Media diagnostics · Primary-source explanation; examples are illustrative. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Separate acquisition from continued possession
The Screen Wake Lock API lets an eligible visible document request that the screen stay awake. MDN explains that system conditions, including visibility and power state, can reject a request or later release an acquired lock. Therefore a request which succeeded once does not prove the screen will stay on indefinitely. An interface showing a permanent active label without tracking release can misrepresent its actual state after the user switches tabs.
Test a clear transition
For an original supported browser exercise, request the lock through a deliberate page control, note its active state, switch away and return. Record whether the lock was released and whether a new request is needed for the current task. Keep the device power state in the report. These are suggested observations, not results of a browser test performed here. A released sentinel cannot simply be treated as a fresh active request.
Keep user control and the API limit visible
Show whether the lock is active and provide a way to release it when the task is finished. Feature check support and the secure context requirements, retaining a usable page when a request is unavailable. A screen wake lock is not a general exemption from every operating system background or network rule. This article concerns screen state lifecycle and does not promise uninterrupted playback, prevent all app suspension or identify a universal battery setting for televisions.