Customizing ES6 via well-known symbols
In ECMAScript 6, the object Symbol has several properties that contain so-called well-known symbols (Symbol.iterator, Symbol.hasInstance, etc.). These let you customize how ES6 treats objects. This blog post explains the details. Warning  # Implementation of the features described here is work in progress. Consult the “ECMAScript 6 compatibility table†for what is supported where (spoiler: not muc
Read Exploring ES6 | Leanpub
What you need to know about this book This book is about ECMAScript 6 (also called ECMAScript 2015), a new version of JavaScript. Audience: JavaScript programmers In order to understand this book, you should already know JavaScript. If you don’t: my other book “Speaking JavaScript†is free online and teaches programmers all of JavaScript (up to and including ECMAScript 5). Why should I read this b
ES6 moduleã®top levelã«ã‚ã‚‹`this`ã®å€¤ã¯ä½•ã«ãªã‚‹ã®ã‹?
Babel å‰æ Babelã¯å…¥åŠ›ã•ã‚ŒãŸã‚³ãƒ¼ãƒ‰ã‚’ES6 moduleã¨ã—ã¦æ‰±ã† Babel assumes that all input code is an ES6 module FAQ · Babel (çµè«–çš„ã«ã¯--blacklist strictã§ã“ã®æŒ™å‹•ã¯ç„¡åŠ¹åŒ–ã§ãã‚‹) ES6 moduleã®å‰æçŸ¥è˜ Environment Recordã¨ã„ã†ã®ã¯ãã®ã‚¹ã‚³ãƒ¼ãƒ—ã¨å¤‰æ•°ã‚’関連付ã‘ãŸã‚Šã™ã‚‹ã‚ˆã†ãªç’°å¢ƒæƒ…å ±çš„ãªã‚‚ã®ã‚’å…¥ã‚Œã‚‹å ´æ‰€ 関数ã¨ã‹ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã¨ã‹with用ã¿ãŸã„ãªä½•ç¨®é¡žã‹ã‚ã‚‹ Moduleã¯Module Environment Recordsã®ã‚’作ã£ã¦ãã“ã«æƒ…å ±ã‚’è¨˜éŒ²ã™ã‚‹ Module Environment Recordsã¯declarative Environment Recordã®ä¸€ç¨®ã§ã€åŠ ãˆã¦Module専用ã®è¨˜éŒ²é ˜åŸŸãŒã‚ã‚‹(importã®bindingã®ãŸã‚ã®å ´æ‰€) 基本的ãª
Deploying ECMAScript 6
This blog post describes the options you have for deploying ECMAScript 6 in current JavaScript environments. It is selective w.r.t. the amount of tools it covers. If you want a comprehensive list of tools, I suggest you look at Addy Osmani’s “ECMAScript 6 Toolsâ€. Consult the blog post “Using ECMAScript 6 today†for an overview of ES6 features. Using ECMAScript 6 today  # What options do you have f
