#jest

#jest

TanStack RSCs are supported through three primitive APIs that allow manipulation of RSCs as any other stream of data, compatible with tools like React Query and TanStack Router.

Events are essential inputs to modern front-end systems. But when we mistake reactions for architecture, complexity quietly multiplies. Over time, many front-end architectures have come to resemble chains of reactions rather than models of structure. The result is systems that are expressive, but increasingly difficult to reason about.

When you assign the any type to a variable, you're essentially telling the compiler: Stop checking this. I'll handle it myself. At that moment, you've basically turned off TypeScript. Even worse, any tends to spread through a codebase. If a function returns any, every variable that receives that value becomes untyped as well.

The request for its API val request = Request[IO](Method.POST, uri"/jobs")val api = new AsyncJobApi // this will not compile since AsyncJobApi is not defined yet Minimal implementation to make it green: class AsyncJobApi Red test: The API should return a 202 Accepted response: "POST /jobs returns Accepted" in { val request = Request[IO](Method.POST, uri"/jobs") val api = new AsyncJobApi api.routes.orNotFound.run(request).asserting : response => response.status shouldBe Status.Accepted} Make it green: class AsyncJobApi { val routes: HttpRoutes[IO] = HttpRoutes.of[IO] : case req @ POST -> Root / "jobs" => Accepted()} 5.2 Add headers (Trivial Implementation) Red test: add X-Total-Count and Location headers with job ID (only the assertion is shown)

One of the reasons I've been digging Astro so much is that it nicely straddles the SSG world and Node.js server worlds. When building your app, you can make logical decisions about what should be done at build time versus what should be done dynamically. It's like having Express and Eleventy rolled into one solution.

The web is full of AI assistants that appear to understand application UIs, user data, and intent. In practice, however, most of these systems operate outside the application itself. When you try to build one from scratch, you quickly run into a core limitation: large language models have no native understanding of your React state, component hierarchy, or business logic.

This same sense of uncertainty can be triggered in software products. Many digital experiences consist of background tasks, file imports, system updates, and other long-running processes that run quietly and invisibly, leaving users with no indications of progress or feedback. The user initiates an action, like a sync, a publish, or a bulk update, and is responsible for the outcome, while the system does all the work out of sight.

Over the past decade, software development has undergone a massive transformation due to continuous innovations in tools, processors and novel architectures. In the past, most applications were monoliths and then shifted to microservices, and now we find ourselves embracing composability - a paradigm that prioritizes modular, reusable, and flexible software design. Instead of writing separate, tightly coupled applications, developers now compose software using reusable business capabilities that can be plugged into multiple projects. This enables greater scalability, maintainability, and collaboration across teams and organizations. At the heart of this movement is Bit Harmony, a framework designed to make composability a first-class citizen in modern web development.

We've identified, responsibly disclosed, and confirmed 2 critical, 2 high, 2 medium, 1 low security vulnerabilities. Vibe-Hacking Cloudflare's Vibe-Coded Next.js Replacement demonstrates that AI-generated code passing functional tests can still miss security hardening, and automated AI tooling can help find those vulnerabilities.

Modern web applications are no longer just "sites." They are long-lived, highly interactive systems that span multiple runtimes, global content delivery networks, edge caches, background workers, and increasingly complex data pipelines. They are expected to load instantly, remain responsive under poor network conditions, and degrade gracefully when something goes wrong.

When applications grow, state becomes messy, components break, and small changes ripple into unexpected bugs. This is where many learners realize that knowing React syntax is not the same as knowing how React applications are built.

Waku, a minimal React framework has released version 1.0 alpha, marking its public API surface area as stable as the project shifts focus towards bug fixes and compatibility improvements. Waku 1.0 alpha represents a significant milestone for the lightweight framework, which has been in development for nearly three years. The release stabilises the framework's public APIs and signals a transition from feature development to refinement and stability.

Two years ago, the Express team initiated a complete revamp of the project's governance. What was once a largely single-maintainer effort under Doug Wilson evolved into a structured Technical Committee (TC) with multiple active contributors. "Our goal was to evolve Express from a single-maintainer project into a sustainable, community-driven effort - one built on shared responsibility, clear processes, and long-term vision," Ulises explained.