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This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2016. Learn moreSee full compatibilityReport feedback An arrow function expression is a compact alternative to a traditional function expression, with some semantic differences and deliberate limitations in usage: Arrow functions don't have their own bindings to
Jay Phelps (@_jayphelps ) talks about why Netflix loves reactive programming with Rx. In this talk he shares the basics of RxJS 5 Observables and how they can be used with React and Redux to manage asynchronous effects using redux-observable. http://redux-observable.js.org Slides: http://www.slideshare.net/jayphelps/rxjs-redux-react-amazing
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015. * Some parts of this feature may have varying levels of support. Learn moreSee full compatibilityReport feedback The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value. To learn about the way promi
Iterators, generators and array comprehensions; The similarities between JavaScript and Python continue to increase over time and I for one could not be more excited. Today we’re going to talk about the next Pythonic proposal for ECMAScript — Decorators, by Yehuda Katz. Update 07/29/17: Decorators are advancing at TC39. The latest work on them can be found in the proposals repo. Several new exampl
JavaScript Runtime When using React Native, you're going to be running your JavaScript code in up to three environments: In most cases, React Native will use Hermes, an open-source JavaScript engine optimized for React Native. If Hermes is disabled, React Native will use JavaScriptCore, the JavaScript engine that powers Safari. Note that on iOS, JavaScriptCore does not use JIT due to the absence
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015. Learn moreSee full compatibilityReport feedback An object initializer is a comma-delimited list of zero or more pairs of property names and associated values of an object, enclosed in curly braces ({}). Objects can also be initialized using Object.create() or by
Last week, I gave a presentation by the same name as this article at Tencent Frontend Conference in Shenzhen, China. In this article, I’m adapting its transcript to a format more suitable for Pony Foo. I hope you enjoy it! What’s TC39? TC39 means Technical Committee number 39. It’s part of ECMA, the institution which standardizes the JavaScript language under the “ECMAScript” specification. The EC
This document originated from a bunch of most commonly used links and learning resources I sent to every new web developer on our full-stack web development team. What I'm doing in this document now is trying to provide the complete view angle of modern web (app or page) development ruled by JavaScript, reflect technological advance and help developers to acquire APIs, libraries, tools, services,
以前の番組表 ↓↓↓ AbemaTV 新番組表 ##大きく変わったところ チャンネルが横スクロールですべて見れるようになった サイドバーにチャンネル一覧ができた 日付切り替えがセレクトボックスからカレンダー表示になった etc. 今まではチャンネルが 5ch 毎に区切られていたので、わざわざページを切り替えて見ないといけなかったのを、横スクロールですべてのチャンネルが一覧で見られるようになりました。 さらにチャンネル毎の番組表にもアクセスしやすくなり、日付の切り替えもしやすくなったかと思います。 このリリースによって、ユーザービリティが少しでも向上していれば幸いです。 しかし、便利になった反面、このリリースに至るまでに、パフォーマンス面で様々なところで問題になりました。 今回は実際にリニューアル中に課題となった箇所と解決方法の一部を紹介します。 AbemaTV 以外であまり参考にならないか
Moment.js has been successfully used in millions of projects, and we are happy to have contributed to making date and time better on the web. As of September 2020, Moment gets over 12 million downloads per week! However, Moment was built for the previous era of the JavaScript ecosystem. The modern web looks much different these days. Moment has evolved somewhat over the years, but it has essential
2016-01-31追記 この記事を最初に書いた頃は他に何も情報がありませんでしたが、今ではよりだいぶわかりやすい資料が出揃ってきました。しっかりとしたimport/exportの仕様をもっと知りたい場合は下記を参照することを推奨します https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Statements/import http://www.slideshare.net/teppeis/effective-es6 http://uehaj.hatenablog.com/entry/2015/11/07/001848 2015/12/05追記 コメント欄より Babel v6 から Babel 公式の transform である transform-es2015-modules-commonjs を使った場合 ES
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