Hydration mismatch
A difference between the server-rendered HTML and the DOM the client script produces.
What Hydration mismatch does not show
A fetcher reading only the first response records the server version, which may not be what any person saw.
Terms this definition uses
Related terms in Delivery and rendering
What arrives on the wire, and what only exists after something else runs.
broken embed · payload ratio · render dependence · render dependence gap · edge cache pinning · TTFB · Core Web Vitals · CrUX · field data · prompt injection · Dynamic rendering · DOM depth · Edge transformation · 202 interstitial · rate limiting · bot management platform
Questions about Hydration mismatch
What is Hydration mismatch?
A difference between the server-rendered HTML and the DOM the client script produces.
What does Hydration mismatch not show or guarantee?
A fetcher reading only the first response records the server version, which may not be what any person saw.
Which area of the glossary does Hydration mismatch belong to?
Delivery and rendering: What arrives on the wire, and what only exists after something else runs.
← prompt injection · Dynamic rendering →
See it in the full glossary · 772 terms across 19 areas.
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