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Stimulus × Jest × Direct Upload × Image Fluxで カオスなJS環境と画像アップロード機能を改善しつつユーザーの投稿率を上げた話
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Masayoshi Tokumoto
June 29, 2019
Technology
1
340
Stimulus × Jest × Direct Upload × Image Fluxで カオスなJS環境と画像アップロード機能を改善しつつユーザーの投稿率を上げた話
沖縄で開催されたハッカーズチャンプルー2019でLTをした時の資料です
Masayoshi Tokumoto
June 29, 2019
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Transcript
Stimulus × Jest × Direct Upload × Image FluxͰ ΧΦεͳJSڥͱը૾ΞοϓϩʔυػೳΛ
վળͭͭ͠ϢʔβʔͷߘΛ্͛ͨ ·͞ʢ@Masah201707ʣ
ࣗݾհ • ·͞ʢ@Masah201707ʣ • גࣜձࣾΈΜͳͷΣσΟϯάʢ18ଔʣ • ͪΐͬͱॻ͚Δ • Ruby/Rails/JavaScript/Stimulus •
͜Ε͔Βͪΐͬͱॻ͚Δ • React/Go • ͓ञͱ͓ण࢘ͱֶͼʹͳΔٕज़ͷ͕͋Ε͍͍ͩͨͤ
ΈΜͳͷΣσΟϯάͱ • ʮ݁ࠗࣜͷຊΛ͑ΔʯͨΊͷαʔϏε • ϝΠϯίϯςϯπʹ݁ࠗࣜʹؔ͢Δޱίϛɾ࣮ࡍͷඅ༻໌ࡉͳͲ͕͋Δ
ͬͨ͜ͱ Ϣʔβʔߘը૾ͷ ΞοϓϩʔυͷΈΛม͑Δ
Γ͍ͨ͜ͱ • jQueryΛ٫͍ͨ͠ʢͻͲ͍ίʔυͷւ͕͕͓ͬͯ Γɺςετͮ͠Β͍ʣ • ϢʔβʔΛ͍ؒͨͤΔ͜ͱͳ͘࠷େ10ຕͷը૾ ΞοϓϩʔυΛ࣮ݱ͍ͤͨ͞ • Ϣʔβʔ͕Ξοϓϩʔυͨ͠ը૾Λ৭ʑͳίϯςϯπ Ͱ͏ͨΊʹ৭ʑͳαΠζʹม͍ͨ͠
Γ͍ͨ͜ͱ • jQueryΛ٫͍ͨ͠ʢͻͲ͍ίʔυͷւ͕͕͓ͬͯ Γɺςετͮ͠Β͍ʣ • ϢʔβʔΛ͍ؒͨͤΔ͜ͱͳ͘࠷େ10ຕͷը૾ ΞοϓϩʔυΛ࣮ݱ͍ͤͨ͞ • Ϣʔβʔ͕Ξοϓϩʔυͨ͠ը૾Λ৭ʑͳίϯςϯπ Ͱ͏ͨΊʹ৭ʑͳαΠζʹม͍ͨ͠
ղܾࡦ Stimulus + Jest
Stimulus • Basecamp͕ࣾग़͍ͯ͠Δʮ߇͑Ίͳ৺ʯΛ࣋ͬͨϑ ϨʔϜϫʔΫ • HTMLͱJavaScriptΛdataଐੑͰܨ͙ • HTMLΛݟΔ͚ͩͰͲͷΑ͏ͳৼΔ͍Λ͢Δͷ͔͕Θ͔Δ • ಉ͡తͷίʔυΛάϧʔϓԽͤ͞ΔͷͰɺࣗͷίʔυ͕
ʮJavaScriptͷւʯʹຒΕΔͷΛ͙ • DOMͷϥΠϑαΠΫϧΛཧ͢Δ
Jest • FacebookJavaScriptςετπʔϧ • Reactͱͷੑߴͦ͏ • ಋೖָ͕ͦ͏ʢZero Configurationʣ • RSpecΈ͍ͨͰॻ͖ํʹ͠Έ͕͋Δ
const sum = require('./sum'); test('adds 1 + 2 to equal 3', () => { expect(sum(1, 2)).toBe(3); });
Γ͍ͨ͜ͱ • jQueryΛ٫͍ͨ͠ʢͻͲ͍ίʔυͷւ͕͕͓ͬͯ Γɺςετͮ͠Β͍ʣ • ϢʔβʔΛ͍ؒͨͤΔ͜ͱͳ͘࠷େ10ຕͷը૾ ΞοϓϩʔυΛ࣮ݱ͍ͤͨ͞ • Ϣʔβʔ͕Ξοϓϩʔυͨ͠ը૾Λ৭ʑͳίϯςϯπ Ͱ͏ͨΊʹ৭ʑͳαΠζʹม͍ͨ͠
͜Ε·Ͱͷը૾Ξοϓϩʔυ ΦϦδφϧը૾ͱ αϜωΠϧΛΞοϓϩʔυ • αϜωΠϧը૾ͷ࡞ • EXIFใͷमਖ਼ 1ຕͣͭը૾ΛΞοϓϩʔυ Amazon EC2
Amazon S3
S3ͷDirect Upload ॺ໊͖ͭURLΛ dataଐੑͱͯ͠ηοτ ෳͷը૾Λ ඇಉظͰΞοϓϩʔυ access_key_idͱ secret_access_keyΛऔಘ ̍ ̎
̏ Amazon EC2 Amazon S3 IAM
Γ͍ͨ͜ͱ • jQueryΛ٫͍ͨ͠ʢͻͲ͍ίʔυͷւ͕͕͓ͬͯ Γɺςετͮ͠Β͍ʣ • ϢʔβʔΛ͍ؒͨͤΔ͜ͱͳ͘࠷େ10ຕͷը૾ ΞοϓϩʔυΛ࣮ݱ͍ͤͨ͞ • Ϣʔβʔ͕Ξοϓϩʔυͨ͠ը૾Λ৭ʑͳίϯςϯπ Ͱ͏ͨΊʹ৭ʑͳαΠζʹม͍ͨ͠
ैདྷͷߏ • ը૾มͷ͘͠Έ • ϦαΠζɾΫϩοϓɾը࣭ͷௐΩϟογϡػೳΛඋ͑Δ
ैདྷͷߏ • ɿӡ༻͕ൃੜ • ϛυϧΣΞͷߋ৽ΞϥʔτରԠ
S3ͷDirect Upload ॺ໊͖ͭURLΛ dataଐੑͱͯ͠ηοτ ෳͷը૾Λ ඇಉظͰΞοϓϩʔυ access_key_idͱ secret_access_keyΛऔಘ ̍ ̎
̏ Amazon EC2 Amazon S3 IAM &9*'ใΛ मਖ਼͍ͯ͠ͳ͍
ImageFluxͱ ̍ຕͷը૾Λͱʹը૾ͷ֦େॖখɺΓൈ͖ɺ߹ͳͲͰσ όΠεʹ࠷దԽ͞Εͨը૾Λ؆୯ʹੜ͠ɺߴ͔ͭߴ࣭Ͱ ৴͢ΔαʔϏε
ImageFluxར༻ޙͷߏ ը૾ॲཧΛ·ΔͬͱImageFluxʹ͓ͤ͢Δ͜ͱ Ͱը૾पΓͷӡ༻͔Βղ์͞ΕΔ
݁Ռ • ը૾ͷߘ 1.7ഒ • 30595ຕˠ52622ຕ ϦϦʔεޙ4ϲ݄ͷ૯ը૾ߘΛલಉ݄ͱൺֱ • मਖ਼֦ுʹڧ͍ઃܭʹͳͬͨ
ࣦഊஊ
Vanilla JSͷDOMੜ _createThumbnailField(data) { const thumbnailFieldList = document.querySelector(`.js_${this.category}-thumbnail-field-list`) const thumbnailFieldWrapper
