Page 207 - Maxim Mironjuk

CSS Nesting is natively available in all modern browsers in 2026. The & selector, nested media queries, and at-rules like @layer and @supports inside rule blocks make preprocessors unnecessary for many projects. What once required Sass, Less, or PostCSS now works directly in the browser, with no build step, no source maps, and no dependencies.

Legacy code is code without tests, and it cannot be changed safely without tests. The way out of this dilemma begins with characterization tests: tests that document the actual behavior, not the desired one. Introduce seams, break static dependencies and extract classes step by step, without changing a single line of production logic before the first test is green.

A Slack message that merely reports "build failed", without stating which test was affected, since when the problem exists, or whether it's even known flakiness, forces every recipient to click into the CI interface just to answer the most basic question of what actually happened. A well-designed Slack integration instead delivers enough context in the alert itself to immediately gauge urgency, while targeted filtering keeps the team from sliding into dangerous alert fatigue through permanent, ultimately ignored noise.

The File System Access API gives web applications real read and write access to local files and folders, without the classic detour through uploads and downloads. Anyone building editors, image tools or data exports in the browser gets behavior that feels almost like a native desktop application, including a permission model and persistent handles.

Tests that pass reliably on their own but suddenly fail in the full suite or under parallel execution almost always point to shared state between browser storage, database, and test data. This article shows concrete isolation strategies for Cypress and Playwright, from unique test data per worker to clean teardown, so your E2E suites stay stable, parallel safe, and reproducible.

Message queues decouple PHP applications from slow or unreliable neighboring systems and shift work into asynchronous worker processes. Once you understand how acknowledgments, prefetch and dead letter queues interact, you can drive message queues from PHP so that messages are neither lost nor processed twice.

A fluent interface is supposed to make code more readable, yet in practice it often ends up as a chain that is hard to debug and has no clear error path. With return $this, careful type safety between self and static, and immutability, you can build a fluent interface that actually makes method chaining safe instead of just making it look elegant.

An iPad screen has long stopped being a guaranteed, fixed full screen space for an app, and can shrink to a fraction of its original width at any moment through Split View, Slide Over or Stage Manager, without the app ever restarting. Anyone who bakes fixed pixel widths or an assumed screen orientation into their components will eventually see clipped content or overlapping elements. This article covers how React Native apps respond to these window size changes, which responsive layout strategies replace fixed full screen assumptions, and how to practically test the different multitasking states.

A well thought out design token system is the foundation of every scalable frontend project. With Tailwind CSS v4 and @theme, design tokens become CSS Custom Properties that are simultaneously available as Tailwind utilities, in CSS properties and in JavaScript, a true single source of truth for colors, typography, spacing and more.

A backoffice API and a public API share HTTP as transport, but their requirements for stability, backward compatibility, security, and error models differ so fundamentally that a unified design inevitably makes one of the two worse.