[B! javascript] meganiiã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

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javascriptã«é–¢ã™ã‚‹meganiiã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (44)

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ECMAScript 2015ä»¥é™ã®JavaScriptã®`this`ã‚’ç†è§£ã™ã‚‹
ã“ã®è¨˜äº‹ã¯JavaScriptã®å…¥é–€æ›¸ã¨ã—ã¦æ›¸ã„ã¦ã„ã‚‹js-primerã®thisã«é–¢ã™ã‚‹éƒ¨åˆ†ã‚’ãƒ™ãƒ¼ã‚¹ã«ã—ã¦ã„ã¾ã™ã€‚ ã¾ãŸjs-primerã§ã¯æ›¸ã‘ãªã‹ã£ãŸç¾åœ¨æ™‚ç‚¹(2018å¹´1æœˆ1æ—¥)ã§ã®ãƒ–ãƒ©ã‚¦ã‚¶ã®æŒ™å‹•ã«ã¤ã„ã¦ã‚’åŠ ãˆãŸã‚‚ã®ã§ã™ã€‚ æ¬¡ã®å ´æ‰€ã«js-primerç‰ˆï¼ˆæ›¸ç±ç‰ˆï¼‰ã®thisã«ã¤ã„ã¦ã®è§£èª¬ãŒã‚ã‚Šã¾ã™ã€‚ ã“ã®è¨˜äº‹ã¨é•ã£ã¦å®Ÿéš›ã«ã‚³ãƒ¼ãƒ‰ã‚’å®Ÿè¡Œã—ãªãŒã‚‰èªã‚ã‚‹ã®ã§ã€å¦ç¿’ã‚½ãƒ¼ã‚¹ã¨ã—ã¦ã¯æ›¸ç±ç‰ˆã‚’æŽ¨å¥¨ã—ã¾ã™ã€‚ æ›¸ç±ç‰ˆ: é–¢æ•°ã¨this Â· JavaScriptã®å…¥é–€æ›¸ #jsprimer ã¾ãŸã€ãƒã‚°å ±å‘Šã‚„PRã‚‚ç›´æŽ¥ãƒªãƒã‚¸ãƒˆãƒªã«ã—ã¦å•é¡Œã‚ã‚Šã¾ã›ã‚“ã€‚ asciidwango/js-primer: JavaScriptã®å…¥é–€æ›¸ ãŠã‹ã—ã„å ´æ‰€ã‚’é¸æŠžã—ãŸçŠ¶æ…‹ã§å³ä¸‹ã«ã‚ã‚‹â€Bug Reportâ€ãƒœã‚¿ãƒ³ã‚’æŠ¼ã›ã°ã€ç°¡å˜ã«typoã¨ã‹ã®ãƒã‚°ã‚’å ±å‘Šã§ãã¾ã™ã€‚(PRã§ã‚‚æ“è¿Ž) å‰ç½®ãã¯ã“ã®è¾ºã¾ã§ã§ã€ã“ã“ã‹ã‚‰æœ¬ç·¨ã€‚ ã“ã®è¨˜
meganii 2018/01/05
javascript

