Page 21 - Maxim Mironjuk

A CLAUDE.md is the central context file that lets Claude Code know project conventions, tech stack, and commands before the first prompt is even written. Maintained well, it saves repeated explanations and prevents rule violations. Maintained poorly, it turns into a stale wall of text that nobody reads and that actively misleads Claude.

Implementing logging, CORS headers or request IDs separately in every single Nuxt Server Route produces code duplication in ten places at once. Nuxt Server Middleware in server/middleware runs before every handler and solves exactly these cross cutting concerns centrally, without any route knowing about it.

Streaming SSR splits a server response into several chunks instead of waiting for complete HTML before sending anything to the browser at all. React Suspense defines the boundaries where individual parts of a page are delivered later, while quickly available content becomes visible immediately.

Props make components configurable. Slots make them extensible. Scoped slots give the consumer control over presentation while the component keeps the logic. Anyone who truly understands slots and scoped slots in Vue.js can build components that fit seamlessly into any context.

A test case that fully and explicitly constructs a complex object with twenty fields, even though only a single one of these fields actually matters for the given test, buries the real testing intent behind a wall of irrelevant boilerplate data, making it hard for a later reader to tell which of the twenty values is actually decisive for the test outcome. The test data builder pattern solves this problem by providing sensible, realistic default values for all fields and making only the values actually relevant to a given test explicitly overridable.

A quantity discount that is understandable at a glance, and a sale countdown that cannot be defeated by a wrongly set client clock, sound like small details. In practice, exactly those details decide whether customers trust a price display or dismiss it as a trick.

Anyone who solves every interaction with a quickly hand-rolled x-data object in the template builds an unmaintainable tangle of business logic and markup over the course of months. Custom Alpine components built with Alpine.data(), a clean naming convention, safe PHP data passing and Alpine.store() for shared state make Hyvä frontends testable, reusable and CSP-compliant instead, even when a second or third module needs the same interaction.

Anonymous classes let you define a fully fledged class right at the point of use with new class(), without assigning a global name. Used correctly, they replace mocking libraries in tests, avoid unnecessary class names for one off implementations, and let you write more compact yet type safe code.

A single test run answers exclusively the question of whether the test suite succeeded at that particular moment, but reveals nothing about whether a given test has repeatedly failed sporadically over the past three months, whether the suite's total runtime is continuously growing, or whether certain weekdays systematically produce more failures than others. Only a systematically built, long-term maintained history makes these patterns visible at all, providing the actual foundation for sound decisions about a test suite's evolution, instead of relying exclusively on the impression left by the most recent run.

Tagged Template Literals are far more than pretty string interpolation. With a tag function in front of them, they turn into a powerful tool: SQL injection protection, safe HTML escaping, and domain-specific languages, all directly in JavaScript, without external parsers.