Prevent Android chrome from going idle / auto-locking / sleeping phone?

Question

I need to do on the website some feature to disabled idle/sleep phone. Does anyone try make this on phone with android ? is it in any way possible?

Answer 1

JavaScript in Chrome on Android (7.0) indeed shuts down after 5 min in sleep mode. Aaargh!

To prevent that, we need e.g. an audio object:

and play it at regular intervals:

function playDummyAudio() { dummyAudio.play(); }    
$(function() {
   var dummyAudio = document.querySelector('#dummyAudio');
   window.setInterval(playDummyAudio, 60 * 1000);
}

Note that the Audio object has to be "unlocked" in a user gesture callback. This can be accomplished e.g. by having a grey CSS overlay with a big fat dummy "Start" button, whose onClick() callback only hides the overlay and calls dummyAudio.load().