Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
우아한 자바스크립트 개발
Search
nigayo
April 13, 2018
Technology
11
7.1k
우아한 자바스크립트 개발
자바스크립트 코딩을 좀더 우아하게 하는 방법을 고민합니다.
nigayo
April 13, 2018
Tweet
Share
Other Decks in Technology
See All in Technology
20250708オープンエンドな探索と知識発見
sakana_ai
PRO
4
1k
60以上のプロダクトを持つ組織における開発者体験向上への取り組み - チームAPIとBackstageで構築する組織の可視化基盤 - / sre next 2025 Efforts to Improve Developer Experience in an Organization with Over 60 Products
vtryo
3
1.9k
Deep Security Conference 2025:生成AI時代のセキュリティ監視 /dsc2025-genai-secmon
mizutani
4
2.9k
公開初日に Gemini CLI を試した話や FFmpeg と組み合わせてみた話など / Gemini CLI 初学者勉強会(#AI道場)
you
PRO
0
1.3k
AI エージェントと考え直すデータ基盤
na0
20
7.9k
AWS Well-Architected から考えるオブザーバビリティの勘所 / Considering the Essentials of Observability from AWS Well-Architected
sms_tech
1
110
Contract One Engineering Unit 紹介資料
sansan33
PRO
0
6.9k
スタックチャン家庭用アシスタントへの道
kanekoh
0
120
Microsoft Defender XDRで疲弊しないためのインシデント対応
sophiakunii
1
320
An introduction to Claude Code SDK
choplin
2
1.2k
クラウド開発の舞台裏とSRE文化の醸成 / SRE NEXT 2025 Lunch Session
kazeburo
1
590
Amplify Gen2から知るAWS CDK Toolkit Libraryの使い方/How to use the AWS CDK Toolkit Library as known from Amplify Gen2
fossamagna
1
350
Featured
See All Featured
Measuring & Analyzing Core Web Vitals
bluesmoon
7
520
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
750
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
251
21k
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
A Modern Web Designer's Workflow
chriscoyier
695
190k
What's in a price? How to price your products and services
michaelherold
246
12k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
8
340
How to Ace a Technical Interview
jacobian
278
23k
A designer walks into a library…
pauljervisheath
207
24k
Typedesign – Prime Four
hannesfritz
42
2.7k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
35
2.4k
Embracing the Ebb and Flow
colly
86
4.8k
Transcript
ইೠ߄झ݀ѐߊ ٘झ௪٘ ਮࣻ
٘झ௪٘݃झఠૉझੌ࢚ 13$PEF3FWJFX
const msnia = Array.from && Array.from({length: 40}, (v,i)=>++i) || Array.apply(null,{length:40}).map(Function.call,
Number).map((v)=> ++v); எ࠭౭j
֙ IUUQTXXXTMJEFTIBSFOFUKJTVZPVODMFBOGSPOUFOEEFWFMPQNFOU
ইೣۆޖੋо جইр
ܽ ܻ؊࠶_ ޥঌѢ э Բ х࢚ೞҊ र ױࣽೞӝ Ӓহח ࢚غח
ಬ ঋח ળࢎی ߓ۰ೞח
ಿઓղ ੌৈਬ ѐߊইೠ
ӒۢীبࠛҳೞҊ ইೠ߄झ݀ѐߊ
ܽ٘оޤীਃ ӒրաীೞݶऔѱೡѢэӒѪ
