Moment.js how do you get the current Quarter and previous three quarters along with year?

javascript angularjs date datetime momentjs

const moment = require('moment');let fmt      = '[q]Q-Y';let quarters = [  moment().format(fmt),  moment().subtract(1, 'Q').format(fmt),  moment().subtract(2, 'Q').format(fmt),  moment().subtract(3, 'Q').format(fmt)];// quarters = [ 'q3-2016', 'q2-2016', 'q1-2016', 'q4-2015' ]

let quarters = [ 0, 1, 2, 3 ].map(i =>   moment().subtract(i, 'Q').format('[q]Q-Y'))

javascript angularjs date datetime momentjs

var d = new Date();//current date    var y = d.getFullYear();//year as 4 digit number    var m = d.getMonth();//0 to 11 which actually is helpful here    var q = Math.floor(m / 3) + 1;//month div 3 + 1    var s = "";//this holds the result    for (var i = 0; i < 4; i++) {        s += "q" + q + "-" + y;        if (i < 3) {            s += " ";//another entry coming so put in space            q--;//and roll back quarter        }        if (q == 0) {            q = 4;//we were in q1 so predecessor is q4            y--;//and the year is one less        }    };console.log(s);