ECMAScript
ãƒªãƒ³ã‚¯
SPAã§ã‚ã‚‹ä¾¡å€¤ - nobkzã®ãƒ–ãƒã‚°
ä»¥å‰ã€å°‘ã—å‰ã ãŒã€ä»¥ä¸‹ã®ãƒ–ãƒã‚°ã‚’èªã‚“ã§ã€SPAã§ã‚ã‚‹ã¹ãä¾¡å€¤ã«ã¤ã„ã¦è€ƒãˆãŸã“ã¨ã‚’è¿°ã¹ã‚‹ã€‚ anond.hatelabo.jp mizchi.hatena blog.com ãã‚‚ãã‚‚SPAã¨ã¯? ã“ã®è°è«–ã‚’ã™ã‚‹å‰ã«ã€ãã‚‚ãã‚‚SPAã¨ã¯ä½•ã ã‚ã†ã‹?ã¨ã„ã†ç‚¹ã«ã¤ã„ã¦æ•´ç†ã—ã¦ãŠã“ã†ã€‚åƒ•ã¯2ã¤ã®ç‚¹ã§ç‰¹å¾´ãŒã‚ã‚‹ã¨æ€ã£ã¦ã„ã¦ã€ ãƒ•ãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰GUIã§ã‚ã‚‹ã“ã¨ Webã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã§ã‚ã‚‹ã“ã¨ ã“ã®2ç‚¹ã‹ãªã¨æ€ã†ã€ç°¡å˜ã«ã¾ã¨ã‚ã‚‹ã¨ã€ ãƒ•ãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰GUIã§ã‚ã‚‹ã“ã¨ ã¾ãšã¯ã€ã€Œãƒ•ãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰GUIã€ã¨ã„ã†ã®ã¯ã©ã†ã„ã†ã“ã¨ã‹ã¨è¨€ãˆã°ã€ã‚µãƒ¼ãƒãƒ¼ã‚µã‚¤ãƒ‰ãƒ¬ãƒ³ãƒ€ãƒªãƒ³ã‚°ã¨ã¯å¯¾ç…§ã«ã€jsã«ã‚ˆã‚‹DOMæ“ä½œã«ã‚ˆã£ã¦ã€UIã‚’åˆ‡ã‚Šæ›¿ãˆã¦è¡Œã£ã¦æ§‹æˆã™ã‚‹GUIã‚’æŒ‡ã™ã€‚ Webã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã§ã‚ã‚‹ã“ã¨ GUIã§ã¯ã‚ã‚‹ã®ã ãŒã€ãã‚Œã¯ã€Webã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã§ã‚‚ã‚ã‚‹ã€‚ã‚µãƒ¼ãƒãƒ¼ã‹ã‚‰Ajaxã‚„websocketãªã©ã«ã‚ˆã£ã¦ã€ã‚µãƒ¼ãƒã¨ãƒ‡ãƒ¼ã‚¿ã®ã‚„
meganii 2017/11/05
SPA