ই ӵ Ֆ ೧ ӵՖೠѪજ݅ ӒѪইੌࠗ࠙ ޤ۠Ѣ
߸҃ਸਤೠ٬ 6*חખ؊बೠ٠
ஹೊఠо೧ೞח٘ ߡӒহח٘ ѱоࢎۈऔѱ೧ೞח٘$ খਵ۽بߡӒহח٘
Ѿۿ
оةࢿGJSTU
Ӓۢ ࢿמन҃উॳջ ࠂೠޙઁоইפۄݶ ରରೞחѦ۽ ਃೡٸೞחѦ۽j оةࢿGJSTU
ܽ٘ۚ ઁөਬೞחࢲ࠺झীਃ যڃӝמ୶оؼભ ࢎਊחযڃࢎۈٜભ যڃജ҃ীࢲزೞભ ־о۽ਬࠁࣻೠؘਃ
դউೠ
Ӓী ܽࢸ҅ ׯইפջ
ࢎਊೞחଃ٘ܳݢҳഅೞӝ const modal = new Modal({..}); const slider = new
Slider({..}); const service = new ServiceMain(); service.addPlugin(modal, slider); service.on({//do something}); য࢝ೞঋਸٸөೠ ݈ ੌೠѢ
ࢸ҅ѐߊೠ Ӓ۠࠺ਯহ ࢎҊܴীݏ٣ੋೞӝ рױೞҊ ݺഛೠҳઑоաৢٸө҅ࣘࢸ҅
ೣࣻࣻળࢸ҅ ܴ݅ੜਵݶррࢸ҅ ࢸ҅оউજਵݶજܴաৢࣻহ ۄఠ৬߈ജী ҳഅറীחࢸ҅ഥҊ جইࠁפܴҗ߈ജ׳ۄj
GPP ઃ ־оܴખয
WTDPEFীࢎ۞Ӓੋਃೞ
ҳੋ NFBOJOH ܳࠗৈೞ time => currentTime data => addressData
ҳੋ NFBOJOH ܳࠗৈೞ const splitted = input.split('$')[0]; const studentName =
input.split('$')[0];
ೣࣻ sޖਸೞs calculate => calculateNextValue
HFU999 HFUޤӡযঠ ࢚ೡࣻחߧਤীࢲزೞب۾
ডযইצডযبডয async function async() { const int = 3; var
array = await resolveAfter2Seconds(); console.log(array); }
circle = 3.14 * r * r; d = _erx
* 999; হחंחઁߊj
//ೣࣻࢶ function execSomething({ width, height }) { console.log(width, height); }
//ࠗܰӝ execSomething({ width: 20, height: 400, maxNumber: 300, minNumber: 100 }); PCKFDUMJUFSBMܳਊೠݒѐ߸ࣻ׳
ಞউೠ٘ ೠ׀хҊ੍ח
ӛࢶ٘դӛੋੋр if(! (typeof data === “string”)) else … )
ઑѤޙೣࣻܳજই೧ਃ if( n % 1 === 0 ) { console.log(“ࣻ
”) } if( isInt(n) ) { console.log(“ࣻ ”) } +
ࠛਃೠݒೝহগӝ var todo = { "todo" : “todo", "done" :
“done”, , :- }
ܻ݅࠺ methodA(obj.methodA()[3], obj.methodB()[2]);
ա־ݶӝࢄߓоظਃ const data = []; [1,2,3,4,5].forEach((v,i) => { if(v%2) {
data.push(v); console.log(`${v} is added`); } }); [1,2,3,4,5].filter(v => v%2).forEach(v=>console.log(`${v} is added`)); ߹۽ જই
ೠ ܻ࠙աܻ࠙ݽইفӝ ݃աܻ࠙೧ঠೡө
эੑ۱ূ טэ۱ਵ۽߈ജ 3FGFSFOUJBMUSBOTQBSFODZ average([10,20,30,40]); //25 పझоएਕѤؒ
࢚కܳऔѱ࢚ೞӝ оәJNNVUBCMF let arr = [5,1,23,52,2]; const sortedArr = [...arr].sort((a,b)
=> a-b); console.log(arr, sortedArr);
ࢎҊܴਵ۽زೞחѤજ DIBJOJOH DPNQPTJUJPO const ArrayParser = str => { return
pipe(splited, _map(trimed), _map(removeBracket), resultToObj)(str) }
୭Ӕળਵ۽؊উೞҊಞউೠ٘ܳ DPOTUҗMFUਵ۽ਤӝ EFGBVMUQBSBNFUFS۽r]]sೞӝ BSSPXGVODUJPOਵ۽рױҊରೣࣻഅೞӝ &4
function Animal(name) { this.name = name; } Animal.prototype.speak = function()
