はじめに こんにちは、今期は『ウマ娘シンデレラグレイ』と『LAZARUS』に期待を寄せているVPoEの河合(@vaaaaanquish)です。 表題の通り、エムスリーは、6月14日に開催される『関数型まつり 2025』のシルバースポンサーを務めます。 本記事は、私やエムスリーのScalaの思い出を語りながら、関数型まつりのモチベーションを上げていく、そういった記事になります。 はじめに 関数型まつり（ScalaMatsuri）とエムスリー エムスリーでのScala活用 関数型まつりで会いましょう！ We are hiring !!

こんにちは！サイボウズ株式会社 フロントエンドエキスパートチームの @mugi_uno です。 はじめにサイボウズ社内では毎週火曜日に Frontend Weekly と題し「一週間の間にあったフロントエンドニュースを共有する会」を開催しています。今回は、2025 年 4 月 15 日の Frontend Weekly で取り上げた記事や話題を紹介します。 取り上げた記事・話題 Intent to ship: Temporalhttps://groups.google.com/a/mozilla.org/g/dev-platform/c/RtsRo93ygO4/m/2Y...

4 月末にリリースされる Chrome 136 からは、一部のケースで「閲覧履歴があってもリンクの色が変わらない」状態が発生する。もしこの挙動に依存して閲覧をしているユーザがいれば、多少不便に感じるかもしれない。しかし、これは長年問題視されてきた、ユーザのプライバシー保護のための更新だ。ユーザ側でも、「サイトが壊れたのでは?」と思う人もいるだろうため、前半は技術用語を少なめに解説し、エンジニア向けの解説は後半で行う。

Let's build a configurable generator that equips your Ruby on Rails app with an authentication scaffold.

Let's explore what Rspack brings to the JavaScript ecosystem, its key offerings, and how to use Rspack to create a React project.

Find out how to test and improve your website performance. Detect what causes poor website speed and how to quickly test potential optimizations.

Introduce The Elm Architecture to MoonBit: build robust web app with simple principles

And What Let’s Encrypt has to do with itContinue reading on Medium »

Muddy WebはMuddy = 泥臭いとして、Webフロントエンドの開発現場における話やケースス ...

The EMEA region is a patchwork of diverse markets, industries, and regulatory environments, and it demands a partner-centric approach. That’s why I joined Cloudflare as VP of EMEA Partnerships.

Socket's Rubygems ecosystem support is moving from beta to GA, featuring enhanced security scanning to detect supply chain threats beyond traditional CVEs in your Ruby dependencies.

Shapes are an important aspect of graphic design.

Shapes are an important aspect of graphic design.

In this episode, I'm joined by colleagues David Rees, Hélène Sauvé, Ivan Mladjenovic and Emma Pearce. Together, we delve into the practical applications and limitations of agentic AI and its implications for enterprise AI deployments.

Comparing GitHub-hosted vs self-hosted runners for your CI/CD workflows? This deep dive explores important factors to consider when making this critical infrastructure decision for your development team.The post When to choose GitHub-Hosted runners or self-hosted runners with GitHub Actions appeared first on The GitHub Blog.

MISRA coding guidelines are a standard for automotive and other safety critical systems. SonarQube helps C++ developers deliver MISRA C++:2023 compliant apps with MISRA Compliance Early Access available in SonarQube Server Enterprise and Data Center.

the power to block IP addresses associated with unauthorized football streaming—without distinguishing between infringing and non-infringing services. As a result, legitimate, unrelated websites that people depend on are now inaccessible in Spain.A Spanish court has granted LaLigaIn December 2024, Commercial Court No. 6 of Barcelona authorized LaLiga to require Spanish ISPs, including Movistar, Vodafone, and Orange, to block IP addresses associated with unauthorized football streaming. The court

Dark mode isn’t just a trendy aesthetic. It’s a gateway to more inclusive digital experiences, but only if designed thoughtfully. Discover how to craft dark modes that don’t just look good but work for everyone, from those with light sensitivity to machine learning algorithms.

Learn how to build an AI agent for commit analysis with summaries, security checks, and style feedback.The post How to Build an AI Agent to Help with Daily Tasks appeared first on Semaphore.

FormAIdable is a browser extension for Chrome and Firefox that extracts information from one tab and automatically populates form fields in another. It makes a great tutorial for building extensions.

