XSS

Prerequisite: Familiarity with the concepts introduced in Part 3 — Component Registry. Review it first if the terminology in this part is unfamiliar. Answer-first: Building secure, accessible Generative UI systems requires defensive engineering across Prompt-to-UI Injection Defenses and WCAG 2.1 AA Enforcement. By enforcing strict prop sanitization and embedding automated accessibility attributes (aria-live, focus traps, contrast compliance) into component templates, teams prevent XSS exploits while guaranteeing full accessibility. Implementing this architecture enforces sub-50ms P99 latency guarantees, strict component isolation, and automated observability pipelines required. ...

📖 Series Navigation: ← Previous Chapter: Redis Distributed State vs. Dapr Virtual Actors | Series Hub | Next Chapter: Part 10 — Envoy Gateway vs. Cilium eBPF Service Mesh → Part 9: Cookie vs. SessionStorage vs. LocalStorage Showdown: Network Headers Tax, Tab Isolation & Token Storage Architecture Answer-first: Choose HTTP Cookies (HttpOnly; Secure; SameSite=Strict; Path=/; __Host-) for server-authenticated sessions, SSR edge gatekeeping, and security tokens to neutralize XSS exfiltration. Use sessionStorage for tab-isolated, transient transactional workflows (e.g. multi-step checkout wizards) to prevent cross-tab state collision. Reserve localStorage exclusively for lightweight (<50KB), non-sensitive user preferences (e.g. dark mode, locale) to avoid synchronous main-thread I/O blocking that degrades Interaction to Next Paint (INP). For structured offline caching (>5MB), graduate immediately to IndexedDB/OPFS. ...