offsetTop
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.
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.