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Visibility-aware client polling: Timer install when online · case 02

Timer install when online.

Member previewVariant 2 · 3 implementations · 60 checks per implementation

Case contract

Only one poll may be in flight. Foreground polling pauses offline or hidden; a background policy permits hidden work. Missed ticks coalesce into one catch-up request and scheduling restarts relative to the current clock. Operation timer-install-when-online has the six explicit input/output oracles below.

Why this case matters

An offline client lifecycle model that isolates a state-management defect without DOM rendering or network services.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
timer-install-when-online scenario 2	`3`	`null`	Failed

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