I have a simple system that refreshes a div every few seconds:
$(document).ready(function() {
$("#nownext").load("response.php");
var refreshId = setInterval(function() {
$("#nownext").load('response.php?randval='+ Math.random());
}, 20000);
});
Now, because of what the content is, it is more likely to update on the hour, or at half past. (Though not always). What I'd like to do it make the system refresh MORE often between a few minutes before and after the hour (and half past), just to make it more precise.
Is this possible/how would I do it without stressing out the client's computer too much?
Use setTimeout instead of setInterval so you can dynamically alter the timing of the next interval. I'm not sure what the performance implications of creating and checking the Date() object ever millisec in the "Fast" period would be, but you could always tune that frequency up closer to every second if its an issue.
Since the interval itself is going to be dynamic, you're going to have to use
setTimeout
instead.Something like this (untested):