
React 19 hydration mismatch: why "Text content does not match server-rendered HTML"
The three real causes of hydration errors in SSR React apps, how to read React's dev diff, and when suppressHydrationWarning is actually the right call.
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The three real causes of hydration errors in SSR React apps, how to read React's dev diff, and when suppressHydrationWarning is actually the right call.

Server Components vs Client Components, the 'use client' and 'use server' directives, what runs where, and how they pair with Suspense and use().