{
  "@context": "https://schema.org",
  "@type": "TechArticle",
  "@id": "https://anchorfact.org/kb/kb-2026-00107",
  "headline": "Page Visibility API",
  "description": "The Page Visibility API informs web applications whether a page is visible (active tab) or hidden (background tab). `document.visibilityState` is `'visible'` or `'hidden'`, with the `visibilitychange` event for detecting state transitions.",
  "dateCreated": "2026-05-22T14:59:47.635Z",
  "dateModified": "2026-05-22T14:59:47.635Z",
  "author": {
    "@type": "Organization",
    "name": "AnchorFact"
  },
  "publisher": {
    "@type": "Organization",
    "name": "AnchorFact",
    "url": "https://anchorfact.org"
  },
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "anchorfact:confidence": "high",
  "anchorfact:generationMethod": "human_only",
  "citation": []
}