ES6 Modulesã¯HTTP/2ã«ã‚ˆã£ã¦concatç„¡ã—ã§ä½¿ãˆã‚‹ã‚ˆã†ã«ãªã‚‹ã®ã‹ - teppeis blog
HTTP2 時代ã®ã‚µãƒ¼ãƒã‚µã‚¤ãƒ‰ã‚¢ãƒ¼ã‚テクãƒãƒ£ãƒ•ã‚£ãƒ¼ãƒ‰ãƒãƒƒã‚¯ - Togetterã¾ã¨ã‚ ã®ã‚ãŸã‚Šã§è©±ã—ã¦ã„ãŸã“ã¨ã®ã¾ã¨ã‚。 補足 タイトルã§ã€ŒES6 Modulesã£ã¦concatã—ãªã„ã¨å‹•ã‹ãªã„ã®ï¼Ÿã€ã¨ä¸€éƒ¨ã«èª¤è§£ã‚’与ãˆã¦ã—ã¾ã£ãŸã‚ˆã†ãªã®ã§è£œè¶³ã€‚ES6 ModulesãŒãƒ–ラウザã«ãƒã‚¤ãƒ†ã‚£ãƒ–実装ã•ã‚ŒãŸã‚‰ã€å½“然concatã—ãªãã¦ã‚‚å‹•ãã¾ã™ã€‚ ã“ã“ã§æ›¸ããŸã‹ã£ãŸãƒ†ãƒ¼ãƒžã¯ã€ŒES6 Modules + HTTP/2 + concat無㗠㯠ES6 Modules + HTTP/1 + concat ã¨åŒç‰ã®é€Ÿåº¦ã§å‹•ä½œã™ã‚‹ã®ã‹ã€ã§ã™ã€‚ 追追記 (2016/01) kazuhoã•ã‚“ã¯h2o㧠Cache Aware Server Push ã¨ã„ã†è§£æ±ºç–ã‚’æ案ã—ã¦ã„ã¾ã™ã€‚ Jxckã«ã‚ˆã‚‹æ—¥æœ¬èªžè§£èª¬è¨˜äº‹: HTTP/2 Push ã‚’ Service Worker + Cache Aware Server
new.targetメタプãƒãƒ‘ティã«ã¤ã„㦠- JS.next
æ¦‚è¦ ã€Œnew.targetã€ã¨ã¯ã€ES2015ã§å°Žå…¥ã•ã‚ŒãŸãƒ“ルトインクラスã®ã‚µãƒ–クラスを作る上ã§æ¬ ã‹ã›ãªã„å˜åœ¨ã§ã‚ã‚‹[[newTarget]]ã‚’å–å¾—ã™ã‚‹ãŸã‚ã®ãƒ¡ã‚¿ãƒ—ãƒãƒ‘ティã§ã‚る。 従æ¥ã®å•é¡Œç‚¹ ES5ã¾ã§ã¯Arrayã®ã‚ˆã†ãªãƒ“ルトインクラスをé©åˆ‡ã«ç¶™æ‰¿ã—ãŸã‚µãƒ–クラスを作るã“ã¨ãŒã§ããªã‹ã£ãŸã€‚ ES2015ã‹ã‚‰ã®ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—è¨å®šæ©Ÿèƒ½ã‚’使ã†ã¨å¯èƒ½ã§ã‚ã‚Šã€ã“ã®ã‚ˆã†ã«ãªã‚‹ã€‚ class Stack extends Array { constructor( ...args ) { var stack = new Array( ...args ) return Object.setPrototypeOf( stack, Stack.prototype ) } clear() { this.length = 0 } } ã—ã‹ã—毎回ã“ã®ã‚ˆã†ã«æ›¸ã‹ãªã„ã¨ã„ã‘ãªã„ã®ã¯ã‚¹ãƒžãƒ¼ãƒˆã§ã¯ãªã„。 ã§ãã‚Œã°ã“ã®æ§˜ã«æ›¸
New string features in ECMAScript 6
The blog post covers new features of strings in ECMAScript 6 (ES6). Unicode code point escapes  # Unicode “characters†(code points) are 21 bit long [1]. JavaScript strings are (roughly) sequences of 16 bit characters, encoded as UTF-16. Therefore, code points beyond the first 16 bits of the code point range (the Basic Multilingual Pane, BMP) are represented by two JavaScript characters. Until now
Babel · The compiler for writing next generation JavaScript
Babel is a JavaScript compiler.Use next generation JavaScript, today. Babel 7.26 is released! Please read our blog post for highlights and changelog for more details!
