Insights & Guides

Web-Entwicklung

Web-Entwicklung — Praktische Guides zu Web-Entwicklung, Flutter, n8n-Automatisierung und digitaler Strategie. Echte Projekt-Einblicke von einer Senior-only-Agentur.

53 Artikel

·13 Minuten Lesezeit

Next.js App Router Forms in 2026: React Hook Form + Zod + Server Actions (Validation, Errors, UX)

A production-ready architecture for Next.js App Router forms using React Hook Form, Zod, and Server Actions — with shared schemas, secure server-side validation, async checks, file uploads, and consistent error handling.

Next.jsReactReact Hook FormZodServer ActionsValidationUXSecurity
Adrijan OmićevićArtikel lesen
·15 Minuten Lesezeit

Offline-Friendly React Apps with TanStack Query: Persistence, Retries, and Optimistic UI (2026 Guide)

Build resilient offline-first UX with TanStack Query: React Query offline persistence, retry and backoff strategies, safe optimistic updates, partial offline patterns, and MSW testing.

ReactTanStack QueryOfflinePWATestingMSW
Adrijan OmićevićArtikel lesen
·16 Minuten Lesezeit

React Virtualization Guide: Windowing Large Lists and Grids with TanStack Virtual (and When Not To)

A practical 2026 guide to React virtualization with TanStack Virtual: build fast lists and grids, add infinite loading and sticky headers, profile measurable gains, and avoid common edge cases like dynamic row heights and accessibility pitfalls.

ReactPerformanceTanStack VirtualVirtualizationInfinite Scroll
Adrijan OmićevićArtikel lesen
·14 Minuten Lesezeit

Next.js Supabase Realtime in 2026: End-to-End Blueprint for Chat, Presence, and Collaboration

Build production-ready realtime UI with Next.js App Router and Supabase Realtime: schema design, RLS, optimistic updates, presence, scaling, and troubleshooting duplicate events and permission mismatches.

Next.jsSupabaseRealtimePostgreSQLRLSWebSocketsApp RouterChatPresence
Adrijan OmićevićArtikel lesen
·15 Minuten Lesezeit

Next.js Authorization in the App Router: RBAC vs ABAC with Middleware, RLS, and Policy Patterns

A practical guide to Next.js authorization in the App Router using RBAC and ABAC — with middleware checks, server component guards, database-enforced RLS, decision matrix, and copy-paste policy patterns.

Next.jsAuthorizationSecurityRBACABACSupabasePostgreSQLApp Router
Adrijan OmićevićArtikel lesen
·14 Minuten Lesezeit

React Testing Strategy in 2026: Vitest + React Testing Library + MSW for Confident Releases

A pragmatic React testing strategy for 2026 using Vitest, React Testing Library, and MSW. Learn a realistic test pyramid, reduce flakiness, and ship confidently with CI-ready patterns.

ReactTestingVitestReact Testing LibraryMSWCI/CDQuality Assurance
Adrijan OmićevićArtikel lesen
·13 Minuten Lesezeit

Modern React Frontend Architecture: Feature-Based Modules, Boundaries, and Scalability

A practical guide to React frontend architecture feature-based modules: clear boundaries, shared layers, dependency rules, and a maintainable folder strategy for React and Next.js.

ReactNext.jsFrontend ArchitectureScalabilityCode OrganizationTesting
Adrijan OmićevićArtikel lesen
·16 Minuten Lesezeit

Observability for Next.js App Router in 2026: Sentry, OpenTelemetry, Traces, and Actionable Alerts

End-to-end setup for Next.js logging, monitoring, and tracing with Sentry and OpenTelemetry across Server Actions, Route Handlers, and Edge versus Node runtimes—plus dashboards, alert thresholds, and session-to-trace correlation.

Next.jsObservabilitySentryOpenTelemetryLoggingTracingMonitoring
Adrijan OmićevićArtikel lesen
·15 Minuten Lesezeit

Next.js App Router UX Patterns: Error Boundaries, Loading UI, and Streaming Done Right

A practical guide to resilient UX in Next.js App Router: route segment structure, error.tsx, loading.tsx, not-found.tsx, and Suspense streaming patterns for partial rendering, safer data fetching, and fewer layout shifts.

Next.jsReactApp RouterUXStreamingError HandlingPerformance
Adrijan OmićevićArtikel lesen
·13 Minuten Lesezeit

Building a Design System in Next.js with Radix UI, Tailwind, and Storybook: End-to-End Guide for 2026

A practical, production-ready approach to building and maintaining a Next.js design system using Radix UI for accessibility, Tailwind for styling, and Storybook for documentation, testing, and versioned releases.

Next.jsDesign SystemStorybookTailwind CSSRadix UIAccessibilityMonorepoTesting
Adrijan OmićevićArtikel lesen
·14 Minuten Lesezeit

The React Code Review Checklist We Use: Performance, Accessibility, and Maintainability

A practical React code review checklist focused on performance, accessibility, and maintainability, with examples, automation tips, and a copy-paste template.

ReactCode ReviewPerformanceAccessibilityTestingTypeScript
Adrijan OmićevićArtikel lesen
·16 Minuten Lesezeit

Next.js Multi‑Region Deployments: Patterns for Lower Latency on Vercel and Cloudflare

A practical guide to Next.js multi-region deployment in 2026: edge rendering, regional SSR, and data locality patterns on Vercel and Cloudflare, including database caveats and a latency validation checklist.

Next.jsVercelCloudflareEdge ComputingPerformanceArchitectureLatency
Adrijan OmićevićArtikel lesen