The Page Lifecycle API state of a web page (active, passive, hidden, frozen, terminated) for monitoring and telemetry libraries: one shared tracker, observers before exporters, back/forward cache restores.
typescript web-performance browser telemetry rum real-user-monitoring visibilitychange bfcache opentelemetry pagehide page-lifecycle page-lifecycle-api back-forward-cache
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Updated
Oct 12, 2026 - TypeScript