I used to use Sass a lot — especially when I was working on extremely complicated CSS codebases as a consultant. Sass definitely is not "dead" either — tech doesn't die, it's 1s and 0s — it's extremely useful still!Sure, CSS is bringing stuff like nesting and mixins over from Sass, but it doesn't mean Sass is useless or "replaced". I personally don't use Sass anymore because I don't need to but if the needs were there, I would use it in a heartbeat.Stuart's guide here on when and where to use cu

こんにちは、コーポレートチームの宮川です。以前の記事で、IntuneとJamfをどう活用しているかについて紹介しました。今回は、それらのMDMの機能を活用してPC管理業務を効率化をした事例について紹介します。 Intun […]

Astro 5.7 has a basketload of treats, including stable Sessions and SVG components and a new Experimental Fonts API.

I’ve been trying to improve my writing so I read Writing with Style, the Economist’s style guide book.Here were my main takeaways:Use short sentences. They’re more memorable. They’re easier to read. They’re generally easier to write.Colons are for setup and delivery. They describe them as “dramatic”.One thought per paragraph. The paragraph is a “unit of thought”, according to this book and to H.W. Fowler. Sometimes, you have a one-sentence paragraph because the thought fits into a single sentenc

Recruiter screens can feel like a mystery. What are we actually looking for, and how do you stand out in just 15 minutes?

Today marks my first day in a new role: the DOM Core team at Mozilla. If you've read my prior post titled 100 patches to 5 browsers in 18 months then maybe this isn't a surprise to you - or maybe it is! I should probably call out this line from that post:Am I looking for a job?The answer has always been no. I wasn't contributing to browsers in the hopes of being hired. I was doing it because I love the web and wanted to push it forward. I wasn't really looking for new roles. I spent almost 8 yea

こんにちは、Service Reliability Group(SRG)の鬼海 雄太(@fat47) ...

The Socket Research Team investigates a malicious npm package that appears to be an Advcash integration but triggers a reverse shell during payment success, targeting servers handling transactions.

After years navigating the world of high-growth tech, I’ve learned to recognize a special opportunity when I see one. That’s exactly why I’m thrilled to join Cloudflare as Chief People Officer.

I’m not the world’s biggest fan of LQIP’s (low quality image placeholders) generally (doing nothing other than handling aspect ratio is… fine), but I really like how much creativity it inspires. I’ve seen a ton of different approaches to it over the years, that all use different technology and all have different advantages and disadvantages. […]

Convert Figma designs to iOS apps using Builder's Visual Copilot plugin. Save time and maintain pixel-perfect designs across screens.

We’ve closed out Developer Week 2025. Here’s a quick recap of the announcements and in-depth technical explorations that went out during the week.

Learn how to leverage GitHub Copilot to make your code more secure.The post GitHub for Beginners: Security best practices with GitHub Copilot appeared first on The GitHub Blog.

is extremely fast code search. You can search over a million repositories for specific code snippets, files, or paths. Search results need to appear instantly without loading spinners.GrepOriginally built with Create React App (CRA) as a fully client-rendered Single-Page App (SPA), Grep was fast—but with , we wanted to update the codebase to make it even faster and easier to maintain going forward.CRA now deprecatedHere's how we migrated Grep to Next.js—keeping the interactivity of a SPA, but wi

SvelteKit routes with dynamic segments—like —are now individually recognized and surfaced by Vercel Observability. This replaces the previous behavior where all dynamic routes appeared under a single entry./blog/[slug]/fnThis is available with version 5.7.0 of . Upgrade to unlock improved observability for your SvelteKit projects. @sveltejs/adapter-vercelLearn more about .Vercel ObservabilityRead more

When OpenAI released GPT-4 back in March 2023, they kickstarted the AI revolution. The consensus online was that front-end development jobs would be totally eliminated within a year or two.Well, it’s been more than two years since then, and I thought it was worth revisiting some of those early predictions, and seeing if we can glean any insights about where things are headed.

Custom cursors with CSS are great, but we can take things to the next level with JavaScript. Using JavaScript, we can transition between cursor states, place dynamic text within the cursor, apply complex animations, and apply filters.Next Level CSS Styling for Cursors originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

Have you ever wondered why your site got faster, but your business and user engagement metrics didn't improve? The answer might lie on the performance plateau.Have you ever asked yourself these questions?"I made my pages faster, but my business and user engagement metrics didn't change. WHY???""How do I know how fast my site should be?""How can I demonstrate the business value of page speed to people in my organization?"The answers might lie with identifying and understanding the performance pla

Build a simple AI chat app using React.js on Next.js and the OpenAI API ...

