Device screen should stay on during amp-story auto-advance

[newmuis]

Some stories have the experience of being more lean-back style, with auto-advance on every page. We should keep the screen on during this, if possible.

[newmuis]

AFAIK, the way to enable this is to always keep a video playing. We would need to experiment with it, but I would guess you could allocate a video (if the page does not have one) and play some default video on loop, while hidden.

[Enriqe]

I tried this and it's not working on iOS, also tried restarting the video in case it finished playing (causes device to go to sleep), but that didn't make the trick either...

...
        vid.style['z-index'] = '-1000';
        vid.setAttribute('loop', '');
        vid.setAttribute('playsinline', '');
        vid.setAttribute('title', 'No Sleep');
        vid.addEventListener('timeupdate', () => {
            if (vid.currentTime > 0.5) {
              vid.currentTime = Math.random()
            }
            if (vid.paused) {
              vid.play();
            }
          });
...

[Enriqe]

Poking and asking around it sounds like this is impossible in iOS 13+. The Wake Lock API seems to be underway, though.

[newmuis]

Hmm, so on iOS 13+, if you try a story like this one, does the device sleep?

[Enriqe]

Yep, and I have that snippet above where a video is playing on repeat in the background.

[Enriqe]

Investigating a bit more since I can keep it awake by visiting sites with real videos, maybe the video I was using was faulty