Chapter 6 – Test Tools
Hydration – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
The process of attaching client-side JavaScript interactivity to server-rendered HTML.
In simple words
Bringing a server-rendered page to life on the client with JavaScript.
Exam tip
Hydration mismatches are a top source of Next.js/TanStack Start production bugs.
Related terms
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