vital-scans open quality ledger

nih.gov: Web standards & metadata — week 2026-W31

Web standards & metadata

Web-standards, metadata, and security checks in the spirit of ScanGov (methodology CC0), run across our scan rather than only the homepage.

Share of checked pages passing each standard (lowest first).
StandardPass ratePages
schema.org GovernmentOrganization markup0%0/1587
hreflang alternates declared0%0/1587
Open social presence (Mastodon/Bluesky) linked0%0/1587
Meta description present94%1499/1587
Canonical URL declared100%1586/1587
Page has a <title>100%1587/1587
Character encoding declared100%1586/1587
Document language (lang) set100%1587/1587
Responsive viewport (zoom not disabled)100%1587/1587
Open Graph tags (6/6)100%1587/1587
Twitter card metadata100%1587/1587

across 1587 page(s)

No Mastodon/Bluesky links detected on checked pages.

Progressive Web Resilience across 1587 page(s)

Capabilities that keep the site useful under real-world conditions — unreliable connectivity, interrupted sessions, mobile install. Not a compliance score: each row is independent evidence.

Progressive Web Resilience signals (lowest pass rate first).
CapabilityResultWhy it mattersEvidence
Web app manifest declared ✗ 0/1587 pages A web app manifest is required for installability and controls how the app appears when launched. —
Service worker registered ✗ 0/1587 pages A service worker is what makes offline access, caching, and background sync possible. —
Theme color declared ✗ 0/1587 pages Theme color controls the browser chrome/status-bar color when the site is installed or bookmarked. —
Apple touch icon (iOS/bookmark icon) ✗ 0/1587 pages iOS uses this icon for home-screen bookmarks and "Add to Home Screen" — without it the icon falls back to a screenshot. —
Manifest fetched and parsed successfully ✗ 0/1587 pages A manifest that fails to parse cannot drive installability or launch behavior even if the link is present. No manifest declared
Manifest declares a maskable icon ✗ 0/1587 pages A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content. No manifest declared
Service worker is active (not just registered) ✗ 0/1587 pages An active service worker (not just registered) is what actually intercepts requests and serves cached content. —
Service worker controls this page load ✗ 0/1587 pages A controlling service worker means THIS page load is being served/intercepted, not just a future one. —
Meets basic installability criteria ✗ 0/1587 pages Determines whether the browser can realistically offer "Add to Home Screen" / install, based on manifest + service worker + HTTPS together. no readable web app manifest; no service worker registered
HTTPS (required for service workers) ✓ 1587/1587 pages HTTPS is required for service workers and most install prompts. —