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interactionsVercel

Hydration-safe Inputs

MUST

MUST: Hydration-safe inputs (no lost focus/value)

Inputs must not lose focus or value after hydration

Bad

Good

Why it matters

In React and other frameworks with hydration, ensure input values and focus states persist from server-rendered HTML through client-side hydration. Losing focus or clearing values frustrates users who have already started typing.

References

Built by Gleb Stroganov, design engineer at Evil Martians.

The rules come from other people's skills and guidelines — Vercel, Rauno Freiberg, @Ibelick, impeccable, Emil Kowalski, Tailwind, RAMS — each one credited on the Sources page. The work here is extraction and wiring: every rule is pulled into one corpus, given a good and a bad example you can operate, a MUST/SHOULD/NEVER rule an agent can paste, and a link back to where it came from.