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This feature is well established and works across many devices and browser versions. It’s been available across browsers since August 2021.
The offsetTop read-only property of the VisualViewport interface returns the offset of the top edge of the visual viewport from the top edge of the layout viewport in CSS pixels, or 0 if current document is not fully active.
A double.
| CSSOM View Module # dom-visualviewport-offsettop |
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This page was last modified on Sep 15, 2025 by MDN contributors.
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