SBOBET Agen Judi Bola Terbesar dan Terpercaya di Indonesia 2023
ðŸ§Transfer Bank, 💶DANA, 💵Gopay, 💴Linkaja!, 💷OVO, Pulsa SBOBET Agen Judi Bola Terbesar dan Terpercaya di Indonesia 2023 Sbobet atau sbobet88 adalah nama dari sebuah provider atau pencipta jenis taruhan judi online taruhan bola, bagi anda pecinta judi bola online pastinya sudah tahu bahwa sbobet adalah tempat memasang taruhan bola terlengkap dan terpercaya. Selain menyediakan taruhan bola, sbobe
ECMAScript 6 compatibility table
V8 SpiderMonkey JavaScriptCore Chakra Carakan KJS Other ⬤ Minor difference (1 point) ⬤ Small feature (2 points) ⬤ Medium feature (4 points) ⬤ Large feature (8 points) Compilers/polyfills Desktop browsers Servers/runtimes Mobile Feature name Current browser ES6 Trans- piler Traceur Babel 6 + core-js 2 Babel 7 + core-js 2 Babel 7 + core-js 3 Closure 2020.09 Closure 2021.08 Closure 2021.09 Closure 20
ES6+カジュアルトークã§ES7ã«ã¤ã„ã¦ç™ºè¡¨ã—ã¦ããŸ
ES6+カジュアルトーク - connpass ES6+カジュアルトーク ã«å‚åŠ ã¨ç™ºè¡¨ã—ã¦ãã¾ã—ãŸã€‚ 自分ã¯æ˜Žæ—¥ã«ã¯ä½¿ãˆãªããªã‚‹ES7トークã¨ã„ã†ES7ã®è©±ã‚’ã—ã¦ãã¾ã—ãŸã€‚ 「runstant 始ã‚ã‚‹EcmaScript6 入門〠by @phi_jp EcmaScript 6 ã®ã‚µãƒ³ãƒ—ル集 | runstant runstant jsfiddleçš„ãªãƒ„ール ãƒãƒ³ã‚ºã‚ªãƒ³ let 2進数を直接書ã‘ã‚‹ Lexical grammar - JavaScript | MDN デフォルトパラメータ 引数ã«ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆå€¤ã‚’è¨å®šå‡ºæ¥ã‚‹ 分割代入 template strings ãƒãƒƒã‚¯ã‚¯ã‚ªãƒ¼ãƒˆã§ãƒ’アドã‚ュメントを書ã‘ã‚‹ class syntax 「Node.js v0.12ã§ä½¿ãˆã‚‹ã‚ˆã†ã«ãªã‚‹ES6+αã®æ©Ÿèƒ½ã€ by @yosuke_furukawa Node.js v0.12ã§ä½¿ãˆã‚‹ã‚ˆã†ã«ãªã‚‹ES6+ã®æ©Ÿ
Node.js v0.12ã§ä½¿ãˆã‚‹ã‚ˆã†ã«ãªã‚‹ES6+ã®æ©Ÿèƒ½ä¸€è¦§
ES6+カジュアルトーク資料ã§ã™ï¼ï¼
Class構文ã«ã¤ã„㦠- JS.next
æ¦‚è¦ å¾…ã¡ç„¦ãŒã‚ŒãŸäººã‚‚多ã„ã“ã¨ã ã‚ã†ã€‚ES2015ã®ä¸€ç•ªã®ç›®çŽ‰æ©Ÿèƒ½ã¨ã‚‚言ãˆã‚‹ã‚¯ãƒ©ã‚¹æ§‹æ–‡ãŒã€ã¤ã„ã«V8ã§ã‚µãƒãƒ¼ãƒˆã•ã‚ŒãŸã€‚ Class構文ã¯ã€ã€Žé–¢æ•°ï¼ˆã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ï¼‰å®šç¾©ã€ï¼‹ã€Ž.prototypeã¸ã®ãƒ¡ã‚½ãƒƒãƒ‰å®šç¾©ã€ã®ç³–衣構文ã§ã‚る。 JSã§ä»Šã¾ã§æ§˜ã€…ã«å·¥å¤«ã•ã‚Œã¦ããŸã‚¯ãƒ©ã‚¹ã®æ›¸ã方をã€ç¶ºéº—ã«çµ±ä¸€ã—ã¦ãれるå¯èƒ½æ€§ã‚’秘ã‚ã¦ã„る。 