Spec's here, https://wicg.github.io/visual-viewport/, but I can't understand the difference.
Aren't the "initial containing block origin" coordinates always the same as the layout viewport coordinates?
Thank you.
What's the difference between VisualViewport.offsetTop and VisualViewport.pageTop?
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I bookmarked this post to take a look at it later if no one answers it, and here I am. I've just tested this API, and I can say that without zooming in VisualViewport.pageTop acts the same way as
pageYOffset:Next, VisualViewport.offsetTop remains 0 til you zoom in, and if you do it shows offset (made this example on my mobile device so it's more noticeable):
If you zoom in pageYOffset and VisualViewport.pageTop will be different and the difference equal to offset
VisualViewport.offsetTop(here 2974 - 2869 = 105):Resources about visual and layout viewports and other related things: