Add useVisualViewportSize hook#16
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Pull request overview
This PR adds a new useVisualViewportSize hook to expose window.visualViewport.height and window.visualViewport.offsetTop, along with per-hook documentation and an entry in the root Hooks Reference table.
Changes:
- Added
useVisualViewportSizehook implemented viauseSyncExternalStore. - Added hook documentation (
src/useVisualViewportSize/README.md) including usage example. - Registered the new hook in the root
README.mdHooks Reference table.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| src/useVisualViewportSize/index.ts | Implements the new hook using useSyncExternalStore and window.visualViewport. |
| src/useVisualViewportSize/README.md | Documents the hook API, SSR/unavailable behavior, and provides an example. |
| README.md | Adds useVisualViewportSize to the hooks reference list. |
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gabmontes
previously approved these changes
May 14, 2026
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|
@gndelia no version bump? |
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Author
|
gndelia
added a commit
to vetro-protocol/vetro-monorepo
that referenced
this pull request
May 14, 2026
The hook exposes offsetTop reactively but only subscribed to resize. Per the VisualViewport spec, offsetTop changes fire the scroll event (e.g., pinch-zoom panning after the keyboard is open), so resize-only subscription returns stale offsetTop in those cases. Mirror this in hemilabs/react-hooks#16 so the upstream stays the source of truth. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
gabmontes
approved these changes
May 14, 2026
ArturDolzan
approved these changes
May 15, 2026
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Description
Adds a new
useVisualViewportSizehook that returns the currentVisualViewportheight and top offset, useful for handling on-screen keyboards on mobile and pinch-zoom layout adjustments. Also adds the hook'sREADME.mdand registers it in the root README's Hooks Reference table.Note: no version bump in this PR — a few more changes are coming and they will all be released together.
Screenshots
N/A — no UI artifacts; pure hook addition.
Related issue(s)
N/A
Checklist