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Why Javascript Development is Crazy
Published 04/11/16 by sean Follow @sfioritto Grunt/Gulp npm, require.js, browserify, es6, compilers, transpilers, jasmine mocha chai, react/angular/ember, closures, prototypes. *head explodes* Web development is fun! Javascript is ... daunting. Everything else in web development clicks for you, but when you dig into Javascript it's like you're missing some big, foundational piece of knowledge that
Our Justified Layout Goes Open Source | code.flickr.com
We introduced the justified layout on Flickr.com late in 2011. Our community of photographers loved it for its ability to efficiently display many photos at their native aspect ratio with visually pleasing, consistent whitespace, so we quickly added it to the rest of the website. It’s been through many iterations and optimizations. From back when we were primarily on the PHP stack to our lovely ne
Tracking unhandled rejected Promises
In Promise-based asynchronous code, rejections are used for error handling. One risk is that rejections may get lost, leading to silent failures. For example: function main() { asyncFunc() .then(···) .then(() => console.log('Done!')); } If asyncFunc() rejects the Promise it returns then that rejection will never be handled anywhere. Let’s look at how you can track unhandled rejections in browsers
Leveling Up with React: Redux | CSS-Tricks
This tutorial is the final of a three-part series by Brad Westfall. We’ll learn how to manage state across an entire application efficiently and in a way that can scale without dangerous complexity. We’ve come so far in our React journey, it’s worth making it across the finish line here and getting the full bang-for-our-buck out of this development approach. Redux is a tool for managing both data-
Masato Kinugawa Security Blog: TinyMCE 4.3.9で修正されたXSS
2月頃、リッチテキストエディタの TinyMCE のXSS脆弱性を報告しました。 特にセキュリティの修正をしたといったアナウンスはありませんが、数日前に公開された4.3.9でこの問題が修正されています。Twitterのプロフィールにも、「World's #1 most popular open source #WYSIWYG editor」 とあるくらい、世界的にも非常によく使われているリッチテキストエディタのようですので、更新を促すためにこの記事を書きます。 XSS脆弱性は 4.3.8 以下のバージョンにあります。 僕の知る限りでは、TinyMCEのPreview Plugin機能を使っていなければ影響を受けません。 この機能を呼び出さないようにするか、4.3.9以上に更新してください。 これ以下は、技術的な説明になります。この脆弱性の発生原因は、技術的にも少し面白いです。 発火する場所
ESLint v2.8.0 released - ESLint - Pluggable JavaScript Linter
Published 15 Apr, 2016 under Release Notes ESLint v2.8.0 released We just pushed ESLint v2.8.0, which is a minor release upgrade of ESLint. This release adds some new features and fixes several bugs found in the previous release. Enhancements 76913b6 Update: Add metadata to existing rules - Batch 3 (refs #5417) (Vitor Balocco) fb3c2eb Update: allow template literals (fixes #5234) (Jonathan Haines)
JavaScript’s new IntersectionObserver
The new IntersectionObserver landed in Chromium about a week ago. I find it pretty awesome and wanted to do a quick run down on it. This new API eliminates a lot of the headaches where you would have to do things like poll the page to determine when a element is visible. For example, I have a tab that is not selected and it contains some widget that needs to size itself. I hacked around it like th
javascript - Pros/cons of using redux-saga with ES6 generators vs redux-thunk with ES2017 async/await - Stack Overflow
There is a lot of talk about the latest kid in redux town right now, redux-saga/redux-saga. It uses generator functions for listening to/dispatching actions. Before I wrap my head around it, I would like to know the pros/cons of using redux-saga instead of the approach below where I'm using redux-thunk with async/await. A component might look like this, dispatch actions like usual. import { login
power-assert + babel as a development tool
3行まとめ espower-babelは役目を終えたので、Deprecated Babel + power-assertはbabel-preset-power-assertを使う コード上はrequire("power-assert")とrequire("assert") どちらでもpower-assert化できるようになった espower-babelは非推奨へ Babel + Mocha + power-assertの組み合わせを出来るだけ設定ファイルなどを作らずに使えるespower-babelというモジュールを書いていましたが、役目を終えたので非推奨(deprecated)にしました。 テストコードをES6+power-assertで書けるespower-babel 3.0.0リリース | Web Scratch 理由としては、Babel@6からは設定(ファイル)を必ず必要とするの
Immutability is not enough
Patrick Dubroy Immutable data structures – also known as persistent or purely functional data structures – are a key part of modern functional programming. Once created, immutable data structures cannot be modified. Instead, they support operations which efficiently produce a new copy of the structure with the desired changes applied. As I’ve gotten more experience working with immutable data stru
Welcoming JSCS To ESLint - ESLint - Pluggable JavaScript Linter
Published 14 Apr, 2016 under Announcements Welcoming JSCS To ESLint We are happy to announce that, effectively immediately, the JSCS team is now part of the ESLint team. We would like to invite everyone to welcome Marat Dulin, Oleg Gaidarenko, Mike Sherov, Alexej Yaroshevich, and Henry Zhu, and we're looking forward to working with them all. ESLint and JSCS started out at roughly the same time, ju
Release 3.0.0 · jscs-dev/node-jscs
Version 3.0.0 (2016-04-14): Hell yeah! 3.0 is here. First and foremost we rewrote every... single... rule. We fixed a plentiful amount of bugs (most of which were found during refactoring those rules using CST). This provides us the opportunity to include autofix for complicated rules like the brand new disallowUnusedVariables rule (see below). Breaking Changes If you aren't a plugin writer or sup
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GitHub - WICG/EventListenerOptions: An extension to the DOM event pattern to allow authors to disable support for preventDefault
GitHub - davidmerfield/randomColor: A tiny script for generating attractive colors
GitHub - 59naga/assert-exception: an assert exception functions (throws / rejects)
クリエイティブコーディングのための数学 JavaScript 入門 [三角関数と行列]![クリエイティブコーディングのための数学 JavaScript 入門 [三角関数と行列]](https://cdn-ak-scissors.b.st-hatena.com/image/square/5e3693bd830061845cb4d0fceb12958432fa1f9f/backend=imagemagick;height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Fjavascript-160107112551-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)
Add IntersectionObserver polyfill by surma · Pull Request #116 · w3c/IntersectionObserver
JSCS, CST и новое начало