Using inline JavaScript modules to prevent CSS blockage
Stoyan (@stoyanstefanov) is a former Facebook and Yahoo! engineer, writer ("JavaScript Patterns", "React: Up and Running"), speaker (JSConf, Velocity, Fronteers), toolmaker (Smush.it, YSlow 2.0) and a guitar hero wannabe. Problem As the previous post puts it: A slow CSS prevents the JavaScript following it from executing. And in addition, when the JS following the CSS is inline, it’s naturally syn
ECMAScript proposal: iterator helpers
Update 2022-12-15: New section “How will this proposal affect future JavaScript APIs?” In this blog post, we look at the ECMAScript proposal “Iterator helpers” by Gus Caplan, Michael Ficarra, Adam Vandolder, Jason Orendorff, Kevin Gibbons, and Yulia Startsev. It introduces utility methods for working with iterable data: .map(), .filter(), .take(), etc. The style of the proposed API clashes with th
JavaScript backend merged into GHC | IOG Engineering
A new JavaScript backend was merged into GHC on November 30th, 2022! This means that the next release of GHC will be able to emit code that runs in web browsers without requiring any extra tools, enabling Haskell for both front-end and back-end web applications. In this post, we, the GHC DevX team at IOG, describe the challenges we faced bringing GHCJS to GHC, how we overcame those challenges, and
ECMAScript proposal: RegExp flag `/v` makes character classes and character class escapes more powerful
ECMAScript proposal: RegExp flag /v makes character classes and character class escapes more powerful In this blog post, we look at the ECMAScript proposal “RegExp v flag with set notation + properties of strings” by Markus Scherer and Mathias Bynens. The new flag /v # The proposed new regular expression flag /v (.unicodeSets) enables three features: Support for multi-code-point graphemes (such a
Turbopack: High-performance bundler for React Server Components and TypeScript codebases - Vercel
Vercel's mission is to provide the speed and reliability innovators need to create at the moment of inspiration. Last year, we focused on speeding up the way Next.js bundles your apps. Each time we moved from a JavaScript-based tool to a Rust-based one, we saw enormous improvements. We migrated away from Babel, which resulted in 17x faster transpilation. We replaced Terser, which resulted in 6x fa
Why We're Breaking Up with CSS-in-JS
Hi, I'm Sam — software engineer at Spot and the 2nd most active maintainer of Emotion, a widely-popular CSS-in-JS library for React. This post will delve into what originally attracted me to CSS-in-JS, and why I (along with the rest of the Spot team) have decided to shift away from it. We'll start with an overview of CSS-in-JS and give an overview of its pros & cons. Then, we'll do a deep dive int
I turned JS into a compiled language (for fun and Wasm) — surma.dev
Toggle dark mode This is one of those times where I got so fascinated by the idea of a thing that I forgot to ask myself whether it’s a good idea to build the thing. The idea being, transpiling JavaScript to C++ so I can compile that to whatever I need. Obligatory Jeff Goldblum. I have arrived at the conclusion that I don’t think this specific approach is worth exploring further. This made it hard
QuickJS Javascript Engine
News 2024-01-13: New release (Changelog) 2023-12-09: New release (Changelog) Introduction QuickJS is a small and embeddable Javascript engine. It supports the ES2023 specification including modules, asynchronous generators, proxies and BigInt. It optionally supports mathematical extensions such as big decimal floating point numbers (BigDecimal), big binary floating point numbers (BigFloat) and ope
Intl.Segmenter で和文の改行をいい感じにしてみる
tl;dr ブラウザで文字列を表示する場合画面幅に応じて自動で改行されることがあります。英文などは分かち書きされているためブラウザは単語の区切りなどで改行することができますが、和文は文節が明確ではなく単語の途中で改行されてしまうことがあります。 この記事では、ECMA402 の Intl.Segmenter を用いて和文を分かち書きし、ブラウザに改行可能箇所を教えることでより読みやすいレイアウトを目指します。 (2023/04/14 追記) NPM package として公開しました 🚀 背景 ラテン文字を使用する多くの言語では語と語が空白で区切られていますが(以降分かち書き)、通常、日本語や中国語は分かち書きされていません。 一般的なブラウザでは表示領域(横幅)に対して表示させたい文字列が一行に収まらない場合自動で改行するような挙動になっています。英語のように既に分かち書きされた文の場
The new wave of Javascript web frameworks
The new wave of Javascript web frameworksMake sense of the proliferation of new Javascript web frameworks. A deep dive into the problems at scale and the recent evolution of innovation. IntroductionStaying current in the Javascript ecosystem is not for the faint of heart. It’s challenging for those entering the industry to follow what’s happening amongst the new libraries, frameworks, concepts, an
Optimize long tasks | Articles | web.dev
Published: September 30, 2022, Last updated: December 19, 2024 Common advice for keeping JavaScript apps fast tends to boil down to the following advice: "Don't block the main thread." "Break up your long tasks." This is great advice, but what work does it involve? Shipping less JavaScript is good, but does that automatically equate to more responsive user interfaces? Maybe, but maybe not. To unde
GitHub - preactjs/signals: Manage state with style in every framework
Signals is a performant state management library with two primary goals: Make it as easy as possible to write business logic for small up to complex apps. No matter how complex your logic is, your app updates should stay fast without you needing to think about it. Signals automatically optimize state updates behind the scenes to trigger the fewest updates necessary. They are lazy by default and au
MemLab: An open source framework for finding JavaScript memory leaks
MemLab: An open source framework for finding JavaScript memory leaks We’ve open-sourced MemLab, a JavaScript memory testing framework that automates memory leak detection. Finding and addressing the root cause of memory leaks is important for delivering a quality user experience on web applications. MemLab has helped engineers and developers at Meta improve user experience and make significant imp
Roll your own JavaScript runtime
In this post we’ll walk through creating a custom JavaScript runtime. Let’s call it runjs. Think of it as building a (much) simplified version of deno itself. A goal of this post is to create a CLI that can execute local JavaScript files, read a file, write a file, remove a file and has simplified console API. Let’s get started. Update 2022-12-04: updated the code samples to the latest version of
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The Most Popular CSS-in-JS Libraries (2023)
What is a realm in JavaScript?
GitHub - capricorn86/happy-dom: A JavaScript implementation of a web browser without its graphical user interface
GitHub - tc39/proposal-extractors: Extractors for ECMAScript
GitHub - sablejs/sablejs: 🏖️ The safer and faster ECMA5.1 interpreter written by JavaScript
GitHub - frameable/el: Minimal JavaScript application framework / WebComponents base class
