计时器
一款可同时运行多个计时器的倒计时工具。剩余时间根据绝对结束时间计算，因此在后台标签页中也能保持准确。
No timers yet. Add one above.
使用方法
- Enter a label and hours/minutes/seconds, then Add timer. The countdown starts immediately.
- Each timer can be paused, resumed, reset or deleted independently.
- When a timer finishes it beeps and its card flashes.
注意事项
Remaining time is always computed as end time minus now, so timers stay correct in background tabs and across page reloads. The timer list is stored in this device's local storage and never sent to a server. Sound becomes available after you interact with the page, per browser rules.
常见问题
- Will it beep if I close the tab?
- No. The tab must stay open for sound. If you reopen it later, the timer correctly shows as finished.