UA Ledger · Playable Test Bench · draft for review
Teaching laboratory. Cases run in this page against the authored functions. This is not a device panel, network approval, analytics-delivery proof or campaign result. Inputs are synthetic.
A resumed frame can carry a much larger elapsed time than the normal loop expects. This fixture checks a bounded simulation step rather than allowing an object to jump across the stage.
Primary documentation: MDN: frame delta (body read 2026-09-19).
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The passing result proves the cap for the supplied timestamps. It does not show that the actual game remains physically accurate or that a catch-up strategy is visually acceptable. A cap trades simulated elapsed time for stability, so the timer design must be explicit about which clock represents gameplay and which represents real time.