API reference / Common / PageView
Interface: PageView
One on-screen page projected into viewport space (CSS px), the unit an HTML overlay layer positions page chrome from: a corner button from a page's box, an inter-page divider from the gap between two consecutive boxes. Unlike everything else here, x/y/width/height are CSS px, not document points — the worker has already applied the current scroll/zoom — so an absolutely-positioned element drops straight onto the page. Recomputed each painted frame and streamed from the worker; see the overlay layer.