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).
Capability
Result
Why it matters
Evidence
Service worker registered
✗ 0/568 pages
A service worker is what makes offline access, caching, and background sync possible.
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Service worker is active (not just registered)
✗ 0/568 pages
An active service worker (not just registered) is what actually intercepts requests and serves cached content.
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Service worker controls this page load
✗ 0/568 pages
A controlling service worker means THIS page load is being served/intercepted, not just a future one.
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Meets basic installability criteria
✗ 0/568 pages
Determines whether the browser can realistically offer "Add to Home Screen" / install, based on manifest + service worker + HTTPS together.