I am trying to send regular heartbeats from the frontend in a javascript web worker (using Angular 15.2) but I noticed that its execution stops after some time, when the focus is not anymore on the browser (MS Edge here), or the computer screen is locked.

I used the following code in the Web Worker

    let count = 0

    while (true)
    {
        count++;
        console.log("while background log " + count);
        console.log(new Date().toLocaleString());
        sleep (60000);
    }

And I can see it stops after some time in the console logs.
Here it stopped at 10:39:03PM around 1 hour after 1 locked the screen and resumed when I unlocked the screen in the morning):

151.c4d77d78b4f4b23d.js:1 while background log 98
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:32:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 99
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:33:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 100
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:34:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 101
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:35:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 102
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:36:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 103
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:37:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 104
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:38:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 105
151.c4d77d78b4f4b23d.js:1 5/12/2024, 10:39:03 PM
151.c4d77d78b4f4b23d.js:1 while background log 106
151.c4d77d78b4f4b23d.js:1 5/13/2024, 7:30:51 AM

Is there an explanation to this?
Another point to notice is that this behavior is not happening when I leave the developer tools panel open, the Web Worker does not get paused.

Is it driven by the browser only? Do we have some controls to prevent it to pause?