クラスを作る 従æ¥ã€Catクラスを作ã‚ã†ã¨ã—ãŸå ´åˆã“ã®ã‚ˆã†ã«æ›¸ã„ã¦ããŸã€‚ function Cat(name) { this.name = name } Cat.prototype.meow = function () { alert( this.name + 'ã¯ãƒŸãƒ£ã‚ªã¨é³´ãã¾ã—ãŸ' ) } ã—ã‹ã—ã“ã®æ›¸ãæ–¹ã ã¨ã©ã†ã—ã¦ã‚‚ã€ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã¨ãƒ¡ã‚½ãƒƒãƒ‰ã®å®šç¾©ãŒåˆ†é›¢ã•ã‚Œã¦ã„ã‚‹ãŸã‚ã€ã‚¯ãƒ©ã‚¹ã¨ã—ã¦ã¾ã¨ã¾ã‚ŠãŒãªã分ã‹ã‚Šã¥ã‚‰ãæ„Ÿã˜ã‚‹ã€‚ メソッドãŒå¢—ãˆã¦ããŸæ™‚ã‚‚ã€Cat.prototyp
ジェãƒãƒ¬ãƒ¼ã‚¿ã«ã¤ã„㦠- JS.next
æ¦‚è¦ V8ã§ã‚¸ã‚§ãƒãƒ¬ãƒ¼ã‚¿å‘¨ã‚Šã®å®Ÿè£…ãŒé€²ã‚“ã§ããŸã®ã§ã€è§£èª¬ã—ã¦ã¿ã‚ˆã†ã¨æ€ã†ã€‚ ジェãƒãƒ¬ãƒ¼ã‚¿é–¢æ•° ジェãƒãƒ¬ãƒ¼ã‚¿é–¢æ•°ã¨ã¯ã€ï¼ˆä¸€ã¤ã®è¦‹ã‹ãŸã¨ã—ã¦ã¯ï¼‰å‡¦ç†ã‚’途ä¸ã§ä¸€æ™‚åœæ¢ã§ãる関数ã®ã“ã¨ã§ã‚る。 例ãˆã°ã€å‘¼ã³å‡ºã•ã‚Œã‚‹åº¦ã«æ•°ã‚’é †ç•ªã«è¿”ã™é–¢æ•°ã‚’定義ã—ãŸã„ã¨ã™ã‚‹ã€‚ function count(n) { return function () { return n++ } } var next = count(10) next() // 10 next() // 11 next() // 12 ã“ã‚ŒãŒã‚¸ã‚§ãƒãƒ¬ãƒ¼ã‚¿é–¢æ•°ã‚’用ã„ã‚‹ã¨æ¬¡ã®ã‚ˆã†ã«æ›¸ã‘る。 function* count(n) { while (true) { yield n++ } } var gen = count(10) gen.next() // { value: 10, done: false } gen.next() // { value:
Firefox 34(Nightly)㧠String.raw ãŒå®Ÿè£…ã•ã‚ŒãŸä»¶ã¨TaggedTemplateã«ã¤ã„㦠- hogehoge @teramako
1039774 - Implement ES6 String.raw 仕様 12.3.7 Tagged Templates 21.1.2.4 String.raw TemplateLiteral ã®ç¶šã。 å‰å›žã¯ã€`(ãƒãƒƒã‚¯ã‚¯ã‚©ãƒ¼ãƒˆ) ã§ããã‚‹ã“ã¨ã§ã€ãƒ’アドã‚ュメント的ãªè¤‡æ•°è¡Œã«æ¸¡ã‚‹æ–‡å—列ã®ç”ŸæˆãŒã§ãる事ã€${expression}ã§å¼ã®åŸ‹ã‚è¾¼ã¿ãŒã§ãる事を書ã„ãŸã€‚ 実ã¯ã€func`...` ã¨ã„ã†æ§‹æ–‡ã®è¿½åŠ ã‚‚ã‚ã‚Šã€funcã‚’æ–‡å—列ã®ç´ ã¨ãªã‚‹å€¤ã‚’引数ã«å‘¼ã³å‡ºã™æ©Ÿèƒ½ã‚‚ã‚る。String.rawã¯ãã®ãŸã‚ã®ãƒ¡ã‚½ãƒƒãƒ‰ã 。func`...`ã¿ãŸã„ãªã‚³ãƒ¼ãƒ‰ã¯TaggedTemplateã¨å‘¼ã°ã‚Œã¦ã„る。 String.raw`Title: ${document.title}` // => "Title: hogehoge@teramako" // === `Titlte: ${document.tit
2014-06-09ã®JS: Bluebird 2.0.0ã€ES6ã®ãƒªãƒªãƒ¼ã‚¹ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ«ã€Nodeã§ä½œã‚‹ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ãƒ„ール
