The Online Timer creates a browser countdown from hours, minutes, and seconds. The timer module also supports countdown, stopwatch, and Pomodoro state transitions in the interactive component.
Duration calculation
The setup form converts the entered duration into seconds:
Hours must be 0-99, while minutes and seconds must be 0-59. A zero duration is rejected.
Timer modes
- Countdown: Decreases remaining seconds until it reaches zero and marks the timer finished.
- Stopwatch: Increments elapsed seconds once per tick.
- Pomodoro: Alternates focus and break phases; every fourth completed focus session starts the long break configured by the component.
Questions
Does the timer work when the tab is hidden?
Browser scheduling can be throttled in background tabs. Keep the page active when precise timing matters.
Can I use it for Pomodoro sessions?
Yes. The component exposes Pomodoro focus, short-break, and long-break settings in addition to a regular countdown.
Does it save sessions?
No persistent session history is part of the timer calculation module. Resetting the component clears the current state.
Limitations
This is a browser timer, not a certified timekeeping device. System sleep, tab suspension, browser throttling, and device clock behavior can affect when a visual tick is processed.