javascript
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Common Async/Await Design Patterns in Node.js
Async/await in Node.js opens up a host of powerful design patterns. Tasks that used to take complex libraries or intricate promise chaining can now be done with rudimentary if statements and for loops. I already wrote about these kind of design patterns with co, but async/await makes these patterns accessible in vanilla Node.js, no outside libraries required. Retrying Failed Requests The power of
meganii 2017/10/08
JavaScript
ãƒªãƒ³ã‚¯
Find a DOM element's X and Y position (and width/height) using JavaScript
Find a DOM element's X and Y position (and width/height) using JavaScript By Steve Claridge on 2015-10-22. There are a number of different ways to find the X and Y position of a DOM element in a web page but the getBoundingClientRect() is the best (and simplest) in my opinion, it is also cross-browser and supported in IE since version 9. Here's an example where we get the X/Y position of element #
meganii 2017/09/24
javascript
ãƒªãƒ³ã‚¯
Functional Mixins
Smoke Art Cubes to Smoke â€” MattysFlicks â€” (CC BY 2.0)Note: This is part of the â€œComposing Softwareâ€ series (now a book!) on learning functional programming and compositional software techniques in JavaScript ES6+ from the ground up. Stay tuned. Thereâ€™s a lot more of this to come! < Previous | << Start over at Part 1 | Next > Functional mixins are composable factory functions which connect together
meganii 2017/09/24
javascript
ãƒªãƒ³ã‚¯
JavaScript Modules: A Beginnerâ€™s Guide
By Preethi Kasireddy If youâ€™re a newcomer to JavaScript, jargon like â€œmodule bundlers vs. module loaders,â€ â€œWebpack vs. Browserifyâ€ and â€œAMD vs. CommonJSâ€ can quickly become overwhelming. The JavaScript module system may be intimidating, but understanding it is vital for web developers. In this post, Iâ€™ll unpack these buzzwords for you in plain English (and a few code samples). I hope you find it
meganii 2017/09/24
javascript
ãƒªãƒ³ã‚¯
GitHub - ryanmcdermott/clean-code-javascript: :bathtub: Clean Code concepts adapted for JavaScript
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meganii 2017/09/19
javascript
ãƒªãƒ³ã‚¯
expresså®Ÿè·µå…¥é–€
index.md expresså®Ÿè·µå…¥é–€ è‡ªå·±ç´¹ä»‹ å°å·å…… mitsuruog ãƒ•ãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ Javascript, HTML, CSS, Node.js, APIè¨è¨ˆã¨ã‹èªè¨¼ã¨ã‹ 2015/5æœˆå…¥ç¤¾(ç´„åŠå¹´) ã¯ã˜ã‚ã« ã‚ãã¾ã§ã€Œä¿ºãŒè€ƒãˆã‚‹æœ€å¼·ã®expresså®Ÿè·µå…¥é–€ã€ã§ã™ã€‚ åˆå¦è€…ãŒexpressã‚’æ”»ç•¥ã™ã‚‹ä¸Šã§ã®ã¤ã¾ã¥ããƒã‚¤ãƒ³ãƒˆã¨ã€ä¸è¦æ¨¡é–‹ç™ºã‚’ã‚¿ãƒ¼ã‚²ãƒƒãƒˆã«ã—ãŸãƒ™ã‚¹ãƒˆãƒ—ãƒ©ã‚¯ãƒ†ã‚£ã‚¹ã‚’çµŒé¨“ãƒ™ãƒ¼ã‚¹ã§ãŠè©±ã—ã¾ã™ã€‚ ãŠãã‚‰ãã€åˆã€œä¸ç´šè€…å‘ã‘ã®å†…å®¹ã§ã™ã€‚ æœ¬ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã®ä½¿ã„æ–¹ expressåˆå¿ƒè€… åˆå¦è€…å‘ã‘ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ«(dotinstallã¨ã‹)ã®ã‚ã¨ã« expressçµŒé¨“è€… ã”è‡ªèº«ã®ã‚³ãƒ¼ãƒ‰ã®è¦‹ç›´ã—ã« ä»–ã®è¨€èªžã®çµŒé¨“è€… ä»–ã®è¨€èªžã®ã€Œã‚ã‚Œã€ã¯ã€node.jsã§ã¯ã€Œã“ã‚Œã€ã®ãƒžãƒƒãƒ”ãƒ³ã‚°ã« (â€»)ä¸ã§ç´¹ä»‹ã™ã‚‹ã‚³ãƒ¼ãƒ‰ã¯æŠœç²‹ã—ãŸã‚‚ã®ã§ã‚ã‚Šã€ãã®ã¾ã¾ã§ã¯å‹•ä½œã—ãªã„å ´åˆãŒã‚ã‚Šã¾ã™ã€‚ã”æ³¨æ„ãã ã•ã„ã€‚
meganii 2017/09/02
javascript

express
ãƒªãƒ³ã‚¯
Universal JavaScript
In the beginning, there was Netscape. And Netscape wanted to run Scheme in Netscape Navigator. So they hired Brendan Eich to work on it. But then they changed their minds and decided they wanted Java instead. And lo, JavaScript was born. And it was good (enough). Some years later, Ryan Dahl had this crazy idea to pair Googleâ€™s V8 JavaScript runtime with libev so developers would have a way to run
meganii 2017/08/06
ã¡ã‚‡ã£ã¨å¤ã„ã‘ã©ã€‚åå‰é‡è¦ã€‚Isomorphic JavaScriptã¨Universal JavaScript