{ console.log(this.name + ' makes a noise.'); } function Dog(name) { Animal.call(this,name); } Dog.prototype = Object.create(Animal.prototype); Dog.prototype.speak = function() { console.log(this.name + ' barks.'); } var myDog = new Dog("ൟو"); myDog.speak(); class Animal { constructor(name) { this.name = name; } speak() { console.log(this.name + ' makes a noise.'); } } class Dog extends Animal { speak() { console.log(this.name + ' barks.'); } } var d = new Dog('ൟو'); d.speak(); Ӓؘ۠ QSPUPUZQFঌҊॳӝਃ` ׳ೞ
addEventListener('fetch', event => { event.respondWith(async function() { const cache =
await caches.open(‘v1'); const cachedResponse = await cache.match(event.request); if (cachedResponse) { return cachedResponse;} const fetchedResponse = await fetch(event.request); const fetchObj = await cache.put(event.request, fetchedResponse.clone()); return fetchedResponse; }()); }); self.addEventListener('fetch', function(event) { event.respondWith( caches.open('v1').then(function(cache) { return cache.match(event.request).then(function (response) { return response || fetch(event.request).then(function(response) { cache.put(event.request, response.clone()); return response; }); }); }) ); }); ҡଳই ؊જই 0 оә؊աইࠁחޙߨࢎਊ
٘ࣻয۵ݶ tӒېܻীѲࢳয” ঌӝয۰۽ਸഅ ۽Ӓ۔ܴഅ ҊѢܻ৬ೠ҅١хਸӝ ܲѐߊীѱ׳೧חݒࢎ೦
ࠂೞפफఠۄ ੌࠗ۞ۧѱҊщա
function run(arg) { if(arg !== 10) return; //do something… }
ইצѤ ࡈܻ߈ജೞӝ ߈ࠂޙীࢲחࡈܻDPOUJOVF FMTFޙبਃহ
for (let i = range - 1; i < d.length;
i++) { let sum = 0; for (let j = (i - range + 1); j <= (i); j++) { sum += d[j]; } result.push(sum); } for(var i=0; i<range; i++) { sum += d[i]; } for(var j=i-1; j<d.length; j++) { if(j === (range-1)) { console.log(j + "ө "+ range + "ѐ : ", sum); continue; } let start = j-(range); sum += d[j] - d[start]; console.log(j + 1 + "ө" + range + "ѐ : ", sum); } …. Ӓրշف݈ӝ ߹۽ જই ଵҊߓৌ<j/>ө ୭Ӕ.ѤಣӐਸҳೞח۽Ӓ۔
ࠂೞݶ ա־ࣁਃ return Array.from && Array.from({length: 40}, (v,i)=>++i) || Array.apply(null,{length:
40}).map(Function.call, Number).map((v)=> ++v); ٣ߡӦएਕחѤؒ
ࠂೠ֗ࢳਸऀѹߡܻӝ const checking =/^(([^<>()\[\]\\.,;:\s@“]+(\.[^<>()\ [\]\\.,;:\s@“]+)*)|(“.+”))@((\[[0-9]{1,3}\.[0-9]{1,3}\. [0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z] {2,}))$/.test(str); ࢎਊغחѤؒ const validEmail
= isValidEmail(eMail); ࣗࢎ
attr = (el, ...attr) =>(attr.some((k, i)=>{ eif(i % 2) return;
econst v = attr[i + 1]; eif(typeof el[k] == 'function') el[k](...(Array.isArray(v)? v :[v])); eelse if(k[0] == '@') el.style[k.substr(1)] = v; eelse el[k] = v; }), el); //ࢎਊ attr(sel(`#btn1`), e'@background', 'red', //झఋੌ e'innerHTML', 'write', //ࣘࢿ e'addEventListener', ['click', _=>post()] //߮ ); য٣ࢲࠌ؊ۄ ࠂೠ֗ࢳਸऀѹߡܻӝ
