React + FLUX + Redux + Redux Saga のお話ARCANA Meetup #23 の「React + FLUX + Redux + Redux Saga のお話」 のスライドです。 http://www.s-arcana.co.jp/blog/2017/04/06/3627
Retiring Octane · V8
The history of JavaScript benchmarks is a story of constant evolution. As the web expanded from simple documents to dynamic client-side applications, new JavaScript benchmarks were created to measure workloads that became important for new use cases. This constant change has given individual benchmarks finite lifespans. As web browser and virtual machine (VM) implementations begin to over-optimize
Intercepting new Image().src requests
Maybe you're an attacker who sneaked in a little JavaScript to an unsuspecting site and would like to, well, sneak. Or maybe you want to know what exactly all these third-party analytics scripts are "calling home". Or maybe just for fun - wouldn't it be cool to intercept and log all requests made with new Image().src It's a common pattern. A ping. Collect all the data then send it like: new Image(
thisは呼び出しコンテクスト（invocation context)と呼ぶのが正しい。（読書メモ） - Qiita
目下、とある業務にフロントエンジニアとして関わっており、日々、ReactやらReduxやらにお世話になっており、こういうトンデモなく便利で強力なものを使えば使うほど、基礎力強化の必要性を感じている今日この頃。 そこで、「開眼！JavaScript」を読了したら、その次に読むといいらしい[「JavaScript Ninjaの極意」] (https://www.amazon.co.jp/dp/4798128457)を読みはじめ、さっそく覚えておきたい箇所があったのでメモ。 以下、同著 3-3 関数の呼び出し P.52 からの引用 this パラメータが指し示すものは、実際には（Javaのように)その関数が宣言された方法によって定義されるのではなく、その関数が呼び出された方法によって定義される。だから thisは **呼び出しコンテクスト（invocation context)**と呼ぶのが正し
Fixing JavaScript Date – Web Compatibility and Reality
In my previous post, I discussed things that could be fixed in JavaScript’s date implementation – if we wanted to. In this post, I’ll discuss things that can’t be fixed – no matter how much we want them to be. No Semantic Versioning Here! Most developers are familiar with Semantic versioning, or semver. In semver, we have the idea of three kinds of release: Patch – releases that fix bugs only Mino
Releasing Prettier 1.0
This post was written by vjeux and edited by jlongster. We officially announced prettier over two months ago as a way to solve the problem of wasting time formatting your code. It started as an experiment but it clearly resonated with a lot of people, amassing ~7000 GitHub stars and over 100,000 monthly npm downloads in just two months. In case you don't know, prettier is a JavaScript formatter th
Webには時代遅れで脆弱性のあるJavaScirptライブラリで溢れていることが研究により明らかに
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Why you shouldn’t use ‘in’ in javascript
How it worksthe in operator returns true if the specified property is in the specified object. source: MDN So? .. it checks if property exists not the value of it. then what can go wrong ? WhyI always had something against in, mainly because it sounds a bit over promising. The first time I used it I was expecting a behavior more like includes, just because the word “in” is very suggestive to infor
Immutability vs Encapsulation in Angular Applications
Victor Savkin is a co-founder of nrwl.io, providing Angular consulting to enterprise teams. He was previously on the Angular core team at Google, and built the dependency injection, change detection, forms, and router modules. Using mutable objects for modeling application state makes tracking changes hard and incurs a sizable performance cost. Switching to immutable objects solves these problems,
Webpack and Rollup: the same but different
This week, Facebook merged a monster pull request into React that replaced its existing build process with one based on Rollup, prompting several people to ask ‘why did you choose Rollup over webpack’? Which is a completely reasonable question. Webpack is one of the modern JavaScript community’s greatest success stories, with millions of downloads every month powering tens of thousands of websites
Introducing Moon | HackerNoon
I’ve been using Vue for a while now, it solves all my problems, and does it beautifully. After a while, in late 2015, I began to notice some performance issues with my application. So I began to create something new, as a learning project. Hopefully to see how this DOM stuff actually works, and write a solution specifically for me.
Glimmer
Fast and light-weight UI components for the web Available for use within Ember.js and standalone apps. Use in Ember.js: Install Glimmer packages in your Ember app: npm install --dev @glimmer/component @glimmer/tracking Generate a Glimmer Component ember generate my-component -gc See the Ember Octane Guides to learn more! Standalone Glimmer App: Please note this is experimental Install the Ember bu
EmberConf 2017: State of the Union
Ember.js (or should we say Amber.js) turned five years old last December. In some ways, five years is a short amount of time. But when measured in web framework years, it feels like a downright eternity. As Yehuda and I were getting ready for our keynote presentation at this year's EmberConf, we tried to remember what developing web apps was really like in 2011. We knew that the web had changed fo
Release Notes for Safari Technology Preview 27
Safari Technology Preview Release 27 is now available for download for macOS Sierra. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers WebKit revisions 213822-214535. Browser Changes Added a “Reload Page From Origin” alternate menu item to the View menu. This action reloads a page without using cached resources. Remove
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GitHub - nettofarah/json-crate: 📦 json-crate: a minimalistic promise-based json database
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GitHub - lencioni/consolidated-events: Manage multiple event handlers using few event listeners
GitHub - nfroidure/jsarch: A simple module to extract architecture notes from your code.
Release Version 3.0.0 · sweet-js/sweet-core
Release 8.0.0 · preactjs/preact