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

CSS dvh tracks browser chrome like URL bars but treats keyboards as overlays, keeping height fixed while your UI gets covered.

How do I fix CSS dvh keyboard issues in React?

Install use-dynamic-viewport npm package, call the hook—it injects --dvh and --keyboard-height vars automatically.

Yes, handles platform diffs with offsetTop and width heuristics; tested across Safari and Chrome.

Core logic's in the repo—extract the resize handler; hook's React wrapper.

🛠️ Developer Tools

You're coding a sleek mobile chat app. Keyboard pops up. Your fixed bottom bar? Buried. CSS dvh was supposed to save you—until it didn't.

theAIcatchup Apr 08, 2026 4 min read

CSS dvh ignores mobile keyboards by spec design, treating them as overlays. 𝕏
use-dynamic-viewport hook injects perfect CSS vars for true dynamic height and keyboard offset. 𝕏
Cross-platform quirks demand heuristics; this tiny lib (0.8KB) nails iOS Safari and Android Chrome. 𝕏

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Community-driven. Code-first.

#CSS dvh #React hook #mobile viewport #on-screen keyboard #use-dynamic-viewport

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Originally reported by Dev.to