Micro Frontends (example from micro-frontends.org)

.JDSP'SPOUFOET .JDSPTFSWJDFT.FFUVQ7PM

ࣗݾ঺հ !2 • ໊લ: ᖒҪ એ඙  ʢ͞Θ͍ ͷͿͻ͜ʣ • twitter/github:
nobuhikosawai • ΤϯδχΞྺ: 2೥ͪΐ͍ • αʔόʔαΠυ(Rails) • ϑϩϯτΤϯυ(React.js)

͍͖ͳΓͷએ఻ !3 IUUQTPUBZCPPUIQNJUFNT ٕज़ॻయ4ͰʮMicroservices architecture ΑΖͣຊʯͱ͍͏ຊΛग़͠·ͨ͠ɻ ୈ5ষͰMicro Frontends΋৮Ε͍ͯ·͢ɻ ΈΜͳങͬͯͶ

.JDSP'SPOUFOETʹཉ͍͠΋ͷ !4 • 6*ίϯϙʔωϯτͷఏڙ • 6*ίϯϙʔωϯτؒͷڠௐ • 6*ίϯϙʔωϯτؒͷΠϕϯτϋϯυϦϯά • 6*ɾϢʔβʔମݧͷ౷Ұ

.JDSP'SPOUFOETͷύλʔϯ !5 • ن໛ͱ΍Γ͍ͨ͜ͱͰ͍͔ͭ͘ͷύλʔϯ͕͋Δ • ϖʔδભҠΛͯ͠΋ྑ͍ύλʔϯ • ϖʔδʹෳ਺ίϯϙʔωϯτΛද͍ࣔͨ͠ύλʔϯ

ϖʔδભҠΛͯ͠΋ྑ͍ύλʔϯ !6 • ैདྷͷϝχϡʔόʔͳͲ͔ΒભҠ͢Δύλʔϯɻ • جຊతʹͭͷαʔϏε͕ͭͷ7JFXΛ࣋ͭɻ • ମݧͷҰ؏ੑΛ୲อ͢ΔͨΊʹҎԼ͕ඞཁ • 4JOHMF4JHO0O
• 6*ͷ౷Ұ • ϔομʔͳͲͷϩδοΫΛؚΉΑ͏ͳίϯϙʔωϯτ – ίϐϖ – ϥΠϒϥϦͰఏڙ͢Δ – ͭͷαʔϏε͕ฦ͢ JGSBNFͰදࣔ͢Δʣ • ϘλϯͳͲͷγϯϓϧͳ6*ύʔπ

ϖʔδʹෳ਺ίϯϙʔωϯτΛද͍ࣔͨ͠ύλʔϯ !7 ෳ਺ίϯϙʔωϯτͷදࣔํ๏͸େ͖͘෼͚ͯͭ • JGSBNFΛ࢖͏ύλʔϯ • 8FC$PNQPOFOUTΛ࢖͏ύλʔϯ

JGSBNFΛ࢖͏ํ๏ !8 • 6*ίϯϙʔωϯτͷఏڙ֤νʔϜ͕)5.-Λఏڙ • 6*ίϯϙʔωϯτؒͷΠϕϯτϋϯυϦϯάJGSBNF ͷQPTU.FTTBHF

JGSBNFΛ࢖͏৔߹ͷίʔυΠϝʔδ !9 • ࢠίϯϙʔωϯτ function receiveMessage(event) { if (event.origin !==
'http://example.com') { return; } ɹif (event.data === 'getHelloWorld') { event.source.postMessage( 'hello world', event.origin ); } } window.addEventListener('message', receiveMessage, false);

JGSBNFΛ࢖͏৔߹ͷίʔυΠϝʔδ !10 • ਌ίϯϙʔωϯτ class Parent extends React.Component { componentDidMount()
{ window.addEventListener('message', this.doSomething, false); } componentWillUnmount() { window.removeEventListener('message', this.doSomething, false); } doSomething() { // do something } }

