How an online stopwatch stays accurate in a background tab
See why timestamp-derived elapsed time avoids accumulating callback drift when a browser repaints slowly.
ReadStopwatch fundamentals
Understand the timestamps behind every lap
Three practical guides explain background-tab rendering, lap versus total time, and deterministic CSV evidence.
Lap time versus total split time
Learn why every completed row needs both the latest segment duration and the cumulative elapsed duration.
ReadHow to export stopwatch laps to CSV
Keep chronological lap, split and total columns without sending the session to a server.
Read