'What does "hydration mismatch" mean in React or Vue?

While using both Vue and React, I regularly stumble upon so-called "hydration mismatches".

What does it mean?



Solution 1:[1]

**Note: hydrate has been replaced with hydrateRoot in React 18. **

Same as render(), but is used to hydrate a container whose HTML contents were rendered by ReactDOMServer

Official Doc

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Source: Stack Overflow

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Solution 1 Chinmay