Build installable, offline-first Progressive Web Apps: Service Worker caching strategies (Cache First, Stale-While-Revalidate), IndexedDB wrapper for structured local data, Background Sync queue that replays offline operations when network returns. Full TypeScript code included.
Practical Google Core Web Vitals playbook: LCP via preconnects/image-priority/CDN, CLS elimination via image dimensions/font-loading/placeholders, INP via long-task splitting + debouncing.
Node.js performance diagnostics: clinic.js one-click reports, reading flamegraphs for hot functions, event-loop blockers, memory leak stacks to pinpoint CPU/memory bottlenecks.
Astro innovations: Islands Architecture for minimal JS with partial hydration, Content Collections for type-safe Markdown/MDX management, ultra-fast zero-JS static sites.
End-to-end Rust to WASM setup: wasm-pack toolchain, wasm-bindgen type bindings, JS sync/async invocation, TypedArray memory sharing for compute-heavy browser workloads.
TypeScript's type system rivals a full programming language. This article systematically covers conditional types, mapped types, template literal types, infer inference, recursive types, distributive conditional types, and more. With 15+ real utility type implementations (DeepPartial, PathOf, PickByType, CamelCase, etc.), master solution approaches for type-challenges at intermediate difficulty and above.