After a wonderful week in San Francisco and Mountain View, the week ended in a disaster when my colleague and friend Adam was told to find another role within the company.

こんにちは。PR TIMESでフロントエンドエンジニアをしている夛田(@unachang113)です。 今回はエディターの機能の導線改善でリスト機能の利用数が上がった話をしようと思います。 リスト機能とは？ 「リスト機能 […]

Announcing the Astro Agency Partner Program, a new way to connect with expert Astro agencies

ArkType is a TypeScript-first runtime validation library built to erase the boundary between static type safety and runtime enforcement.

Everything you need to know to implement and validate JWTs securely in Python — from signing to verifying with JWKS, with code examples and best practices throughout.

Rails 8 promises to make it easier to deploy and host Rails apps, no-PaaS required. Jump in with us to see where it delivers and where it falls short.

Understanding the new 16-bit floating point array in JavaScript

サイバーエージェントが主催する生成AIに特化した技術勉強会「CA. ai#1」。社内における生成AI ...

There are a ton of difficult questions to answer around generative AI. Is it useful and how useful is it? And is it moral both in the way it is built and the way it is used? Let's dig in.

<p>In this blog post we look at:</p><ul><li>The current best practice for deploying library packages: <code>.js</code>, <code>.js.map</code>, <code>.d.ts</code>, <code>.d.ts.map</code>, <code>.ts</code></li><li>Recent new developments in compiling and deploying TypeScript: type stripping, isolated declarations, JSR, etc.</li><li>What the future of deploying TypeScript might look like: type stripping in browsers, etc.</li></ul>

An exploration of Google's new open protocol that enables different AI systems to exchange information and collaborate

<p>In this blog post, we examine how we can test types in TypeScript:</p><ul><li>First, we look at the library <code>asserttt</code> and the CLI tool <code>ts-expect-error</code>.</li><li>Then, we consider which functionality could be built into TypeScript.</li></ul>

An introduction to writing WebGL shaders using gradient noise and cool math.

AI エージェント同士の連携を標準化するために Agent2Agent プロトコル（A2A）を発表しました。A2A プロトコルは基盤となるフレームワークやベンダーに依存せず、エージェント同士が安全な方法で相互に通信できるように設計されています。この記事ではサンプルコードを通じて A2A プロトコルを使用した AI エージェントの連携を体験してみます。

Explore the iterative development journey of GitHub's sub-issues feature. Learn how we leveraged sub-issues to build and refine sub-issues, breaking down larger tasks into smaller, manageable ones.The post Introducing sub-issues: Enhancing issue management on GitHub appeared first on The GitHub Blog.

Web developers' skills in system design and API integration are key for building effective AI agent systems. Learn about core concepts and common patterns.

The Temporal proposal provides a replacement for Date, a long standing pain-point in the JavaScript language. This blog post describes some of the history and motivation behind the proposal. The Temporal API itself is well docmented on MDN.

Everyone's talking about MCP these days when it comes to large language models (LLMs)—here’s what you need to know. The post What the heck is MCP and why is everyone talking about it? appeared first on The GitHub Blog.

Last we checked in with how the web platform was planning on helping us with “masonry” layout, it was a versus battle between “just use grid” and “make a new layout type”. Now Apple folks have an idea: a new shorthand property called item-flow. Nothing is decided here (I don’t think), but it seems very […]

Cloudflare Containers are coming this June. Run new types of workloads on our network with an experience that is simple, scalable, global and deeply integrated with Workers.

Discover how developers are using Cloudflare to scale AI workloads and streamline automation and how participants in Workers Launchpad Cohort #4 have built, and startups participating in Cohort #5

We’re announcing Workers VPC: a global private network that allows applications deployed on Cloudflare Workers to connect to your legacy cloud infrastructure.

Cloudflare’s Startup Program offers up to $250,000 in credits for companies building on our Developer Platform across 4 tiers: $5,000, $25,000, $100,000, and $250,000.

We transitioned to Cloudflare Workflows to manage complex, multi-step processes more efficiently. This shift replaced our National Center for Missing & Exploited Children (NCMEC) reporting system.

The Socket Threat Research Team uncovers how threat actors weaponize shell techniques across npm, PyPI, and Go ecosystems to maintain persistence and exfiltrate data.

