JavaScript Development: Making a Web Worker optional
In case you have a lot of JavaScript related logic running inside a main thread or a Web Worker, it makes perfect sense to move expensive logic into another worker. Workers run inside a different thread using their own CPU if possible. However, there can be use cases where in some scenarios there is a lot of JS related workload on a given thread, while in other scenarios this thread is mostly idle
Modern web apps without JavaScript bundling or transpiling
August 12, 2021 Modern web apps without JavaScript bundling or transpiling I didn't much care for vanilla JavaScript prior to ES6. Through all of the 2000s, I chased different approaches to avoid writing too much of it. First there was RJS (Ruby-to-JavaScript). Then there was CoffeeScript. Both transpiling approaches that turned more enjoyable-to-write source code into the kind of JavaScript that
JavaScript needs more helper functions for iteration (map, filter, etc.) – where should we put them?
JavaScript needs more helper functions for iteration (map, filter, etc.) – where should we put them? Iteration is a standard that connects operations with data containers: Each operation that follows this standard, can be applied to each data container that implements this standard. In this blog post: We first explore three questions: How does JavaScript’s iteration work? What are its quirks? What
GraphQLクライアントにurqlをおすすめしたい
GraphQLのクライアントといえばApollo Clientが使われることが多いと思いますが、urqlというクライアントをおすすめする記事です。 TL;DR urqlのドキュメントキャッシュはApolloみたいなキャッシュ管理が要らなくて楽だからおすすめ ドキュメントキャッシュは、Mutationの __typename を見て汚れたキャッシュを捨てる仕組み Mutationのあと refetchQueries やってるならそれはurqlが自動でやってることと同じ なぜurqlをおすすめするのか この記事ではurqlのドキュメントキャッシュというキャッシュを仕組みだけを紹介します。雑に言うと、Apolloの正規化されたキャッシュより多少効率は落ちるものの煩雑な正規化されたキャッシュの管理から解き放たれるというものです。Apolloのキャッシュの管理に疲れた人にめちゃくちゃおすすめですし、
How to Eliminate Render-Blocking Resources: a Deep Dive
You might be here because Lighthouse told you to "eliminate render-blocking resources". Render-blocking resources are a common hurdle to rendering your page faster. They impact your Web Vitals which now impact your SEO. Slow render times also frustrate your users and can cause them to abandon your page. I worked with one client to reduce their render-blocking resources and improved their site load
Fastly Launches Highly-Secure Serverless JavaScript | Fastly
Why?ProductsServicesSolutionsDevsPartnersResourcesPricing Compute@Edge’s unique isolation sandbox technology enables a fast, secure JavaScript experience as developers continue to enter into the growing serverless computing landscape. SAN FRANCISCO -- JULY 21, 2021 -- Fastly, Inc. (NYSE: FSLY), a global edge cloud platform provider, today announced the availability of JavaScript in Compute@Edge, a
URLPattern brings routing to the web platform | Web Platform | Chrome for Developers
Published: July 22, 2021 Routing is a key piece of every web application. At its heart, routing takes a URL, applies a pattern matching or other app-specific logic to it, and then, usually, displays web content based on the result. Routing might be implemented in a number of ways: Server code that maps paths to files on a disk Logic in a single-page app that waits for changes to the current locati
The Road to Ember 4.0
Contributors to the Ember project have been hard at work since Ember Octane was released in December 2019. Over the duration of a challenging (and sometimes devastating) year and a half, we've shipped a powerful new feature (Named Blocks) and supported an ecosystem shifting to Octane conventions. We've more closely aligned Ember with wider frontend conventions through improved publishing & build t
Image To Text Conversion With React And Tesseract.js (OCR) — Smashing Magazine
Do you have to process data manually because it is served through images or scanned documents? An image-to-text conversion makes it possible to extract text from images to automate the processing of texts on images, videos, and scanned documents. In this article, we look at how to convert an image to text with React and Tesseract.js(OCR), preprocess images, and deal with the limitations of Tessera
