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RQ: Better Living Through Asynchronicity Douglas Crockford 2017-09-20 RQ is a small JavaScript library for managing asynchronicity in server applications. The source is available at https://github.com/douglascrockford/RQ. This page is available at http://RQ.crockford.com/. It is in the Public Domain. Asynchronicity Asynchronicity is becoming the preferred method for solving a large class of proble
March 8, 2015 Rapid Prototyping in JavaScript Twitter: @mattdesl In this post I’ll outline a simple workflow for quick prototyping and creative development with JavaScript. It’s the workflow I’ve been using for some years now, and it is how I build most of my libraries, demos and client projects. Some examples of libraries/projects using this workflow: Audiograph color-wander webgl-wireframes pers
JavaScript, TypeScript界隈におけるDecoratorsについて取り上げます。 JavaScriptとDecorators JavaScriptでは馴染みのなかったDecoratorsが目に触れるようになったのはAtScript発表の際だったと記憶しています。 AtScript AtScriptとは、2014年10月23日、ng-europeにて発表されたTypeScriptを包含する「新構文」です。 docs.google.com | Keynote AtScript YouTube | Miško Hevery - Keynote on AtScript at ng-europe 2014 このときの例文を引用します。 @Directive({ selector: ['[blink]'] }) class Blink { constructor(element:El
Enables cross-domain requests to any JSON API. Very useful for mashup sites - since API calls can be done client-side, no server code is needed. Note that exposing API secret keys in client code is discouraged. Easy: JSONP For APIs that support JSONP. Example using jQuery.getJSON(): https://jsonp.afeld.me/?callback=&url= Easier: Cross-domain AJAX For browsers and APIs that support CORS. Example us
Clients care deeply about web performance and they depend on us to articulate and measure how well their website is performing. If you have a service level agreement (SLA) with your client, and you should, then learning how to measure key metrics is crucial to you and your business. There are great paid products on the market that can keep track of a website's performance, but there are plenty of
At this point we're ready to start deprecating esprima-fb. We'll ship a "final" version soon with anything we have but otherwise we don't plan on integrating new JS features. Once that version is shipped, we won't be actively maintaining the project and probably won't ship bug fixes either. At Facebook we're in the process of switching our parsing and transforming to make use of Acorn and Babel. T
V8 JavaScript EngineV8 is Google's open source JavaScript engine. V8 implements ECMAScript as specified in ECMA-262. V8 is written in C++ and is used in Google Chrome, the open source browser from Google. V8 can run standalone, or can be embedded into any C++ application. V8 Project page: https://code.google.com/p/v8/ Getting the CodeCheckout depot tools, and run fetch v8 This will checkout V8 int
Recently I was prompted by Daniel Lamb to try and find old versions of jQuery for his jQuery Archive project. Thankfully I was able to find one in the Internet Archive from just a couple weeks after its release, in January 2006. I then took that opportunity to put that code online and I used the new Genius annotation beta to mark it up with a bunch of thoughts and memories around the release of th
Published 11 Apr, 2015 under Release Notes ESLint 0.19.0 released We just pushed ESLint 0.19.0, which is a minor release upgrade. This release includes new features and bug fixes. Highlights This is a summary of the major changes you need to know about for this version of ESLint. More ECMAScript 6 fixes This release addresses the root cause of several issues related to ECMAScript 6 features. We pr
2015/4/16(木):ページの一番下に追記を記述しました。 その昔、なんとかキャンプというセキュリティのイベントに参加した時「アウトプットが大事」と言われたのを思い出しました。 でも、普通自分の見つけた知識は後生大事に抱えておきたいもんだと思います。 そこで今回はそういった何かしょーもないものを捨てるべく、溜め込んだ色んなXSSのPoCを少し書き出してまとめました。 今まで自分で見つけたものや海外のSecurity Researcher達から収集したものもあります。 さて、今回リストアップしたPoCの見方ですがいくつかの項目があります。 一番上の「手法」はタイトルみたいなものだと思って下さい。 二番目の「PoC」はスクリプトを実行する為のコードです。殆どがアラートが出るだけのスクリプトの為危険なコードは無いつもりですがご自分のブラウザで実行する際は自己責任でお願いします。リンクをクリッ
2015-03-03 の一連のツイートがこちら performance.now() iOS 8.0 で追加されて、iOS 8.1 で削除されてた— コラーゲンたっぷりさん (@uupaa) 2015, 3月 3 正しくは、「iOS 8.1.1 で」ですね performance.now() 削除されてたのソース。 WebKit のとこ https://t.co/gvpnz9Wwk2— コラーゲンたっぷりさん (@uupaa) 2015, 3月 3 performance.now()の無効化が何故痛いかというと、Date.nowは相当重い部類のAPIという認識なのでアニメーション中には一回も呼びたくないしTimer系を呼ばないように組み上げると速くなる。 その辺の事情を知らない人はバンバン呼んでるけど、あれはよろしくないです— コラーゲンたっぷりさん (@uupaa) 2015, 3月 3
Timer APIs(Date.getTime, Date.now, performance.now, setTimeout, setInterval, requestAnimationFrame, setImmediate) with Canvas AnimationanimationcanvasrequestAnimationFrameDate.nowperformance.now このエントリでは、「ブラウザ上で Canvas アニメーションを効率的に動かすコードを書こうとした場合に、どういった API を利用すれば良いか?」をテーマに、Timer API について説明します。 このエントリに登場する Time API は、Date.getTime, Date.now, performance.now, setTimeout, setInterval, requestAnimatio
One of the most important parts of a game engine is the so called “game loop”. It is the central piece of the game’s engine and is responsible for trying to balance running a game’s logic, and executing its drawing operations. A very basic game loop would look something like this in JavaScript (this does not work in Browsers!): var Game = { }; Game.draw = function() { ... draw entities here ... };
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