8FC$PNQPOFOUTΛ࢖͏ํ๏ !11 • ΋͏ͪΐͬͱϞμϯͳํ๏ͱͯ͠8FC$PNQPOFOUTΛ ࢖༻͢Δ

ͪΐͬͱͦΕͯ8FC$PNQPOFOUTͱ͸ͳʹ͔ !12 • ׬શʹཧղͨ͠͹͔Γ ͪΐͬͱυΩϡϝϯτݟͨͩ ͚ʣͳͷͰɺϚαΧϦ͸͓खॊΒ͔ʹ͓ئ͍͠·͢

8FCDPNQPOFOUTͱ͸ͳʹ͔ !13 • 8FCDPNQPOFOUTBSFBTFUPGXFCQMBUGPSN"1*T UIBUBMMPXZPVUPDSFBUFOFXDVTUPN SFVTBCMF FODBQTVMBUFE)5.-UBHTUPVTFJOXFCQBHFTBOE XFCBQQT •
8FCDPNQPOFOUTͱ͸ɺ΢Σϒϖʔδ΍΢ΣϒΞϓϦͷ தͰར༻Մೳͳɺಠࣗͷ࠶ར༻ՄೳͰΧϓηϧԽ͞Εͨ )5.-λάΛ࡞ΔͨΊͷXFCϓϥοτϑΥʔϜͷ"1*Ͱ͢ɻ

8FCDPNQPOFOUTͱ͸ͳʹ͔ !14 • ҎԼͷओͳ࢓༷͔Β੒Δɻ • $VTUPN&MFNFOUT • 4IBEPX%0. • )5.-JNQPSUT
• )5.-5FNQMBUF

γϣοϐϯάαΠτͷྫ !15 • NJDSPGSPOUFOETPSHͷαϯϓϧΛྫʹ • γϣοϐϯάαΠτͷػೳ • ঎඼બ୒ • ߪೖϘλϯ
• Ϩίϝϯυ

γϣοϐϯάαΠτͷྫ !16 • ػೳ͝ͱʹνʔϜ͕ಠཱ • ͋ͳͨ͸ߪೖνʔϜʢ੨νʔϜʣʹଐ͍ͯ͠·͢ • ͜ΕΛ8FC$PNQPOFOUTͰ.JDSP'SPOUFOETͯ͠ΈΔ

$VTUPN&MFNFOUTͷྫ !17 • ·ͣ͸ϘλϯΛදࣔͤ͞Δ • 6*ίϯϙʔωϯτͷఏڙ  8FC$PNQPOFOUTΛར༻ • ͱ͘ʹ$VTUPN&MFNFOUTΛར༻

$VTUPN&MFNFOUTͷྫ !18 • $VTUPN&MFNFOUTͷఆٛͱݺͼग़͠ – λά໊͕িಥ͠ͳ͍Α͏ʹ஫ҙʢQSFGJYͳͲʣ class BlueBuy extends HTMLElement
{ constructor() { super(); this.innerHTML = `<button type="button">buy for 66,00 €</button>`; } disconnectedCallback() { ... } } window.customElements.define('blue-buy', BlueBuy); <blue-buy></blue-buy>

਌͔Βࢠ΁ͷ௨৴%0.ͷमਖ਼ͷํ๏ !19 • ࣍ʹ঎඼ͷը૾Λબ୒ͨ͠ΒɺߪೖϘλϯͷֹۚදࣔΛ ม͑Δํ๏Λߟ͑Δ • $VTUPN&MFNFOUTͷଐੑ஋ͰදࣔΛม͑Δ • PCTFSWFE"UUSJCVUFTʹ؍ଌଐੑΛઃఆ •
BUUSJCVUF$IBOHFE$BMMCBDLͰ࠶SFOEFSΛ࣮ߦ • 3FBDUͰ͍͏ͱ͜ΖͷQSPQTͷมߋ ʢ$PNQPOFOU8JMM3FDFJWF1SPQTΈ͍ͨͳʣ

