Page 9 - React

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React Product Configurator Pattern for Magento

Maxim Mironjuk - May 10, 2025

A React product configurator for Magento has to manage attribute combinations, live price calculation and stock in real time without slowing down across hundreds of variants. The right state model decides whether the configurator feels instantly responsive or noticeably lags on every click.

React Design Patterns

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Polymorphic Components with the as Prop in React

Maxim Mironjuk - May 09, 2025

Polymorphic components let the caller decide which HTML element actually gets rendered, without the component itself needing a separate variant for it. With the as prop and TypeScript's ElementType, this flexibility stays fully type safe, including correctly inherited props and working ref forwarding.

React

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React Server Components: The Complete Conceptual Guide

Maxim Mironjuk - May 06, 2025

React Server Components are not a new rendering model, they are a fundamental paradigm shift. Thinking in client-only components no longer works. Whoever truly understands RSC builds apps that ship less JavaScript, load faster and can encapsulate database access directly inside components.

React TypeScript

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React Drag and Drop Without dnd-kit - Native HTML5 DnD Tutorial

Maxim Mironjuk - April 28, 2025

External DnD libraries solve problems that do not exist in many projects, while bringing along bundle size, learning overhead and dependencies of their own. The native HTML5 Drag and Drop API is entirely sufficient for sortable lists, file upload and simple drag interactions, wrapped in a custom hook under 100 lines of TypeScript.

Tailwind React

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shadcn/ui: Building Your Own Component Library

Maxim Mironjuk - April 18, 2025

shadcn/ui is not a library in the classic sense, it is a catalog of copy-paste components built on Radix UI. Anyone who understands the copy-paste model can build a fully controllable, themeable component library for their own design system on top of it.

React Testing/E2E

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Visual Regression Testing for React: Catching UI Changes Automatically

Maxim Mironjuk - April 12, 2025

A CSS refactor can leave a component functionally unchanged and still silently break the layout. Unit and component tests check behavior, not appearance. Visual regression testing closes exactly this gap by comparing screenshots against a baseline, surfacing every pixel deviation before it reaches production.

React TypeScript

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React + TypeScript: satisfies, Template Literals and Generics

Maxim Mironjuk - April 09, 2025

Bringing TypeScript in React to the right level means more than typing props with interfaces. The satisfies operator, Template Literal Types, generics in components and discriminated unions enable props APIs that are impossible to misuse at runtime, because TypeScript flags every error while you write the code.

React Testing/E2E

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React Testing Library Best Practices 2026

Maxim Mironjuk - April 04, 2025

Tests that check implementation details break with every refactor. React Testing Library enforces tests from the user's perspective, with getByRole instead of getByTestId, userEvent instead of fireEvent, and MSW instead of fetch mocks.

React Testing/E2E

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Vitest: Faster Tests Than Jest for React

Maxim Mironjuk - March 23, 2025

Jest was the standard for React tests for years, with a slow start, cumbersome transformer configuration, and growing incompatibilities with ESM. Vitest shares Vite's configuration and transformer, starts in milliseconds, offers a Jest-compatible API, and integrates seamlessly into Vite-based React projects.

React Barrierefreiheit

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Focus Traps and Accessible Modals in React: The Complete Guide

Maxim Mironjuk - March 08, 2025

A modal without a focus trap lets keyboard users disappear into the background while the dialog sits visually in front. This guide shows how to implement a custom focus trap in React, set ARIA attributes correctly, and reliably restore focus after closing, all without a ready made library.