Learn about recent developments in Certificate Transparency (CT), and how we built a next-generation CT log on top of Cloudflare's Developer Platform.

We just made Workers AI inference faster with speculative decoding & prefix caching. Use our new batch inference for handling large request volumes seamlessly.

This CSS-Tricks update highlights significant progress in the Almanac, recent podcast appearances, a new CSS counters guide, and the addition of several new authors contributing valuable content.CSS-Tricks Chronicles XLIII originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

この記事では、Cloud Service Mesh for Cloud Run を利用して PR 環境を構築する方法について紹介します。 背景・概要 newmo ではトランクベース開発を行なっているため、開発環境での動作確認は main branch (trunk) に merge されていることが前提になっています。 そのため現状では、手軽に開発環境で API の動作確認ができなかったり、動作検証が十分でないコードが main branch に merge されてしまう課題があります。CI での test 実行などにより一定品質は担保していますが 、PR 環境 (GitHub の Pull …

In this post we will see how Higher Kinded Types types can help increase the flexibility of our code and reduce duplication.

Browsers are starting to roll out changes in default UA styles for nested section headings. This post describes the incoming changes, how to identify if it's an issue on your websites, and hints for conformant and better-structured pages.

サイバーエージェントは、生成AIを会社の競争力とするために全社で取り組んでいます。20 ...

At VulnCon 2025, NIST scrapped its NVD consortium plans, admitted it can't keep up with CVEs, and outlined automation efforts amid a mounting backlog.

We redesigned our GitHub PR comments to deliver clear, actionable security insights without adding noise to your workflow.

New metadata fields in Mux Video let you add titles, creator details, and external IDs to videos for better organization and analytics.

Security should be native to your workflow, not a painful separate process.The post How we’re making security easier for the average developer appeared first on The GitHub Blog.

Do you need it? Not really, custom properties are probably a better bet. But it still has a bit of utility and it's fun to think about.

記事は ics.media へアクセスしてご覧ください。

“Gilding the lily” isn’t always bad. In design, a touch of metaphorical gold — a subtle animated transition, a hint of color, or added depth in a drop shadow — can help communicate a level of care and attention that builds trust. But first? You need a lily. Nail the fundamentals. Then, gild it carefully.

We re-architected Super Slurper from the ground up using our Developer Platform — leveraging Cloudflare Workers, Durable Objects, and Queues — and improved transfer speeds by up to 5x.

R2 Data Catalog is now in public beta: a managed Apache Iceberg data catalog built directly into your R2 bucket.

D1, Cloudflare’s managed SQL database, announces read replication beta. Here's a deep dive of the read replication implementation and how your queries can remain consistent across all regions.

We’ve just shipped our new streaming ingestion service, Pipelines — and we’ve acquired Arroyo, enabling us to bring new SQL-based, stateful transformations to Pipelines and R2.

Node.js 18 (LTS support ends April 30, 2025) and the Vercel legacy build image will be deprecated on August 1, 2025. If you are still using the legacy build image on this date, new builds will display an error.How do I know if I am still using the legacy build image?What changes between the legacy build image and latest build image?Will my existing deployments be affected?Existing deployments However, the Node.js version will need to be updated on your next deployment.will not be affected. How c

Most of the time, people showcase Tailwind's @apply feature with one of Tailwind's single-property utilities (which changes a single CSS declaration). When showcased this way, @apply doesn't sound promising at all. So obviously, nobody wants to use it. Personally, I think Tailwind's @apply feature is better than described.Tailwind’s @apply Feature is Better Than it Sounds originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

If I were starting with CSS today for the very first time, I would first want to spend time understanding writing modes because that’s a great place to wrap your head around direction and document flow. But right after that, …Cascading Layouts: A Workshop on Resilient CSS Layouts originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

We're equal parts delighted and excited to share that Piccalilli will be working with Mat Marquis and Scott Riley to launch two premium courses this year: JavaScript for Everyone and Mindful Design.As promised last year when we launched Complete CSS, that course was the start of our aim of bringing extremely high quality, affordable education to the front-end development and design communities.Let's take a look at each course.JavaScript for EveryoneJavaScript is hard and it's a major part of our

Learn how self-hosted CI/CD agents improve build speed, scalability, and security by running within your own infrastructure.The post How to Scale CI/CD With Self-Hosted Agents appeared first on Semaphore.

A CLI tool that integrates Figma designs into your codebase, generating production-ready code that matches your existing components and styling patterns.

