What is CSS dvh and why does it fail on keyboards?

CSS dvh tracks dynamic viewport height for URL bar changes but ignores on-screen keyboards, treating them as overlays. Layouts get covered; use visualViewport hacks to detect.

How to fix CSS dvh mobile keyboard issues in React?

Install use-dynamic-viewport npm package, call useDynamicViewport() in your root component. It sets CSS vars like --dvh and --keyboard-height automatically.

Does use-dynamic-viewport work on iOS Safari and Android?

Yes, handles both platforms' quirks—iOS offsetTop scrolling and Android innerHeight shrinking—with a width-change heuristic.

🌐 Frontend & Web

CSS dvh Still Sucks for Mobile Keyboards—Real Fix Inside

CSS dvh was supposed to kill the 100vh mobile nightmare. It didn't—keyboards still wreck your layouts. But one dev's hook might save you.

theAIcatchup Apr 08, 2026 3 min read

Mobile browser with keyboard open, showing fixed input bar positioned correctly above it

⚡ Key Takeaways

CSS dvh ignores mobile keyboards entirely, per spec—use visualViewport for detection. 𝕏
use-dynamic-viewport React hook auto-injects CSS vars to keep fixed elements above keyboards. 𝕏
Cross-platform quirks demand heuristics like width guards; test thoroughly. 𝕏

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theAIcatchup

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#CSS dvh #React hook #keyboard handling #mobile viewport #use-dynamic-viewport

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