CODEWITHSUNDEEP
javascriptdate
MikO
MikO

Reputation: 18741

Error creating Date() in Javascript

I'm totally new to Javascript, and I'm getting trouble creating a Date from milliseconds.

I have this code:

function (result) {

  alert("Retreived millis = " + result.created);
  //Prints "Retrieved millis = 1362927649000"

  var date = new Date(result.created);
  alert("Created Date = " + date);
  //Prints "Created Date = Invalid Date"

  var current = new Date();
  var currentDate = new Date(current.getTime());
  alert("Current Date = " + currentDate);
  //Prints "Current Date = Sun Apr 14 2013 12:56:51 GMT+0100"
}

The last alert proves that the creation of Date is working, but I don't understand why the first Date is not being created correctly, because the retrieved millis are correct... and as far as I understand in Javascript there're not datatypes, so it can't fail because the retrieved millis are a string or a long, right?

Upvotes: 1

Views: 93

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1073968

I suspect result.created is a string. Since the Date constructor accepts strings but expects them to be in a different format than that, it fails. (E.g., new Date("1362927649000") results in an invalid date, but new Date(1362927649000) gives us Sun Mar 10 2013 15:00:49 GMT+0000 (GMT).)

This should sort it (by converting to a number first, so the constructor knows it's dealing with milliseconds since The Epoch):

var date = new Date(parseInt(result.created, 10));

Upvotes: 2

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