CODEWITHSUNDEEP
javascriptdate
Mārcis P
Mārcis P

Reputation: 326

how to format date YYYYMMDDmmhhssuuu

I have a 'timestamp' value 20200513134950000 and the format should be YYYYMMDDmmhhssuuu. I can not wrap my head around how to properly format it. I have tried date-fns library and native Date format, but with no luck. Any ideas?

Upvotes: 0

Views: 235

Answers (3)

RobG
RobG

Reputation: 147403

Without any library you can just get the parts and pass them to the Date constructor:

let ts = '20200513134950000';
let [c,y,m,d,H,M,S] = ts.match(/\d\d/g);
console.log(new Date(c+y,--m,d,H,M,S).toString());

Upvotes: 1

Shilly
Shilly

Reputation: 8589

You can extract all the relevant parts from the number with a simple regexp or even by counting numbers. Then the only caveat is that months are zero-based, but apart from that, you can just use the standard Date() constructor.

const timestamp = 20200513134950000;

const UTC_mask = /(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})(\d{3})/;

const [
  year,
  month,
  day,
  hour,
  min,
  sec,
  ms
] = timestamp.toString().match( UTC_mask ).slice( 1 );
      
const datetime = new Date( year, parseInt( month, 10 ) - 1, day, hour, min, sec, ms );

console.log( datetime );

Upvotes: 1

Dhruv Shah
Dhruv Shah

Reputation: 1651

You can try using DayJS. Its a lightweight library and allows you to specify custom parse format for parsing the dates.

const dayjs = require('dayjs');
var customParseFormat = require('dayjs/plugin/customParseFormat')
dayjs.extend(customParseFormat)
console.log(dayjs('20200513134950000', 'YYYYMMDDmmhhssuuu'))

Upvotes: 0

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