ёҙ҅ܳాೠઑѤޙহগӝ const moveCharacter = ({character, cmd, step}) => { //actionsਸ
ҙ҅۽ ࢸ೧فӝ. const Actions = { run(character,step) { return `${character} run ${step} meter`; }, jump(character, step) { return `${character} jump ${step} meter`; }, swim(character,step) { return ` ${character} swim ${step} meter`; } }; return Actions[cmd] && Actions[cmd](character, step); } moveCharacter({character:"crong", cmd:"jump", step:300}); moveCharacter({character:"codesquad", cmd:"run", step:10}); moveCharacter({character:"crong", cmd:"swim", step:1000});
ੌҙؽ ցоযڌѱૢդ࢚ػפө
୭ࣗೠ٬ஶ߮࣌ਬೞӝ য٣ীޙܳॶ @৬חઁॶ &4 &4
jӝఋ١١ OBNJOHSVMF݅ੜٜযبޤ
߈ࠂܻܳ݃ҳ߈ࠂೞ݈ tGPSGPS&BDISFEVDFNBQGJMUFSGPSPGXIJMFju ޖਸઁॶѪੋо DIBJOJOHਵ۽അೡѪੋо Ҋରೣࣻࢶয٣ীࢲೡѪੋо
फযبਸਤ೧ ݏ୶ۄ
001 ୶࢚ച ङച ࢚ࣘ ഋࢿjޖࢲߡ
40-*% ੜݽܰѷਵݶ ߸҃ীੜೞחٜ٘ܳ݅যࠁ
ېझҳઑܳױࣽೞѱਬ ࠂೠ࢚ࣘjஞݎೠ JNBHFIUUQNPOLFZTJNBHJOBSZSFBMJUJFTDPNJNBHFTGG+BWBHJG
ٸۿ ࢚ࣘन NJYJOաࢿ DPNQPTJUJPO //Super class const Character =
class { constructor(name) { this.name = name; } } //methods function walk() { console.log(this.name, "is walking")} function run() { console.log(this.name, "is running")} function jump() { console.log(this.name, "is jumping")} function swim() { console.log(this.name, "is swimming:")} function fly() { console.log(this.name, "is flying")} let man = new Character("caly"); walker = Object.assign(man, {walk, run}); let spyderMan = new Character("robert"); walker = Object.assign(spyderMan, {walk, run, jump}); let ironMan = new Character("caly"); walker = Object.assign(walker, {walking}, {running}, {jumping}, {fly}); spyderMan.run();
ࢲ࠳ӝמ߄Ոٜ ݫੋӝמӒ۽ ઓࢿਸੑೞҊ ࠺तೠزੌҙػ"1*۽ز %* 0$1 MPDBMTUPSBHF JOEFYFE%# const A
= class { … getDage(data) { //ࢲ࠳ӝמ ݽف getDataܳ ࢎਊ return this.repo.getData(); } } const a = new A(new idxDBStrorage());
ࣻоইפݶ ২࣌ਵ۽ઁҕ var options = { tooltip: { grouped: true,
template: function(category, items, categoryTimestamp) { var head = '<div>' + category + '</div>', body = tui.util.map(items, function(item) { return '<div>' + item.value + ':' + item.legend + '</div>' }),join(''); return head + body; } } }; tui.chart.lineChart(container, data, options); DPEFIUUQTHJUIVCDPNOIOFOUUVJDIBSUCMPCQSPEVDUJPOEPDTXJLJGFBUVSFTUPPMUJQNEFYBNQMF