਌͔Βࢠ΁ͷ௨৴%0.ͷमਖ਼ͷํ๏ !20 • BUUSJCVUFTΛड͚औΕΔ༻ʹઃఆ • 3FBDUQSPQTΈ͍ͨͳ • )5.-EBUBଐੑ <blue-buy sku="t_fendt"></blue-buy>

਌͔Βࢠ΁ͷ௨৴%0.ͷमਖ਼ͷํ๏ !21 const prices = { t_porsche: '66,00 €', t_eicher:
'58,00 €’, … }; class BlueBuy extends HTMLElement { static get observedAttributes() { return ['sku']; } constructor() { super(); this.render(); } render() { const sku = this.getAttribute('sku'); const price = prices[sku]; this.innerHTML = `<button type="button">buy for ${price}</button>`; } attributeChangedCallback(attr, oldValue, newValue) { this.render(); } disconnectedCallback() {...} } window.customElements.define('blue-buy', BlueBuy);

ࢠ͔Β਌PSܑఋཁૉಉ࢜ͷ௨৴%0.&WFOUT !22 • ߪೖϘλϯΛΫϦοΫ͢ΔͱΧʔτͷ਺ࣈ͕มߋ͞Εͯ ཉ͍͠ • &WFOUϞσϧΛ࢖༻ 1VC4VC •
ૄ݁߹ • $VTUPN&WFOUTʹΑΓಠࣗͷ&WFOUఆ͕ٛՄೳ

ࢠ͔Β਌PSܑఋཁૉಉ࢜ͷ௨৴%0.&WFOUT !23 class BlueBuy extends HTMLElement { [...] connectedCallback() {
[...] this.render(); this.firstChild.addEventListener('click', this.addToCart); } addToCart() { // maybe talk to an api this.dispatchEvent(new CustomEvent('blue:basket:changed', { bubbles: true, })); } render() { this.innerHTML = `<button type="button">buy</button>`; } disconnectedCallback() { this.firstChild.removeEventListener('click', this.addToCart); } } • ߪೖϘλϯଆ QVCMJTI

ࢠ͔Β਌΁ͷ௨৴PSܑఋཁૉಉ࢜ͷ௨৴%0.&WFOUT !24 class BlueBasket extends HTMLElement { connectedCallback() { [...]
window.addEventListener('blue:basket:changed', this.refresh); } refresh() { // fetch new data and render it } disconnectedCallback() { window.removeEventListener('blue:basket:changed', this.refresh); } } • ΧʔτଆʢTVCTDSJCF

ͦͷଞͷ࿦఺ !25 • ಈ࡞͢Δ͜ͱʹ੒ޭ͕ͨ͠ଞʹ΋ߟྀ͢΂͖͜ͱ͕ͨ͘ ͞Μɻ • ྫͱͯ͠ҎԼΛߟ࡯͢Δɻ • 6*ͷ౷Ұ •
3PVUJOH

6*ͷ౷Ұ !26 • HMPCBMͳ$44Λఏڙ͢Δ • ϥΠϒϥϦΛఏڙ͢Δ • OQN • CPPUTUSBQͳͲ
• 8FC$PNQPOFOUT • ϘλϯͷΑ͏ͳ6*ύʔπͳͲ

6*ͷ౷Ұ !27 • HMPCBMͳ$44 • ϝϦοτಋೖ͕؆୯ɺҰ؏ੑͷ୲อ͕༰қ • σϝϦοτංେԽ͠΍͍͢ɺϦϑΝΫλϦϯά͕ࠔ೉ • MJCSBSZ
• ϝϦοτಠཱͯ͠मਖ਼Մೳ • σϝϦοτCVJMEπʔϧʹґଘ͢Δ৔߹͕͋Δɺόʔδϣ ϯࠩ෼ʹΑΔ6*ͷෆҰக

