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ԾDOMςϯϓϨʔςΟϯά֓೦ͰੈքΛม͑Δͧʂ
@mizchi
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About
— mizchi
— JSͰSPA࡞Δਓ
— ΰάϚδΦεͨ͠
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స৬͠·ͨ͠
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No content
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ԾDOMͷ
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ϖʔδϟφΠτʹͯ
— աڈͷࢿྉ: ͓લࣗͪͷϖʔδϟUI͕ຊʹ͍ͱࢥͬ
ͯΜͷʁ // Speaker Deck
— ཁ
— σʔλόΠϯυͰjQueryͷૢ࡞ආ͚ͯཧίετԼ͛ͨ
͔ͬͨ
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ࠓճͷϨΠϠʔ
HTMLจࣈྻ => ߏங ͕͍
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ຊΞτϛοΫૢ࡞͍ͨ͠
— ৗʹಉ͡ೖྗ(JSON)͔Βಉ͡ग़ྗ(DOM)Λ͍ͨ͠
— ଐੑॻ͖͑ͯθϩ͔Βશ෦ߏங͍ͨ͠
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ͭ·ΓͲ͏͍͏͜ͱ͔
//Ͳ͔͜ͰݺΕΔϋϯυϥ
var count = 0;
function onClick(){count++; update()};
//ΫϦοΫͷʹຖճݺͼ͍ͨʂʂʂ
function update(){
document.body.innerHTML = '';
var html = renderHTML({count: count});
document.body.innerHTML = html;
}
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ϠόΠ
ϖʔδભҠ૬
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ԾDOMͱ
— ≠ ϥΠϒϥϦ
— ৽͍͠ϑϩϯτΤϯυʮ֓೦ʯ
— facebook/react
— Matt-Esch/virtual-dom
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༻ޠཧ
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HTML
จॻߏΛࣔ͢ʮจࣈྻʯ
※௨ৗͷςϯϓϨʔτΤϯδϯͷλʔήοτ
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DOM
HTML͔Βੜ͞ΕΔϒϥβ্ͷʮΠϯελϯεʯ
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ԾDOM
DOMͱҰରҰʹରԠ͢Δߏମ(͋ͱͰৄ͘͠)
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ԾDOMͷ֓೦
1. ϢʔβৗʹʮԾͷʯDOMͷߏΛϓογϡ
2. ϥΠϒϥϦ͕લޙͷԾDOMͷdiffΛ࡞Δ
3. diff͔ΒʮຊͷʯDOMɺߏͷૢ࡞Λpatch͢Δ
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ୡ͞ΕΔ͜ͱ
— patchॲཧͳͷͰര
— DOMΛલʹ͢Εdiffίετ(΄΅)ແࢹͰ͖Δ
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ςϯϓϨʔτΤϯδϯͷݶք
— ԾDOM ≠ HTMLςϯϓϨʔτ
— จࣈྻΛܦ༝͢ΔͱΠϕϯτϋϯυϥΛͤͳ͍
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facebook/reactͷΞϓϩʔν
— JSXͱ͔͍͏HTMLຒΊࠐΈ֦ுݴޠ
var div = React.DOM.div;
var app =
Hello, React!
;
(E4X…͍ɺͳΜͰͳ͍)
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JSXΘͳ͍Ξϓϩʔν
— ֤छAltJSϓϦίϯύΠϥͱ૬ੑ࠷ѱ(ύʔα௨Βͳ͍)
— Πϯελϯεʹ৮ΔͨΊʹݴޠDSLͰԾDOMੜ͍ͨ͠
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ݴޠDSLͰԾDOM……?
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=> ςϯϓϨʔτΤϯδϯ
ͩʂʂʂʂ
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ྫ: react-kup(CoffeeScript)
ReactKup ($) ->
$.ul {className: 'container'}, ->
for i in [1..10]
$.li {key: i}, "index:"+i
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ྫ: Om(ClojureScript)
(defn widget [data owner]
(reify
om/IRender
(render [this]
(dom/h1 nil (:text data)))))
Sࣜ
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ྫ: elm-html(elm)
yogi : Html
yogi =
img [ src "http://elm-lang.org/yogi.jpg"
, style
[ prop "width" "100%"
, prop "height" "100%"
]
]
[]
※ virtual-domόοΫΤϯυ
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— աʹϓϩάϥϚϒϧ
— ίʔυಡΊͳ͍σβΠφͳΜ͍ͯͳ͔ͬͨΜͩʂ
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ී௨ͷςϯϓϨʔτΤϯδϯ(HTML)Λ͍·ΘͤΔʁ
— طͷͷͩͱ react-jade(jade) ͋Δ༷
— HTML to Virtual DOM ม͋Δ
— reactjs/react-magic
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طଘͷʮςϯϓϨʔτΤϯδϯʯͷ֓೦্ͷ
— จࣈྻܦ༝͢ΔͱΠϕϯτϋϯυϥ͕ѻ͑ͳ͍
— ࠷దԽʹkeyଐੑ͕ඞཁ(diffΞϧΰϦζϜʹର͢ΔϢχʔΫ
ωεอূ)
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ݴ͍͔ͨͬͨ͜ͱ
— ԾDOMύϥμΠϜνΣϯδ
— ·ͩύʔπ͕Γͳ͍
— ͦ͏͍͑ʮJavaScriptΤϯδχΞཆಡຊʯങͬͯͩ͘
͍͞
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ͬͯΈͨ
mizchi/my-feed-reader
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— 2ͰRSSϦʔμʔ࡞Εͨ
— ͳ͓࡞Δඞཁͳ͔༷ͬͨ
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͓ΘΓ