Is it possible, in JavaScript, to detect when the screen is turned off in the Android & iOS browsers

Question

I was tracking down some ridiculously high load times that my app\'s javascript reported, and found that Android (and iOS) pause some JavaScript execution when the window is

Answer 1

There is few options to check it:

1. Using Visibility API

2. Using focus and blur events to detect browser tab visibility:

window.addEventListener("focus", handleBrowserState.bind(context, true));
window.addEventListener("blur", handleBrowserState.bind(context, false));

function handleBrowserState(isActive){
    // do something
}

3. Using timers, as mentioned above