Kredis provides typed Redis structures as Active Model attributes, simplifying common patterns like counters, flags, and lists. Instead of raw Redis commands, I define kredis accessors on models that handle serialization automatically. Counters track

Unnecessary re-renders hurt performance, especially with expensive computations or callbacks passed to child components. useMemo memoizes computed values, recalculating only when dependencies change. useCallback memoizes function instances, preventing

Concerns extract shared logic from controllers into reusable modules, keeping controllers DRY. I create concerns for cross-cutting features like authentication, pagination, or error handling. The extend ActiveSupport::Concern pattern provides included

React favors composition over inheritance for code reuse. Instead of extending component classes, I compose smaller components into larger ones. Higher-order components (HOCs) wrap components to add behavior, while render props pass rendering logic as

Strong parameters prevent mass assignment vulnerabilities by explicitly permitting allowed attributes. For nested associations like a post with embedded images or comments, I use nested permit calls. Arrays of primitives use [] syntax, while hashes of

Breadcrumbs help users understand their location in deep hierarchies and provide quick navigation to parent pages. I build breadcrumbs from React Router's location state and route configuration. For nested routes, I define metadata like breadcrumb lab

Prefetching data when users hover over links makes navigation feel instant. React Query's prefetchQuery loads data into cache before users click. When they navigate, the data is already available and renders immediately. I use the onMouseEnter event o

Search inputs that fire API requests on every keystroke create poor UX and waste server resources. Debouncing delays the search until typing pauses, reducing requests dramatically. I combine a controlled input component with a custom useDebounce hook

Drag and drop UIs feel natural for reordering lists or organizing content. The dnd-kit library provides accessible, performant drag and drop with full keyboard support. I use DndContext to wrap draggable areas, useSortable for sortable list items, and

Dark mode improves usability in low-light conditions and reduces eye strain. I implement theme switching with Tailwind's dark: variant and CSS custom properties for colors. The theme preference persists in localStorage and syncs across tabs with stora

Combining React Hook Form with Zod provides type-safe form validation with a schema-first approach. Zod schemas define the shape and rules for form data, and the zodResolver bridges them to React Hook Form. TypeScript infers form types from schemas au

SPAs struggle with SEO because content loads via JavaScript after the initial HTML. React Helmet manages document head tags like title, meta descriptions, and Open Graph tags per route. Each page component declares its own metadata, and Helmet ensures