javascript
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ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’ES2015(ES6)ã§æ›¸ã„ã¦å…¬é–‹ã™ã‚‹æ‰€ã‹ã‚‰å§‹ã‚ã‚ˆã†
ã“ã®è¨˜äº‹ã¯ECMAScript 2015ã®äº‹å§‹ã‚ã¨ã—ã¦ã€ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’ECMAScript 2015ã§æ›¸ã„ã¦å…¬é–‹ã™ã‚‹ã¨ã„ã†ã¨ã“ã‚ã‹ã‚‰å§‹ã‚ã‚‹ã®ãŒã„ã„ã®ã§ã¯ã¨ã„ã†å†…å®¹ã§ã™ã€‚ ECMAScript 2015(ES2015)ã¯ES6ã¨ã‚‚å‘¼ã°ã‚Œã¦ã„ã¦ã©ã¡ã‚‰ã‚‚åŒã˜ã‚‚ã®ã‚’æŒ‡ã—ã¾ã™ãŒã€ã“ã®è¨˜äº‹ã§ã¯ES2015ã«çµ±ä¸€ã—ã¾ã™ã€‚ ECMAScriptã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã«ã¤ã„ã¦ã¯æ¬¡ã®ãƒšãƒ¼ã‚¸ã‚’å‚ç…§ã—ã¦ãã ã•ã„ã€‚ ECMAScript Â· JavaScriptã®å…¥é–€æ›¸ #jsprimer 2018-12-27: è¿½è¨˜ textlint/textlint-rule-helperã®masterã¯TypeScriptã®å®Ÿè£…ã¸å¤‰æ›ã•ã‚Œã¦ã„ã¾ã™ã€‚ Babelã®å®Ÿè£…ã¯https://github.com/textlint/textlint-rule-helper/tree/2.0.1ã‹ã‚‰å‚ç…§ã§ãã¾ã™ Babel ã‹ã‚‰ TypeScrip
meganii 2016/08/20
javascript

ES6
ãƒªãƒ³ã‚¯
power-assert + babel as a development tool
3è¡Œã¾ã¨ã‚ espower-babelã¯å½¹ç›®ã‚’çµ‚ãˆãŸã®ã§ã€Deprecated Babel + power-assertã¯babel-preset-power-assertã‚’ä½¿ã† ã‚³ãƒ¼ãƒ‰ä¸Šã¯require("power-assert")ã¨require("assert") ã©ã¡ã‚‰ã§ã‚‚power-assertåŒ–ã§ãã‚‹ã‚ˆã†ã«ãªã£ãŸ espower-babelã¯éžæŽ¨å¥¨ã¸ Babel + Mocha + power-assertã®çµ„ã¿åˆã‚ã›ã‚’å‡ºæ¥ã‚‹ã ã‘è¨å®šãƒ•ã‚¡ã‚¤ãƒ«ãªã©ã‚’ä½œã‚‰ãšã«ä½¿ãˆã‚‹espower-babelã¨ã„ã†ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚’æ›¸ã„ã¦ã„ã¾ã—ãŸãŒã€å½¹ç›®ã‚’çµ‚ãˆãŸã®ã§éžæŽ¨å¥¨(deprecated)ã«ã—ã¾ã—ãŸã€‚ ãƒ†ã‚¹ãƒˆã‚³ãƒ¼ãƒ‰ã‚’ES6+power-assertã§æ›¸ã‘ã‚‹espower-babel 3.0.0ãƒªãƒªãƒ¼ã‚¹ | Web Scratch ç†ç”±ã¨ã—ã¦ã¯ã€Babel@6ã‹ã‚‰ã¯è¨å®š(ãƒ•ã‚¡ã‚¤ãƒ«)ã‚’å¿…ãšå¿…è¦ã¨ã™ã‚‹ã®
meganii 2016/08/20
babel

