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 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 2

First, let's make sure we know how much time do we have until the next minute:

var toExactMinute = 60000 - (new Date().getTime() % 60000);

Now, if you want to work with setTimeout, then

setTimeout(yourfunction, toExactMinute);

If you want to do a setInterval:

setTimeout(function() {
    setInterval(yourFunction, 60000);
    yourFunction();
}, toExactMinute);