How to get last 2 digits of year from Javascript date [duplicate]

I'm not entirely sure if you want only short representation of the year or whole date, BUT with short representation of the year on it - if so, then I would suggest using toLocaleDateString method:

new Date(2019, 10, 30).toLocaleDateString('pl', {day: 'numeric', month: 'numeric', year: '2-digit'})

It will return you:

"30.11.19"

or if you want to get the short year date only:

new Date(2019, 10, 30).toLocaleDateString('en', {year: '2-digit'})

it will return you:

"19"

new Date() does not work with a single string argument in that format. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date

Easiest way is to call it with 3 arguments (year, month, day). Do note that month is the month index (0 based), so November (11th month) is actually 10th in the format that Date expects.

  new Date(2019, 10, 30).getFullYear() % 100;
  // returns 19;

If you can't do it this way and you simply must work around the string format mentioned, then you can just do

const dateString = '30.11.2019';
const year = dateString.substring(dateString.length-2);

You can get last two digits with the following code:

var strDate = new Date(); // By default Date empty constructor give you Date.now
var shortYear = strDate.getFullYear(); 
// Add this line
var twoDigitYear = shortYear.toString().substr(-2);

Since the string you're using isn't in a format recognized by Date.parse() (more on that here), you need to manually create that Date object.

For example:

const strDate = '30.11.2019';
let [d,m,y] = strDate.split(/\D/);
const date = new Date(y, --m, d);

console.log(date.getFullYear())

You can then use Date.getFullYear() to get the year and extract the last two digits, as you need.

do not need split string, I think. using moment

yarn add moment

const moment = require( 'moment' );

const simpleYear = moment( "30.11.2019", "DD.MM.YYYY" ).format( "YY" );
console.log( "simpleYear = " + simpleYear );

var strDate = "30.11.2019";
var lastdigit = strDate.slice(-2);