Architecture Patterns

Hydration:

In SSR, after the "static" HTML is shown, the browser still needs to "attach" JavaScript to make the page interactive. This "gap" where the page is visible but "frozen" is a common UX pain point. Optimized Hydration strategies (like Lazy or Partial Hydration) ensure that only the critical parts of the page are made interactive first. It makes the site feel fast and responsive even on slow mobile devices.