3PVUJOH !28 • ભҠ͍Ζ͍Ζ • νʔϜ಺෦ͷϧʔςΟϯάͷભҠWTνʔϜؒΛ·͙ͨભҠ • ϑϧϨϯμϦϯάWTύʔγϟϧϨϯμϦϯά IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOETUIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

3PVUJOH !29 • νʔϜ಺෦͚ͩεϜʔζʹҠಈͰ͖Δྫ • ࣮૷͸ൺֱత୯७ • νʔϜΛ·͙ͨͱ͖ʹ69͕௿Լ͢Δ IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOETUIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

3PVUJOH !30 • νʔϜؒΛ·͙ͨભҠΛύʔγϟϧϨϯμϦϯάͰ΍Δ ྫ • ϧʔςΟϯάͱͦΕʹରԠ͢ΔGSBHNFOUͷϚοϐϯάΛ ࣮࣋ͬͯݱ͢Δ IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOETUIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

ύωϧσΟεΧογϣϯ΁ͷ໰୊ఏى !31 • .JDSP'SPOUFOETΛΊ͙Δ໰୊ • νʔϜ෼ׂ • 8FC$PNQPOFOUTͷຊ൪౤ೖ • 6*ϥΠϒϥϦͷఏڙ
• ೝূͲ͏͢Δ͔ • 'SBNFXPSLDPNQBUJCJMJUZ • ύϑΥʔϚϯε • ΞʔΩςΫνϟ • ͳͲ • ϑϩϯτΤϯυͷະདྷͱະདྷʹ޲͚ͯԿ͕Ͱ͖Δͷ͔Λ ٞ࿦͍ͨ͠ͱࢥ͍·͢ɻ

ࢀߟࢿྉ !32 • IUUQTNJDSPGSPOUFOETPSH • IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOET UIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠

Micro Frontends (example from micro-frontends.org)

Micro Frontends (example from micro-frontends.org)

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.JDSP'SPOUFOET .JDSPTFSWJDFT.FFUVQ7PM

ࣗݾ঺հ !2 • ໊લ: ᖒҪ એ඙  ʢ͞Θ͍ ͷͿͻ͜ʣ • twitter/github:

͍͖ͳΓͷએ఻ !3 IUUQTPUBZCPPUIQNJUFNT ٕज़ॻయ4ͰʮMicroservices architecture ΑΖͣຊʯͱ͍͏ຊΛग़͠·ͨ͠ɻ ୈ5ষͰMicro Frontends΋৮Ε͍ͯ·͢ɻ ΈΜͳങͬͯͶ

.JDSP'SPOUFOETʹཉ͍͠΋ͷ !4 • 6ίϯϙʔωϯτͷఏڙ • 6ίϯϙʔωϯτؒͷڠௐ • 6ίϯϙʔωϯτؒͷΠϕϯτϋϯυϦϯά • 6ɾϢʔβʔମݧͷ౷Ұ

.JDSP'SPOUFOETͷύλʔϯ !5 • ن໛ͱ΍Γ͍ͨ͜ͱͰ͍͔ͭ͘ͷύλʔϯ͕͋Δ • ϖʔδભҠΛͯ͠΋ྑ͍ύλʔϯ • ϖʔδʹෳ਺ίϯϙʔωϯτΛද͍ࣔͨ͠ύλʔϯ

ϖʔδભҠΛͯ͠΋ྑ͍ύλʔϯ !6 • ैདྷͷϝχϡʔόʔͳͲ͔ΒભҠ͢Δύλʔϯɻ • جຊతʹͭͷαʔϏε͕ͭͷ7JFXΛ࣋ͭɻ • ମݧͷҰ؏ੑΛ୲อ͢ΔͨΊʹҎԼ͕ඞཁ • 4JOHMF4JHO0O

