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Node.js v22 で変わること
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Yosuke Furukawa
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April 24, 2024
Programming
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Node.js v22 で変わること
2024/04/24 令和トラベルで発表した Node.js v22 で変わることの話です。
Yosuke Furukawa
PRO
April 24, 2024
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Transcript
Node.js v22 ͰมΘΔ͜ͱ 2024/4/24 @ ྩτϥϕϧ
X: @yosuke_furukawa Github: yosuke-furukawa
Node.js v21 => v22 ͰมΘͬͨ͜ͱΛ· ͱΊ·͢
໔ • v21 Ͱ͢ͰʹೖͬͯΔͷؚΈ·͢ • 21 ͱ 22 Major
Version up Ͱ͋ΓɺػೳͷՃ Minor Version up Ͱ͢ͰʹߦΘΕͯΔͷଟ͍ͨΊ
1ݸ!!!
Ϛείοτര
Ϛείοτ
Ϛείοτ • ࣮ੲ͔ΒϚείοτΩϟϥΫλʔͱͯ͠ΧϝͱϩέοτͷΞ ΠσΞ͋ͬͨɻ
αΫαΫߦ͘Αʂ2ݸ!!!
require(ESM)
require(ESM) • ͜Ε·Ͱͷঢ়گ • Node.js ٴͼ JS ʹ̎ͭͷmodule load ํ͕ࣜ͋Δ
• ESM ͱ CJS • ैདྷ͋ͬͨͷ͕ CJS, 2015Ҏ߱ʹͰ͖ͨͷ͕ESM • ESM ͔Β CJS ಡΊ͕ͨɺٯͷCJS͔ΒESMΛಡΉ͜ͱ͕Ͱ͖ͳ͔ͬͨ
require(ESM) • ྫ͑ΔͳΒɺ USB-C ͱ USB-A Έ͍ͨͳɾɾɾʁ • USB-CରԠσόΠε USB-CɺUSB-A྆ํରԠͰ͖ΔʢΞμϓλചͬͯΔ͠ɺن֨
తʹೝΊΒΕͯΔʣ • USB-AରԠσόΠεUSB-C͔Βܨ͛ͳ͍ɻʢΞμϓλചͬͯΔ͚Ͳɺن֨֎ͰೝΊ ΒΕͯͳ͍ʣ • CରԠ AରԠ AରԠ CରԠ
require(ESM) • ͖݅Ͱ CJS => ESM ೝΊΔ͜ͱʹͳͬͨ • ͖ͬ͞ͷྫͰݴ͑ɺ USB-A
σόΠε͔Β USB-C ͷม͕ ن্֨ೝΊΒΕΔΑ͏ʹͳͬͨɻ • ݅͋ΔɺதͰ top-level-await Λ͍ͯ͠Δͱμϝ • USB-A=>USB-CUSB-Cͷಠࣗػೳ͑ͳ͍ͷͱಉ͡
require(ESM) • --experimental-require-moduleϑϥά͕ࠓඞཁ • ͭ·Γ·࣮ͩݧஈ֊ • ࠓޙϑϥάແ͠Ͱ͑ΔΑ͏ʹ͍ͯ͘͠༧ఆ
3ݸʂʂʂ
v8 Maglev
v8 Maglev • v8 ͱ͍͏ JavaScript ࣮ߦΤϯδϯ͕มΘͬͨɻ • Just In
Time Compiler ʹ֊͕͋Δɻ • ࠓ·Ͱ Ignition, Sparkplug, TurboFan ͷ3ͩͬͨͷ͕ɺ4ʹ ͳͬͨɻ Ignition, Sparkplug, Maglev, TurboFan
v8 Maglev • ઈͬ͘͟Γݴ͏ͱ: • 3ஈมΪΞ͔Β4ஈมΪΞʹมΘͬͨ • ΪΞ͕૿͑Δ㲈͍ΖΜͳہ໘ʹରԠͰ͖Δ • ݁Ռɺੑೳ໘Ͱશମతʹߴʹɻ
v8 Maglev • Node.js ͷதͰݴ͏ͱɺServer Side ͷվળͱ͍͏ΑΓCLIΈ ͍ͨͳγϣʔτλΠϜͰ͏Α͏ͳΞϓϦέʔγϣϯͰվળ͞ ΕͯΔɻ •
tsc ࣮ߦ, linter, formatter etc
4ݸʂʂʂ
node --run
node --run • npm run hogehoge Ͱ࣮ߦ͍ͯͨ͠ script ࣮ߦʹ৽͍͠ํ๏͕ ೖͬͨɻ
• node --run hogehoge Ͱ࣮ߦՄೳ • ͜ΕʹΑΓɺ npm ্ཱͪ͛·Ͱͷىಈ࣌ؒΛݮΒͯ͠ύ ϑΥʔϚϯεվળͰ͖ΔΑ͏ʹͳ͍ͬͯΔɻ
node --run • npm run test ΑΓ node --run test
ͷํ͕͍ͬͯ͜ͱ • దͳڥͰ࣮ߦͨ݁͠Ռͩͱ100msલޙ͍ɻ
5ݸʂʂʂ
fs.glob, fs.globSync
fs.glob,fs.globSync import { glob } from 'node:fs/promises'; for await (const
entry of glob('**/*.mjs')) { console.log(entry); } // foo.mjs // bar/baz.mjs // hoge/fuga/piyo.mjs
͜Μͳײ͡Ͱ
Node.js v22 • ৭ʑϦϦʔε͞ΕͯΔ͚Ͳɺجຊͦ͜·Ͱ৽͍͠ͷͰͳ ͍ɻ • خ͍͠ͷଟ͍ɻΑΓྑ͘͢ΔͨΊͷεςοϓόΠεςοϓͷ ਐԽ͕خ͍͠ɻ • ֵ৽తͳਐԽͰͳ͘ɺਐతͳਐԽ