CODEWITHSUNDEEP
javascriptmomentjs
kentor
kentor

Reputation: 18504

Weird ISO formatted Datestring to Javascript Date

I've got a Datestring like this one: 20171010T022902.000Z and I need to create Javascript Date from this string. new Date('20171010T022902.000Z') would return Invalid Date.

I saw that it's possible to use moment.js for this purpose but I am not sure how I would specify the according format for my given example. I found this example from another thread:

var momentDate = moment('1890-09-30T23:59:59+01:16:20', 'YYYY-MM-DDTHH:mm:ss+-HH:mm:ss');
var jsDate = momentDate.toDate();

Question:

How can I create a JavaScript date from a given Datestring in this format: 20171010T022902.000Z (using moment)?

Upvotes: 0

Views: 606

Answers (2)

VincenzoC
VincenzoC

Reputation: 31482

Your input (20171010T022902.000Z) matches known ISO 8601 so you can simply use moment(String) parsing method. In the Supported ISO 8601 strings section of the docs you will find:

20130208T080910.123      # Short date and time up to ms

Then you can use toDate() method

To get a copy of the native Date object that Moment.js wraps

Your code could be like the following

var m = moment('20171010T022902.000Z');
console.log( m.format() );
console.log( m.toDate() );
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>

Note that this code does not shows Deprecation Warning (cited in Bergi's comment) because you input is in ISO 8601 known format. See this guide to know more about this warning.

Moreover "By default, moment parses and displays in local time" as stated here so format() will show the local value for your UTC input (20171010T022902.000Z ends with Z). See moment.utc(), utc() and Local vs UTC vs Offset guide to learn more about moment UTC mode.

Upvotes: 4

Keith
Keith

Reputation: 24181

I think you can do this without moment.js,.

Basically extract the parts you need using regex's capture groups, and then re-arrange into a correct format for new Date to work with.

var dtstr = '20171010T022902.000Z';

var dt = new Date(
  dtstr.replace(/^(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})(\d{2})(\.\d{3}Z)$/,
    "$1-$2-$3T$4:$5:$6$7"));
  
console.log(dt);
console.log(dt.toString());

If you are using moment.js anyway, this should work ->

var dt = moment("20171010T022902.000Z", "YYYYMMDDTHHmmss.SSSSZ");

console.log(dt.toString());
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.19.1/moment.min.js"></script>

Upvotes: 0

Related Questions