Page 47 - Maxim Mironjuk

Templates update automatically when reactive state changes: that is Alpine's core promise. But what about side effects outside the DOM? When a URL parameter needs updating, an API needs calling, or a localStorage value needs syncing, Alpine.js needs an explicit watcher. That is what $watch is for.

A misconfigured or completely missing Content Security Policy leaves the door wide open for cross site scripting attacks, even when the rest of the code is clean. This article walks through building directives like script src and frame ancestors correctly, using report only mode for a safe rollout, and hardening the policy specifically for Magento and Hyva storefronts.

The wrong state management choice costs React projects more in performance and maintainability than almost any other architecture decision. Context, Zustand and Jotai solve the same underlying problem in fundamentally different ways. This article explains the differences with real code examples and shows when each tool is the right choice.

The New Architecture replaces the old asynchronous bridge and its JSON serialization with JSI, a direct C++ interface between JavaScript and native code. Fabric takes over as the new renderer for synchronous layout, TurboModules load native modules lazily instead of eagerly at app startup, and Codegen generates type-safe interfaces for both platforms from a single TypeScript spec file.

JavaScript Numbers are 64-bit floats, and they silently lose precision for integers above 9 quadrillion (2^53). BigInt solves the problem: arbitrarily large integers without rounding errors, for IDs, cryptography, timestamps and financial calculations.

Before installing yet another monitoring tool, it is worth looking at what Redis already provides out of the box: the INFO command and redis-cli alone deliver memory statistics, hit rate, replication status, and live latency measurement in enough depth to cover most operational scenarios, once you know where to look.

Not every replica needs the full dataset of the source. Replication filters make it possible to build reporting replicas without sensitive customer data, or multi-store setups with cleanly separated databases, but they come with their own pitfalls the moment a filter needs to change after the fact.

A single heap snapshot shows only one moment in time, but the three snapshot technique systematically exposes which objects stay in memory despite the garbage collector. Retainer paths show exactly which reference prevents release, turning a vague memory suspicion into a concrete cause in the code.

A Symfony command that only ever prints a single success or failure line does its job fine when it's called from cron, but it wastes most of what the Console component offers. The moment a colleague runs that same command by hand to import test data or rebuild a search index, the quality of its output decides whether they trust the tool or keep a second terminal open with the logs, just in case. This article walks through how SymfonyStyle, ProgressBar and the Table helper work together, when interactive prompts actually help, and where the line to a cron-safe, non-interactive command sits.

When a user opens the same web application in several tabs, many background tasks run in parallel without anyone noticing: token refresh, cache building, syncing with the server. The Web Locks API provides an exclusive lock across tabs of the same origin through navigator.locks, letting you coordinate such tasks and reliably prevent duplicate execution.