= document.createElement('div') thumbnailFieldWrapper.dataset.controller = 'string-counter' thumbnailFieldWrapper.dataset.target = 'thumbnail-field.item' thumbnailFieldWrapper.dataset.stringCounterMax = 20 thumbnailFieldWrapper.className = 'post-pictures-attachments' const thumbnailFieldBackground = document.createElement('div') thumbnailFieldBackground.className = 'os1-container-background' thumbnailFieldBackground.classList.add('-background-color-gold') thumbnailFieldBackground.classList.add('-margin-bottom-M') const hiddenObjectKey = this.createHiddenObjectKey(data.objectKey) const hiddenCategory = this.createHiddenCategory() const hiddenContentType = this.createHiddenContentType('review') this._createReviewThumbnailField({ data, thumbnailFieldBackground, hiddenObjectKey, hiddenContentType, hiddenCategory, }) thumbnailFieldWrapper.appendChild(thumbnailFieldBackground) thumbnailFieldList.appendChild(thumbnailFieldWrapper) }
_createThumbnailField(data) { const thumbnailFieldList = document.querySelector(`.js_${this.category}-thumbnail-field-list`) const thumbnailFieldWrapper = document.createElement('div')
thumbnailFieldWrapper.dataset.controller = 'string-counter' thumbnailFieldWrapper.dataset.target = 'thumbnail-field.item' thumbnailFieldWrapper.dataset.stringCounterMax = 20 thumbnailFieldWrapper.className = 'post-pictures-attachments' const thumbnailFieldBackground = document.createElement('div') thumbnailFieldBackground.className = 'os1-container-background' thumbnailFieldBackground.classList.add('-background-color-gold') thumbnailFieldBackground.classList.add('-margin-bottom-M') const hiddenObjectKey = this.createHiddenObjectKey(data.objectKey) const hiddenCategory = this.createHiddenCategory() const hiddenContentType = this.createHiddenContentType('review') this._createReviewThumbnailField({ data, thumbnailFieldBackground, hiddenObjectKey, hiddenContentType, hiddenCategory, }) thumbnailFieldWrapper.appendChild(thumbnailFieldBackground) thumbnailFieldList.appendChild(thumbnailFieldWrapper) } Vanilla JSͷDOMੜ THIS IS ZIGOKU
ϦΞϧDOMͰԾʢతʣDOM 1. ςϯϓϨʔτΛViewϑΝΠϧʹஔ͍͓ͯ͘ 2. MutationObserverͰಛఆͷHTMLཁૉΛࢹ 3. ը૾ΞοϓϩʔυޙʹඞཁͳใΛͦͷHTMLཁૉͷ attributesͱͯ͠ηοτ 4. MutationObserver͕Ԡ͠ɺςϯϓϨʔτͷCloneʹͦ
ΕͧΕͷΛೖΕͨͷΛAppend
ՆͷΠϯλʔϯγοϓ ։࠵͠·͢ʂ
ΈΜͳͷΣσΟϯά ՆͷΠϯλʔϯ in ԭೄ ࣌ɿ8݄22ɾ23ʢ༧ఆʣ ձɿླྀٿେֶֶ෦ ࣮ࡍͷαʔϏεʹػೳΛՃͯ͠ RubyͱRailsͷجຊΛֶ΅͏ʂ ৄ͘͠connpass (https://mwed.connpass.com/)
Ͱ 21ଔ͚
͋Γ͕ͱ͏͍͟͝·ͨ͠