Hydration
Hydration attaches client behavior to HTML that was already rendered on the server.
How it works
When implemented well, the response contains meaningful content and crawlable links while JavaScript adds interactivity without replacing the document’s semantic core.
How to validate it
Disable JavaScript and verify that the page remains readable and navigable, then detect whether hydration unexpectedly removes or rewrites canonical elements.
Common failure
Hydration mismatches can replace correct server markup with an error, duplicate content, or a different link graph.
Machine-readable editions
The same article is available as Markdown and JSON. These alternates are linked here but are not submitted through the sitemap or IndexNow.