ϖʔδʹෳ਺ίϯϙʔωϯτΛද͍ࣔͨ͠ύλʔϯ !7 ෳ਺ίϯϙʔωϯτͷදࣔํ๏͸େ͖͘෼͚ͯͭ • JGSBNFΛ࢖͏ύλʔϯ • 8FC$PNQPOFOUTΛ࢖͏ύλʔϯ

JGSBNFΛ࢖͏ํ๏ !8 • 6ίϯϙʔωϯτͷఏڙ֤νʔϜ͕)5.-Λఏڙ • 6ίϯϙʔωϯτؒͷΠϕϯτϋϯυϦϯάJGSBNF ͷQPTU.FTTBHF

JGSBNFΛ࢖͏৔߹ͷίʔυΠϝʔδ !9 • ࢠίϯϙʔωϯτ function receiveMessage(event) { if (event.origin !==

JGSBNFΛ࢖͏৔߹ͷίʔυΠϝʔδ !10 • ਌ίϯϙʔωϯτ class Parent extends React.Component { componentDidMount()

8FC$PNQPOFOUTΛ࢖͏ํ๏ !11 • ΋͏ͪΐͬͱϞμϯͳํ๏ͱͯ͠8FC$PNQPOFOUTΛ ࢖༻͢Δ

ͪΐͬͱͦΕͯ8FC$PNQPOFOUTͱ͸ͳʹ͔ !12 • ׬શʹཧղͨ͠͹͔Γ ͪΐͬͱυΩϡϝϯτݟͨͩ ͚ʣͳͷͰɺϚαΧϦ͸͓खॊΒ͔ʹ͓ئ͍͠·͢

8FCDPNQPOFOUTͱ͸ͳʹ͔ !13 • 8FCDPNQPOFOUTBSFBTFUPGXFCQMBUGPSN"1*T UIBUBMMPXZPVUPDSFBUFOFXDVTUPN SFVTBCMF FODBQTVMBUFE)5.-UBHTUPVTFJOXFCQBHFTBOE XFCBQQT •

8FCDPNQPOFOUTͱ͸ͳʹ͔ !14 • ҎԼͷओͳ࢓༷͔Β੒Δɻ • $VTUPN&MFNFOUT • 4IBEPX%0. • )5.-JNQPSUT

γϣοϐϯάαΠτͷྫ !15 • NJDSPGSPOUFOETPSHͷαϯϓϧΛྫʹ • γϣοϐϯάαΠτͷػೳ • ঎඼બ୒ • ߪೖϘλϯ

γϣοϐϯάαΠτͷྫ !16 • ػೳ͝ͱʹνʔϜ͕ಠཱ • ͋ͳͨ͸ߪೖνʔϜʢ੨νʔϜʣʹଐ͍ͯ͠·͢ • ͜ΕΛ8FC$PNQPOFOUTͰ.JDSP'SPOUFOETͯ͠ΈΔ

$VTUPN&MFNFOUTͷྫ !17 • ·ͣ͸ϘλϯΛදࣔͤ͞Δ • 6*ίϯϙʔωϯτͷఏڙ  8FC$PNQPOFOUTΛར༻ • ͱ͘ʹ$VTUPN&MFNFOUTΛར༻

$VTUPN&MFNFOUTͷྫ !18 • $VTUPN&MFNFOUTͷఆٛͱݺͼग़͠ – λά໊͕িಥ͠ͳ͍Α͏ʹ஫ҙʢQSFGJYͳͲʣ class BlueBuy extends HTMLElement

਌͔Βࢠ΁ͷ௨৴%0.ͷमਖ਼ͷํ๏ !19 • ࣍ʹ঎඼ͷը૾Λબ୒ͨ͠ΒɺߪೖϘλϯͷֹۚදࣔΛ ม͑Δํ๏Λߟ͑Δ • $VTUPN&MFNFOUTͷଐੑ஋ͰදࣔΛม͑Δ • PCTFSWFE"UUSJCVUFTʹ؍ଌଐੑΛઃఆ •