javascript
ãƒªãƒ³ã‚¯
Node.jsã®ã‚¤ãƒ™ãƒ³ãƒˆãƒ«ãƒ¼ãƒ—ã‚’ç†è§£ã™ã‚‹ | POSTD
(è¨³æ³¨ï¼š2015/8/4ã€ã„ãŸã ã„ãŸç¿»è¨³ãƒ•ã‚£ãƒ¼ãƒ‰ãƒãƒƒã‚¯ã‚’å…ƒã«è¨˜äº‹ã‚’ä¿®æ£ã„ãŸã—ã¾ã—ãŸã€‚) Nodeã®â€ã‚¤ãƒ™ãƒ³ãƒˆãƒ«ãƒ¼ãƒ—â€ã¯é«˜ã‚¹ãƒ«ãƒ¼ãƒ—ãƒƒãƒˆã®ã‚·ãƒŠãƒªã‚ªã‚’æ“ä½œã™ã‚‹ä¸æž¢ã§ã€ãƒ¦ãƒ‹ã‚³ãƒ¼ãƒ³ã‚„è™¹ã§æº€ã¡ã‚ãµã‚Œã¦ã„ã‚‹ã‚ˆã†ãªé…åŠ›çš„ãªå ´æ‰€ã§ã™ã€‚ãã—ã¦ã“ã®ã‚¤ãƒ™ãƒ³ãƒˆãƒ«ãƒ¼ãƒ—ã®ãŸã‚ã€ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ã§ä»»æ„ã®å‡¦ç†ã®å®Ÿè¡ŒãŒå¯èƒ½ã§ã‚ã‚ŠãªãŒã‚‰ã€Nodeã¯æœ¬è³ªçš„ã«â€ã‚·ãƒ³ã‚°ãƒ«ã‚¹ãƒ¬ãƒƒãƒ‰â€ã«ãªã‚‹ã®ã§ã™ã€‚ã“ã®è¨˜äº‹ã§ã¯ã€ã‚¤ãƒ™ãƒ³ãƒˆãƒ«ãƒ¼ãƒ—ãŒã©ã®ã‚ˆã†ãªå‡¦ç†ã‚’è¡Œã†ã®ã‹ã‚’èª¬æ˜Žã—ã¦ã„ãã¾ã™ã€‚ãã†ã™ã‚Œã°çš†ã•ã‚“ã‚‚ã€ã“ã®é”æ³•ã‚’ä½¿ã„ã“ãªã›ã‚‹ã‚ˆã†ã«ãªã‚‹ã§ã—ã‚‡ã†ã€‚ ã‚¤ãƒ™ãƒ³ãƒˆé§†å‹•åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° ã‚¤ãƒ™ãƒ³ãƒˆãƒ«ãƒ¼ãƒ—ã‚’ç†è§£ã™ã‚‹ãŸã‚ã«ã¾ãšå¿…è¦ãªã®ã¯ã€ã‚¤ãƒ™ãƒ³ãƒˆé§†å‹•åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®ãƒ‘ãƒ©ãƒ€ã‚¤ãƒ ã‚’ç†è§£ã™ã‚‹ã“ã¨ã§ã™ã€‚ã‚¤ãƒ™ãƒ³ãƒˆé§†å‹•åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã¯ã€1960å¹´ä»£ã‹ã‚‰åºƒãçŸ¥ã‚‰ã‚Œã¦ãã¾ã—ãŸã€‚ç¾åœ¨ã¯ä¸»ã«UIã®ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã«ä½¿ç”¨ã•ã‚Œã¦ã„ã¾ã™ã€‚JavaScriptã§ã¯ä¸»ã«DOMã¨ã®ã‚„ã‚Šã¨ã‚Šã§åˆ©
meganii 2016/02/16
eventemitterã¨ã¯ãªã«ã‹

