how to get year last 2 digit from date in javascript code example

Example 1: get only last 2 digit of year in javascript

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);

Example 2: get last two digits of year javascript

maskDate(date) {
    // console.log(date);
    var dateVar = new Date(date);
    // console.log("XX/XX/"+ dateVar.getFullYear().toString().substr(-2));
    return "XX/XX/"+ dateVar.getFullYear().toString().substr(-2);
 }