React: Guides and Practical Know-how | Page 2 | mironsoft Blog
React
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Apr 11, 2026
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.
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Apr 6, 2026
React StrictMode is not an optional comfort feature, it is an early-warning system for bugs that fail silently and treacherously in production. Why it renders components twice, fires useEffect twice, and what all of that has to do with Concurrent Features.
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Apr 6, 2026
The App Router is not just a new directory, it fundamentally changes the mental model of Next.js. Layouts, Server Components, nested routes and the new data fetching paradigm require a thought-out migration plan that avoids production outages and does not overwhelm the team.
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Apr 5, 2026
Managing a twenty field form with its own validation state per field through useState quickly leads to dozens of rerenders per keystroke. Form state libraries encapsulate this complexity, but differ fundamentally in architecture, performance and integration with schema validation.
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Apr 4, 2026
Manually managed server state in React always leads to the same problems: duplicate requests, stale data, inconsistent loading states and boilerplate spread across hundreds of components. TanStack Query v5 solves this with a declarative caching and synchronization system that turns server responses into a reactive, automatically synchronized part of the UI state.
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Apr 3, 2026
A POST request is quick to fire off, the real work starts afterwards: updating the cache, invalidating affected queries, cleanly rolling back on failure. useMutation offers a clear API pattern for this instead of scattered handler logic.
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Apr 1, 2026
Anyone testing React components that load data faces the same question: mock fetch or test against a real backend. MSW (Mock Service Worker) intercepts network requests at the protocol level, so components execute exactly the code they also run in production, while responses stay fully under control.
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Mar 31, 2026
A green jest-axe report does not mean a React application is actually usable with NVDA or VoiceOver. Automated tools find structural ARIA errors, but not confusing announcement order or illogical focus jumps. This guide shows how to build screen reader testing for React apps systematically across both layers.
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Mar 22, 2026
Suspense is far more than a spinner wrapper for React.lazy. In React 18 and 19 it coordinates parallel data fetches, prevents layout shifts, and makes loading states declarative, without a single isLoading boolean.
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Mar 21, 2026
A custom hook too often gets tested only indirectly through the component that uses it. That hides bugs in the hook logic and makes tests unnecessarily complex. renderHook from React Testing Library lets you check a hook's state, side effects and async updates directly, with no artificial host component at all.