॻ͘

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Worker Thread JavaScript͕Worker্Ͱಈ͍ͯΔͷ ͸devTools͔Β֬ೝͰ͖·͢ɻ

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͜͜·Ͱ࿩͖ͯ͠·͕ͨ͠…

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·࣮ͩ༻తͰ͸ͳ͍ • amp-script͸ExperimentalͳͨΊ·ͩ༗ޮͳAMPͱͯ͠͸ೝࣝ ͞Εͳ͍ • Origin Trial͕։࢝͞Ε͍ͯΔ
 (ਃ੥ͨ͠OriginͷΈͰ༗ޮʹͳΔ)
 https://bit.ly/amp-script-trial

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·ͱΊ • amp-scriptΛ࢖͑͹AMPϖʔδͰ΋೚ҙͷJavaScript͕࣮ߦՄೳ • Vue΋࣮ߦͰ͖Δ͸ͣ • ϑΝΠϧαΠζʹ੍ݶ΍Ϩεϙϯεϔομʔʹ͸஫ҙ͢Δ

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ @shisama_ @shisama