setInterval By the minute On the minute

Question

To the javascript enthusiasts,

how would you program a setTimeOut (or setInterval) handle to fire by the minute on the minute. So for example, if it is the 51 second of the current time, then fire it in 9 seconds, if it is the 14th second then fire it in 46 seconds

thanks

Answer 1

var seconds = (new Date()).getSeconds();

Use 60-seconds as the timeout time. Granted, setTimeout lets you specify milliseconds, which means you should also be checking milliseconds, but this will give you "close enough" for most applications. If anything, this should make you overshoot the minute some fraction of a second, but it's better to overshoot than undershoot. Undershooting would cause catastrophic failure with this method.

Answer 2

var date = new Date();

setTimeout(function() {
    setInterval(myFunction, 60000);
    myFunction();
}, (60 - date.getSeconds()) * 1000);

Obviously this isn't 100% precise, but for the majority of cases it should be sufficient.

Answer 3

var d = new Date();
var milisecondsUntilMinuteChanges = 60000 - d.getMilliseconds() - (1000 * d.getSeconds());

Answer 4

var nextTick = function() {
  return 60000 - (new Date().getTime() % 60000);
}, timerFunction = function() {
  // do stuff
  // do stuff
  // do stuff
  setTimeout(timerFunction, nextTick());
};
var timeout = setTimeout(timerFunction, nextTick());

Answer 5

function waitForNewMinute() {
    if (new Date().getSeconds()>1) {
        setTimeout(waitForNewMinute, 500);
    } else {
        setInterval(doMyThing,60000);
    } 
}

waitForNewMinute();