Formatting date to new date not working in IE

Question

I currently have the following code:

lastLoginDate = "\/Date(1499994230140+0800)\/";
lastLoginDate = moment(lastLoginDate).format("YYYY-MM-DD hh:mm:ss UTC");
lastLoginDate = new Date(lastLoginDate);

This works in chrome. However when ran in IE, new Date returns invalid date. how do i achieve the same output in IE?

You need the format `Tue Dec 05 16:47:20 CDT 2006` -- [_IE JavaScript date parsing error_](https://stackoverflow.com/questions/3020508/ie-javascript-date-parsing-error) — Mr. Polywhirl, Jul 14 '17 at 11:31
What on earth is `"\/Date(1499994230140+0800)\/"`? How did you end up with that? — str, Jul 14 '17 at 11:45
What API? If you have access, you should change that and not try to somehow parse it. This format makes absolutely no sense to me. — str, Jul 14 '17 at 12:00

score 1 · Accepted Answer · answered Jul 14 '17 at 12:55

1

resolved my issue by changing format to yyyy/mm/dd instead of yyyy-mm-dd

moment(lastLoginDate).format("YYYY/MM/DD hh:mm:ss UTC");

answered Jul 14 '17 at 12:55

edsamiracle

753
3
12
27

Thanks, it helped me – brahmaji tammana Jan 21 '18 at 17:49

score 0 · Answer 2 · answered Jul 14 '17 at 11:32

0

There is no need at all to format and then parse the date again. Just use toDate():

lastLoginDate = moment(lastLoginDate).toDate();

If this does not work, then your lastLoginDate has a wrong format. You can read more about valid formats here.

answered Jul 14 '17 at 11:32

str

42,689
17
109
127

score 0 · Answer 3 · answered Jul 14 '17 at 12:01

You can split the string into the Unix time and the timezone offset by using a regex.

This code below is easy to follow.

const dateRegex = /^\/Date\((\d+)([-+]\d{4})\)\/$/;
const dateFormat = 'YYYY-MM-DD hh:mm:ss Z';
  
let lastLoginDate = "\/Date(1499994230140+0800)\/";
console.log(parseTimestamp(lastLoginDate));

function parseTimestamp(timestamp) { 
  var groups = dateRegex.exec(timestamp);
  var unixTime = Math.floor(parseInt(groups[1], 10) / 1000);
  var timezoneOffset = groups[2];

  return moment.unix(unixTime).utcOffset(timezoneOffset).format(dateFormat);
}

// Output: 2017-07-14 09:03:50 +08:00

.as-console-wrapper { top: 0; max-height: 100% !important; }

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>

You can change the `let` and `const` statement declarations to `var` if it does not work in IE. — Mr. Polywhirl, Jul 14 '17 at 12:03

Formatting date to new date not working in IE

3 Answers3