਌͔Βࢠ΁ͷ௨৴%0.ͷमਖ਼ͷํ๏ !20 • BUUSJCVUFTΛड͚औΕΔ༻ʹઃఆ • 3FBDUQSPQTΈ͍ͨͳ • )5.-EBUBଐੑ <blue-buy sku="t_fendt"></blue-buy>

਌͔Βࢠ΁ͷ௨৴%0.ͷमਖ਼ͷํ๏ !21 const prices = { t_porsche: '66,00 €', t_eicher:

ࢠ͔Β਌PSܑఋཁૉಉ࢜ͷ௨৴%0.&WFOUT !22 • ߪೖϘλϯΛΫϦοΫ͢ΔͱΧʔτͷ਺ࣈ͕มߋ͞Εͯ ཉ͍͠ • &WFOUϞσϧΛ࢖༻ 1VC4VC •

ࢠ͔Β਌PSܑఋཁૉಉ࢜ͷ௨৴%0.&WFOUT !23 class BlueBuy extends HTMLElement { [...] connectedCallback() {

ࢠ͔Β਌΁ͷ௨৴PSܑఋཁૉಉ࢜ͷ௨৴%0.&WFOUT !24 class BlueBasket extends HTMLElement { connectedCallback() { [...]

ͦͷଞͷ࿦఺ !25 • ಈ࡞͢Δ͜ͱʹ੒ޭ͕ͨ͠ଞʹ΋ߟྀ͢΂͖͜ͱ͕ͨ͘ ͞Μɻ • ྫͱͯ͠ҎԼΛߟ࡯͢Δɻ • 6*ͷ౷Ұ •

6*ͷ౷Ұ !26 • HMPCBMͳ$44Λఏڙ͢Δ • ϥΠϒϥϦΛఏڙ͢Δ • OQN • CPPUTUSBQͳͲ

6*ͷ౷Ұ !27 • HMPCBMͳ$44 • ϝϦοτಋೖ͕؆୯ɺҰ؏ੑͷ୲อ͕༰қ • σϝϦοτංେԽ͠΍͍͢ɺϦϑΝΫλϦϯά͕ࠔ೉ • MJCSBSZ

3PVUJOH !28 • ભҠ͍Ζ͍Ζ • νʔϜ಺෦ͷϧʔςΟϯάͷભҠWTνʔϜؒΛ·͙ͨભҠ • ϑϧϨϯμϦϯάWTύʔγϟϧϨϯμϦϯά IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOETUIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

3PVUJOH !29 • νʔϜ಺෦͚ͩεϜʔζʹҠಈͰ͖Δྫ • ࣮૷͸ൺֱత୯७ • νʔϜΛ·͙ͨͱ͖ʹ69͕௿Լ͢Δ IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOETUIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

3PVUJOH !30 • νʔϜؒΛ·͙ͨભҠΛύʔγϟϧϨϯμϦϯάͰ΍Δ ྫ • ϧʔςΟϯάͱͦΕʹରԠ͢ΔGSBHNFOUͷϚοϐϯάΛ ࣮࣋ͬͯݱ͢Δ IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOETUIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

ύωϧσΟεΧογϣϯ΁ͷ໰୊ఏى !31 • .JDSP'SPOUFOETΛΊ͙Δ໰୊ • νʔϜ෼ׂ • 8FC$PNQPOFOUTͷຊ൪౤ೖ • 6*ϥΠϒϥϦͷఏڙ

ࢀߟࢿྉ !32 • IUUQTNJDSPGSPOUFOETPSH • IUUQTTQFBLFSEFDLDPNOBMUBUJTNJDSPGSPOUFOET UIJOLTNBMMFSBWPJEUIFNPOPMJUIMPWFUIFCBDLFOE

͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