keep phone awake on timer#305
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spring1843
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Jun 30, 2026
spring1843
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- Timer app attempts to stop phone from going to sleep so user can continue to see the timer
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Pull request overview
This PR adds screen wake-lock support to the Timer tool so the device is less likely to sleep while timers are running, improving usability for long-running countdowns.
Changes:
- Introduces a new
useWakeLockhook wrapping the Screen Wake Lock API. - Integrates the hook into the Timer page to request/release wake locks based on timer activity.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 6 comments.
| File | Description |
|---|---|
| client/src/pages/tools/timer.tsx | Requests/releases a wake lock based on whether any timer is running. |
| client/src/hooks/use-wake-lock.ts | New hook encapsulating wake lock request/release and visibility handling. |
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
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| // Effect to manage the wake lock | ||
| useEffect(() => { | ||
| const hasRunningTimers = timers.some(timer => timer.isRunning); | ||
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| if (hasRunningTimers) { | ||
| void requestWakeLock(); | ||
| } else { | ||
| void releaseWakeLock(); | ||
| } | ||
| }, [timers, isLocked, requestWakeLock, releaseWakeLock]); |
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| shouldHoldLock.current = true; | ||
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| if (wakeLock.current || requestInFlight.current) { | ||
| return; | ||
| } | ||
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| requestInFlight.current = true; | ||
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| try { | ||
| const sentinel = await navigator.wakeLock.request("screen"); | ||
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| // If release() was called while the request was in flight, | ||
| // release the new sentinel immediately and do nothing. | ||
| if (!shouldHoldLock.current) { | ||
| void sentinel.release(); | ||
| return; | ||
| } |
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| shouldHoldLock.current = false; | ||
| const sentinel = wakeLock.current; | ||
| wakeLock.current = null; | ||
| requestInFlight.current = false; | ||
| void sentinel?.release(); | ||
| }; |
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