Encoding data for POST requests
Right now, when you go to copilot.github.com you're greeted with this example: async function isPositive(text) { const response = await fetch(`http://text-processing.com/api/sentiment/`, { method: 'POST', body: `text=${text}`, headers: { 'Content-Type': 'application/x-www-form-urlencoded', }, }); const json = await response.json(); return json.label === 'pos'; } This is bad and might result in sec
Temporal: getting started with JavaScript’s new date time API
Temporal: getting started with JavaScript’s new date time API Updates: 2022-01-10: Temporal.now was renamed to Temporal.Now. 2021-06-30: Rearranged the content and created a section on the concepts and patterns used by the Temporal API. 2021-06-29: Clarified how Instant uses the ISO-8601 calendar. Listed the properties of some classes. Date, JavaScript’s current date time API is infamously difficu
Demystifying styled-components • Josh W. Comeau
Filed underReactoninJune 21st, 2021.Jun 2021.Last updatedoninJuly 17th, 2025.Jul 2025. When I first started using styled-components, it seemed like magic ✨. Somehow, using an obscure half-string-half-function syntax, the tool was able to take some arbitrary CSS and assign it to a React component, bypassing the CSS selectors we've always used. Like so many devs, I learned how to use styled-componen
ABEMA Web で Polyfill のコードをモダンブラウザ向けに 99% 削減した話 | CyberAgent Developers Blog
これらを踏まえて polyfill-library を使って Polyfill の出し分けをすることが最適解だと確信しました。 Polyfill の出し分けの実装方法 最初に実装したコードの全体像を見せると次の通りになります。それぞれの変数や関数についての説明は後ほどおこないます。 import crypto from "crypto"; import { Response, Request } from "express"; import { getPolyfillString } from "polyfill-library"; import polyfillLibraryPackageJson from "polyfill-library/package.json"; const FEATURES_OPTION = { flags: ["gated"] }; const FEATUR
Securing Your Website With Subresource Integrity | CSS-Tricks
You may have noticed that, for example, Bob and Mary have the same output. For hashing functions, this is called a “collision.” For our example scenario, it inevitably happens. Since we have seven names as inputs and only six possible outputs, we’re guaranteed at least one collision. A notable difference between this example and a hash function in practice is that practical hash functions are typi
Strykerを使ってTypeScriptでMutation Testingする
概要 JavaScript/TypeScript向けのMutation Testing FrameworkであるStryker-jsがいい感じになってきたので紹介してみます。簡単な紹介のみです。 対象読者 Strykerの概要を知りたい人 Mutation Testingよく知らないJSer/TSer Mutation Testing導入したいけどJS/TS用のツールが見つからなかった人 Mutation Testingとは テスト対象のコードを変更(Mutate)するミュータントを仕込み、Unit Testが正しくそれらのミュータントを退治できるか測定するものです。 一般的には退治できた割合が高いほど意味のあるUnit Testを書いていると言えます。 Wikipediaの項目にもある通りFuzzingの一種とも言えます。 Mutation Testing自体はGoogleが論文出してた
Making JavaScript run fast on WebAssembly - Bytecode Alliance
JavaScript in the browser runs many times faster than it did two decades ago. And that happened because the browser vendors spent that time working on intensive performance optimizations. Today, we’re starting work on optimizing JavaScript performance for entirely different environments, where different rules apply. And this is possible because of WebAssembly. We should be clear here—if you’re run
A Thorough Analysis Of CSS-in-JS | CSS-Tricks
DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! Wondering what’s even more challenging than choosing a JavaScript framework? You guessed it: choosing a CSS-in-JS solution. Why? Because there are more than 50 libraries out there, each of them offering a unique set of features. We tested 10 different libraries, which are listed here in no p
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用 ts-migrate 仙女棒讓 JS 專案瞬間migrate 成 TypeScript
(PDF) COSMICDUKE Cosmu with a twist of MiniDuke - F-Secure
Benchmarking JavaScript memory usage