JSer.info #178 - JavaScriptã®Promise実装ライブラリã§ã‚ã‚‹Bluebirdã®2.0.0ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¾ã—ãŸã€‚ Promiseã®ãƒ©ã‚¤ãƒ–ラリ - JavaScript Promiseã®æœ¬ã§ã‚‚紹介ã—ã¦ã¾ã™ãŒã€Bluebirdã¯Q(ã“ã¡ã‚‰ã‚‚2.0開発ä¸)ã¨ä¸¦ã‚“ã§æœ‰åãªPromiseライブラリã§ã™ã€‚ progressionã¨deferredsãŒDeprecatedã«ã€Promise.usingã‚„.disposerã®è¿½åŠ ç‰è‰²ã€…ãªå¤‰æ›´ãŒå…¥ã£ã¦ã¾ã™ã€‚ ã¾ãŸPromise.castã¯éžæŽ¨å¥¨ã«ãªã‚Šã€Promise.resolveãŒåŒã˜å‹•ä½œ(ES6 Promisesã¨æŒ™å‹•ã‚’æƒãˆãŸ)ã™ã‚‹ã‚ˆã†ã«ãªã‚‹ãªã©ã€ECMAScriptã®ä»•æ§˜ã«åˆã‚ã›ãŸå¤‰æ›´ãªã©ã‚‚è¡Œã£ã¦ã„ã¾ã™ã€‚ The ECMAScript 6 schedule changes ã§ã¯ES6ã®å…¬å¼ãƒªãƒªãƒ¼ã‚¹ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ«ã®äºˆå®šå¤‰æ›´ã«ã¤ã„
Firefox 32 㧠Array.from ãŒå®Ÿè£…ã•ã‚ŒãŸ - hogehoge @teramako
904723 - Implement ES6 Array.from 22.1.2.1 Array.from ( arrayLike [ , mapfn [ , thisArg ] ] ) Array-like ãªå€¤ã‚’Arrayã«å¤‰æ›ã™ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã§ã™ã€‚ 引数㯠arrayLike: Array-likeãªã‚ªãƒ–ジェクト mapfn:(Optional) Array.prototype.map ã«æ¸¡ã™ã‚ˆã†ãª function thisArg:(Optional) åŒä¸Š Array-likeãªã‚ªãƒ–ジェクトã¨ã¯ä»¥ä¸‹ã®æ§˜ãªã‚‚ã® @@iteratorã®ã‚¤ãƒ†ãƒ¬ãƒ¼ã‚¿ã‚’æŒã¤ã‚‚ã® lengthプãƒãƒ‘ティをæŒã¤ã‚‚ã® lengthプãƒãƒ‘ティをæŒã¤ã‚‚ã®ã‚ˆã‚Šã€@@iteratorã®æ–¹ãŒå„ªå…ˆåº¦ãŒé«˜ã„ã®ã§æ³¨æ„ 使用例 æ€ã„ã¤ãã‚‚ã®ã‚’テã‚トウ㫠HTMLCollection, NodeList ã«å¯¾ã—ã¦ã€forEach, m
ECMAScript6ã«ã¤ã„ã¦es6featuresã§å¦ã‚“ã
ã¯ã˜ã‚ã« ECMAScript6ã«ã¤ã„ã¦ã®ã¯è‰²ã€…æƒ…å ±ãŒã§ã¦ãã¦ã„ã¦ã€ã¾ãŸãƒ©ã‚¤ãƒ–ラリã¨ã‹ã§ã‚‚一部採用ã—ã¦ã‚‹ã‚±ãƒ¼ã‚¹ã‚‚見られã¦ãã¾ã—ãŸã€‚ ES6 – Next Generation Javascript ES6 – episode 1 Rewriting A WebApp With ECMAScript 6 — TasteJS ç‰ãªã©ã€è‰²ã€…紹介ã—ã¦ã‚‹ã‚µã‚¤ãƒˆã¯ã‚ã‚Šã¾ã™ãŒã€ãã®ä¸ã§ã‚‚lukehoban/es6featuresã¯ã‚³ãƒ¼ãƒ‰ä¾‹ãŒè±Šå¯Œã«è¼‰ã£ã¦ã„ã¦é¢ç™½ãã†ãªã®ã§ã€å†™çµŒã—ã¦ã¿ã¾ã—ãŸã€‚ ç¾åœ¨ã®ES6ã¨ã¯ harmony:specification_drafts [ES Wiki]ã§å…¬é–‹ã•ã‚Œã¦ã‚‹ES6ã®ä»•æ§˜ã‚„ES6FeatureSet.xlsx – Microsoft Excel Web App ç‰ã‚’見るã¨APIçš„ã«å›ºã¾ã£ã¦ãã¦ã„る部分ã¯ä½•ã¨ãªã見ãˆã‚‹æ„Ÿã˜ã¯ã—ã¾ã™ã€‚ AngularJS 2.0 | A
ランã‚ング
ãŠçŸ¥ã‚‰ã›
ランã‚ング
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
Home
GitHub - babel/babel: ðŸ Babel is a compiler for writing next generation JavaScript.
{{#tags}}- {{label}}
{{/tags}}