こんにちは！PR TIMES ソフトウェアエンジニアの河瀨翔吾（@shogogg）です。現在は主にバックエンドの開発を担当しています。好きなエナジードリンクは「モンスターウルトラ」です。 今回は先日行われた PHPerK […]

こんにちは。Feature2 Unitのうなすけです。我々のチームの担当範囲のひとつには「データの入出力」というものがあり、お客様からAPI呼び出しやファイルアップロードなどで受け取ったデータを適切に処理するコンポーネントの運用・開発をしています。 我々の担当している機能のひとつに、お客様からアップロードしていただいたCSVファイルの内容をデータベースにインポートするというものがあります。これは裏側ではEmbulkを使ってMySQL(Aurora)に投入するということを行っています。 このとき、アップロードされるCSVの内容に日本語(マルチバイト文字列)を含められるように機能追加しようとしたと…

StyleX v0.12.0 introduces performance optimizations, several bug fixes, a new lint rule, and some cleanup of deprecated packages.

Prisma is one of the most popular Object-Relational Mappers (ORMs) in the TypeScript/JavaScript ecosystem due to its robust type-safety guarantees and seamless integration with frameworks like Next.js.

Iframes might seem convenient, but they come with serious security risks like XSS, session hijacking, and phishing. This article breaks down why iframes can put your site at risk and how to protect it.

Here is how you can reduce HTML file size to improve web performance and Core Web Vitals on your website.

「型システムの仕組み - TypeScriptで実装しながら学ぶ型とプログラミング言語」という本を書きました。 かんたんな型チェッカを自作してみることで、型システムの仕組みを概観する本です。 型チェックする対象の言語はTypeScript（のサブセット言語）、型チェッカを実装するための言語もTypeScriptです。 たとえば、次のようなプログラムが型チェックできます。const add = (x: number, y: number) => { return x + y; } const a = add(1, 2); const b = a + true;

Learn how to scale your React project using Layered React Structure (LRS). Take your app from small-time to enterprise grade by organizing your code better.

Learn how to identify which CVE Numbering Authority is responsible for the record, how to contact them, and what to include with your suggestion.The post How to request a change to a CVE record appeared first on The GitHub Blog.

Now that we're starting to be able to apply types (like `number`) to values of attributes we pull of HTML elements in CSS, doing interesting things with is easier.

Debugging requires implementation to get the right data for you to resolve issues quickly. Here's how you can use Deno to capture necessary telemetry data without any additional work.

Announcing Cloudflare Realtime and RealtimeKit, a complete toolkit for shipping real-time audio and video apps in days with SDKs for Kotlin, React Native, Swift, JavaScript, and Flutter.

Securely store, manage and deploy account level secrets to Cloudflare Workers through Cloudflare Secrets Store, available in beta – with role-based access control, audit logging and Wrangler support.

Cloudflare Snippets are now generally available, enabling fast, cost-free JavaScript-based HTTP traffic modifications across all paid plans.

Cloudflare has been tracking and comparing our speed with other top networks since 2021. Let’s take a look at how things have changed since our last update.

We’ve improved Observability for Workers by announcing the General Availability of Workers Logs and the introduction of the Query Builder to help you investigate log events across all of your Workers.

Chrome has prototyped these features and released them in Chrome 135. Adam Argyle has a wonderful explainer over at the Chrome Developer blog. Kevin Powell has an equally wonderful video where he follows the explainer. This post is me taking notes from them.CSS Carousels originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

The powers across the web, and today we're announcing the —a best-in-class, production-ready template for building conversational AI applications like ChatGPT or Claude artifacts. AI SDKincredible applicationsChat SDKRead more

xAI's latest and most powerful Grok 3 models are now available through the Vercel Marketplace, bringing state-of-the-art AI capabilities to your Vercel projects.To get started, you can use the in your project:AI SDK xAI providerThen, with Vercel CLI (or ):install the xAI Marketplace Integrationfrom the dashboardOnce you've accepted the terms, you'll be able to use Grok models from within your project, with no additional steps necessary. To help you get started, we've also made a . To learn more

Our redesigned Repositories page adds alert severity, filtering, and tabs for faster triage and clearer insights across all your projects.

Unlock faster, more efficient autoscaling by combining GKE Autopilot with Fermyon's Platform for Kubernetes high-density WebAssembly runtime—scaling thousands of apps per node without overprovisioning.