What is hydration in React SSR?

Short answer: Hydration refers to the process where React takes over the static HTML rendered by the server and attaches event listeners and restores interactivity.

Explain a bit more

This happens once the JavaScript bundle is loaded on the client. SSR: Server renders the HTML. Hydration: React "hydrates" the server-rendered HTML to make it interactive. This process allows the page to load quickly (thanks to the server-rendered HTML) and then become fully interactive once React takes over. React Ecosystem & Tools

Real-world example (ShopNest)

ShopNest’s storefront is React: components for ProductCard, CartDrawer, and CheckoutForm, with hooks for local UI state.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.