JavaScript: get all months between two dates?

Question

I have two date strings like this:

var startDate = '2012-04-01'; var endDate = '2014-11-01'; 

And I want to end up with an array of strings like this:

var dates = ['2012-04-01', '2012-05-01', '2012-06-01' .... '2014-11-01',]; 

So far this is what I've got, but it's pretty ugly:

var startDate = '2012-04-01'; var endDate = '2014-11-01'; var start = new Date(Date.parse(startDate)); var end = new Date(Date.parse(endDate)) var dates = []; for (var i = start.getFullYear(); i < end.getFullYear() + 1; i++) {     dates.push(i + '-' + '-01'); } console.log(dates); 

Is there a better way? JSFiddle.

Answer 1

This should produce the desired output:

function dateRange(startDate, endDate) {   var start      = startDate.split('-');   var end        = endDate.split('-');   var startYear  = parseInt(start[0]);   var endYear    = parseInt(end[0]);   var dates      = [];    for(var i = startYear; i <= endYear; i++) {     var endMonth = i != endYear ? 11 : parseInt(end[1]) - 1;     var startMon = i === startYear ? parseInt(start[1])-1 : 0;     for(var j = startMon; j <= endMonth; j = j > 12 ? j % 12 || 11 : j+1) {       var month = j+1;       var displayMonth = month < 10 ? '0'+month : month;       dates.push([i, displayMonth, '01'].join('-'));     }   }   return dates; } 

Just call it with your existing date format:

dateRange('2013-11-01', '2014-06-01') // ["2013-11-01", "2013-12-01", "2014-01-01", "2014-02-01", "2014-03-01", "2014-04-01", "2014-05-01", "2014-06-01", "2014-07-01", "2014-08-01", "2014-09-01", "2014-10-01", "2014-11-01", "2014-12-01"]