CODEWITHSUNDEEP
javascripttime
jtrick
jtrick

Reputation: 1369

Milliseconds passed since last minute in javascript

I'm probably just tired and not thinking clearly, but can someone give a concise way of getting the number of milliseconds passed since the last minute using javascript?

Something like Date.getSeconds(), but that would return milliseconds.

Although I could just do (Date.getSeconds()*1000) + Date.getMilliseconds(), this just seems really awkward and like there has to be a better way.

Thanks!

Upvotes: 2

Views: 1199

Answers (2)

notacouch
notacouch

Reputation: 3655

Depends what you're trying to do.

The difference between now and 1 minute ago in milliseconds should always be 60000 milliseconds. o_O

As Jan said Date.now() will return the current timestamp in milliseconds.

But it seems you might be looking for the getTime method, e.g.: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Date/getTime

// note the keyword "new" below
var date_instance = new Date();

// separate example in case you're managing Date()'s and not the method,
// who knows, just an example
var timestamp     = date_instance.getTime();

var minute_before_timestamp = function(ts){ 
  return ts - 60000;
};
console.log(minute_before_timestamp(timestamp));
console.log(minute_before_timestamp(date_instance.getTime()); // always same as above!

// or use the current time
console.log(minute_before_timestamp(Date.now()));
console.log(minute_before_timestamp(new Date().getTime()));

(another useful link: http://www.epochconverter.com/)

Upvotes: 6

J. K.
J. K.

Reputation: 8368

What about…

Date.now() % 60000

Date.now returns the current UNIX timestamp in ms.

To clarify what's happening there, the % operator is called modulo and what it does is that it gives you the remainder from dividing the first number by the other one.

An example can be:

20 % 7 === 6
13 % 7 === 6
 6 % 7 === 6

…because…

20 / 7 = 2 + 6 / 7
13 / 7 = 1 + 6 / 7
 6 / 7 = 0 + 6 / 7

(note the remainder 6)

Upvotes: 5

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