Troubleshooting
Most wake-lock problems come down to browser support, page visibility, or device power rules. This guide covers the fastest checks first.
If the page reports that wake lock is unavailable or blocked, the browser may not support it in the current context. Verify that you are using localhost or HTTPS and that the browser actually supports the API on your platform.
A later interruption often means the tab was hidden, the device entered a stricter power-saving mode, or the browser reclaimed the wake lock after a visibility change. This is why NoSleepScreen tries to request wake lock again when the page becomes visible, but some devices will still require a fresh user interaction.
Mobile operating systems are more aggressive about battery protection. Foreground requirements, battery saver, and device-specific behavior can all change whether wake lock remains active. Shorter sessions usually behave more reliably.