#CS#Web#Frontend#Hydration#Nextjs#SSR
Hydration: Bringing HTML to Life
Turning static HTML from Server (Dry) into Interactive App (Wet). The core concept of Next.js.
June 22, 2025
Codemapo
Turning static HTML from Server (Dry) into Interactive App (Wet). The core concept of Next.js.
Why does my server crash? OS's desperate struggle to manage limited memory. War against Fragmentation.
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A comprehensive deep dive into client-side storage. From Cookies to IndexedDB and the Cache API. We explore security best practices for JWT storage (XSS vs CSRF), performance implications of synchronous APIs, and how to build offline-first applications using Service Workers.
Fast by name. Partitioning around a Pivot. Why is it the standard library choice despite O(N²) worst case?
Hydration is SSR's destiny. The moment the server sends HTML, you need a process to bring that HTML to life. I initially thought "React handles it automatically," but in reality, there's a lot to consider: the gap between FCP and TTI, hydration mismatch errors, JavaScript bundle size, user experience.
React 18's Selective Hydration and Streaming SSR attempt to narrow this gap. Astro's Islands Architecture minimizes hydration altogether. Next.js's React Server Components fundamentally avoid the problem by creating components that don't need hydration.
Ultimately there's no single answer. Depending on your project's characteristics, if you need SSR, optimize hydration. If you have lots of static content, consider Islands Architecture. If you have complex interactions, CSR might be better. What matters is understanding "why ghost buttons appear." Only then can you improve user experience.