node

JavaScript
ãƒªãƒ³ã‚¯
JSONã¨JSONPã®é•ã„ - ã‚ã¨å‘³
è§£èª¬ã¯ä»–ã«ã‚‚ãŸãã•ã‚“ã‚ã‚Šã¾ã™ãŒã€ç§è‡ªèº«ã‚‚ä½¿ã„ã¯ã˜ã‚ã®é ƒã€é•ã„ãŒã‚ˆãã‚ã‹ã‚‰ãªã‹ã£ãŸã®ã§ã€‚ JSONã¨ã¯ï¼Ÿ æ±Žç”¨çš„ãªãƒ‡ãƒ¼ã‚¿è¨˜è¿°æ–¹æ³•ã§ã™ã€‚ã“ã‚“ãªæ„Ÿã˜ã§æ›¸ãã¾ã™ã€‚ { 'blog' : 'ã‚ã¨å‘³', 'author' : 'jdg' } ã¾ã•ã«JavaScriptã®ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã§ã™ãã€‚*1 JSONPã¨ã¯ï¼Ÿ JSONã‚’ä»¥ä¸‹ã®ã‚ˆã†ã«å¤‰ãˆãŸã‚‚ã®ã€‚ callback({ 'blog' : 'ã‚ã¨å‘³', 'author' : 'jdg' }); é–¢æ•°å‘¼ã³å‡ºã—ã£ã½ã„ã§ã™ãã€‚ã¾ãã€é–¢æ•°å‘¼ã³å‡ºã—ãªã‚“ã§ã™ã‘ã©ã€‚ ã©ã‚†ã“ã¨ï¼Ÿã¨ãªã‚‹ãƒã‚¤ãƒ³ãƒˆ è¦‹ãŸç›®ãŒé–¢æ•°ã£ã½ããªã‚‹æ„å¤–ã«å¤‰æ›´ç‚¹ã¯ãªã„ã‚ˆã†ã«è¦‹ãˆã¾ã™ãŒã€ã‚¯ãƒã‚¹ãƒ‰ãƒ¡ã‚¤ãƒ³ã§JSONã‚’èªã¿è¾¼ã‚€æ™‚ã¯ã€ãªãœã‹JSONã§ã¯ãªãã€JSONPãŒä½¿ã‚ã‚Œã¾ã™ã€‚ï¼ˆWebAPIç‰ï¼‰ ã¾ãŸã€ã‚¢ã‚¯ã‚»ã‚¹ã—ãŸã‚‰JSONå½¢å¼ã®ãƒ‡ãƒ¼ã‚¿ã‚’è¿”ã™å˜ç´”ãªCGIã‚’è‡ªåˆ†ã§ä½œã‚ŠãŸã„ã¨æ€ã£ãŸå ´åˆã§ã‚‚ã€JSONã‚’è¿”ã—ã¦ã‚‚ã€J
meganii 2016/02/14
jsonp

javascript
ãƒªãƒ³ã‚¯
ãƒ†ã‚™ãƒ¼ã‚¿å¯è¦–åŒ–å‹‰å¼·ä¼š
10. èªçŸ¥æ©Ÿèƒ½ãƒ»çµŒé¨“ã‚’ãƒ•ãƒ«ã«ä½¿ã† # Sepal.Lengt Sepal.Widt Petal.Lengt Petal.Width Species 1 5.1 3.5 1.4 0.2 setosa 2 4.9 3.0 1.4 0.2 setosa 3 4.7 3.2 1.3 0.2 setosa 4 4.6 3.1 1.5 0.2 setosa 5 5.0 3.6 1.4 0.2 setosa 51 7.0 3.2 4.7 1.4 versicolor 52 6.4 3.2 4.5 1.5 versicolor 53 6.9 3.1 4.9 1.5 versicolor 54 5.5 2.3 4.0 1.3 versicolor 55 6.5 2.8 4.6 1.5 versicolor 101 6.3 3.3 6.0 2.5 virginica 102 5.8 2.7 5.1 1.9
meganii 2016/02/07
å¯è¦–åŒ–

JavaScript

D3
ãƒªãƒ³ã‚¯
Reactã¨Fluxã®ã“ã¨ // Speaker Deck
http://inside.pixiv.net/entry/2015/04/27/170944
meganii 2016/01/23
èªã‚“ã§ã‚‹

javascript
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