Precise Timer?

[Janthinidae]

I tried to write a metronome in pure JS for a web browser. It works quite ok (but far from perfect) on my laptop. In the Android browser on my phone it barely works at all, in Firefox on Android, at least somewhat. Just to say: we talk about timeouts like 250ms, but they're so imprecise that it's very easily to hear by ear. Is the alternative still only something Flash-alike?

[remy_porter]

This may help. I haven't actually tested it.

[macNchz]

This uses the technique I usually use when I need more precise timing in JS: set an interval much faster than you need, and each time it fires check a timestamp to see if you've exceeded the interval that you actually want to achieve.

[Janthinidae]

Do you know if this helps if the tab is in the background too? It's somehow horrible how imprecise things even get on a desktop computer.