ېझী উ݃۲ೞӝ const privateMethods = { privateMethod () { console.log(this.say);
} } export default class Service { constructor () { this.say = "Hello"; } publicMethod () { privateMethods.privateMethod.call(this); } } DPEFIUUQTNFEJVNDPN!EBWJESIZTXIJUFQSJWBUFNFNCFSTJOFTECDDEB 4ZNCPMTਸਊೡࣻبೣ
ী۞ܻ ѐߊٜীѱо٘ܳ೧ࠁ
ী۞ܻڙڙೠݒ
ࢎਊۄ࠳۞ۄݶ DVTUPNFSSPSبݧ class MyError extends Error { constructor(message) { super(message);
this.message = message; this.name = '[FOO Service Error]'; } } class FooTypeError extends MyError { constructor(message) { super(message); this.message = message; this.name = '[FOO Service Type Error]'; if (Error.captureStackTrace) { Error.captureStackTrace(this, FooTypeError)} } } function setName(name) { if(typeof name !== "string") throw new FooTypeError("setName() : string ఋੑ݅ ೲਊפ"); //do something } function run() { try { setName(12345); }catch (e) { if(e instanceof MyError) { console.log(` ${e.stack}`); } else { console.log(e); } } } run(); VM922:28 [FOO Service Type Error]: setName() : string ఋੑ݅ ೲਊפ
Ѥ୷ ܻಂష݂ইѤ୷җܰ
ࠂೠ٘оաয়ӝী ૣӝܻಂష݂ ࢸ҅ ѐߊ ܻಂష݂ ࢸ҅ ѐߊ ܻಂష݂ ࢸ҅ ѐߊ
ܻಂష݂ ࢸ҅ ѐߊ ಂష݂
ܻಂష݂दࠂਸহগחѪࠗఠ JNBHFIUUQXXXTFFEPGUPNPSSPXDPNXQDPOUFOUVQMPBETDMPOFKQH ❌ ❌ ❌
ӝ݅ৈաоب߈ࢿҕ✌ ېझ ೣࣻ
৻۽ੜޅೞח ੋݒѐ߸ࣻੜॳӝ ё ֎झಕझ ېझࢎਊ ߸ࣻઁѢ
ղࠗܳࠁഐೞۄ const _ = (function CodeSquadUtil() { let innerValue =
""; const print = function(msg) {console.log(msg)} const min = function() { return 'min'}; const sumBy = function() {}; const round = function() {}; return {min, sumBy, round} })(); console.log(_.min());
ݯߡ߸ࣻח߸ࣻ৬ޤоܲо class Todo { constructor(id, task){ this.id = id; this.task
= task; this.state = ‘todo; this.time = {}; this.Seconds = 1000; this.resultList = 1000; this.lastTime = 1000; this.buffer = 1000; } update(state){ this.state = state; } …
ۄ࠳۞ܻо٘
WBOJMMB"1* হחѪٜ݅যࠁӝ ۄ࠳۞ܻॳӝ
class smartCollection extend Array { exec() { …} } Ѥ٧ࣻҊ
Ѥ٘۰ঠೞחѤইפ OBUJWF"1*ա ۄ࠳۞ܻחખ؊উೞѱഛೞӝ
ۨਕоܻ٘ܳܽೞѱ೧ঋ؊ۄ MJGFDZDMF߸ചܳળ3FBDU MJGFDZMFਸٜ݅ਵա بೠѪۢੜॳޅೞ؊ۄj
જبҳبॳӝաܴ 'SBNFXPSLח୭ࣗೠࣻળਸਬ೧ળ ࠺زӝܻחযוदীೡѪੋо যڌѱUFNQMBUJOHসਸೡѪੋо ܴਸযڌѱਸѪੋо ஹನքӝחযוب۽ೡѪੋо
ؘఠܻחযڃݫࢲ٘ܳॳݶࢲܻೡѪੋо ஹನքрؘఠ׳যڌѱೡѪੋо ۨਕоܻ٘ܳܽೞѱ೧ঋ؊ۄ
݄݃ਵ۽
ܽ٘חթਸߓ۰ೞח٘ Ӓؘ۠ ѾҴ աܳߓ۰ೞח٘ӝبೞ
tܽ٘חѐߊޙചѾҗޛ Րহࢸٙೞۄ աܳਤ೧ u ܻ࠭ޙച ಕয۽Ӓې߁ ೣԋࢿೞӝ ಿࢶ
݆ଵҊ೮Ҋ ഴܯೠܐٜ IUUQTHJUIVCDPNSZBONDEFSNPUUDMFBODPEFKBWBTDSJQU IUUQTHJUIVCDPNBJSCOCKBWBTDSJQU
хࢎפ ٘झ௪٘ ਮࣻ DSPOH!DPEFTRVBELS