[javascript] Moment js get first and last day of current month

How do I get the first and last day and time of the current month in the following format in moment.js:

2016-09-01 00:00

I can get the current date and time like this: moment().format('YYYY-MM-DD h:m') which will output in the above format.

However I need to get the date and time of the first and last day of the current month, any way to do this?

EDIT: My question is different from this one because that asks for a given month that the user already has whereas I am asking for the current month along with asking for a specific format of the date that is not mentioned in the other so called 'duplicate'.

Assuming you are using a Date range Picker to retrieve the dates. You could do something like to to get what you want.

$('#daterange-btn').daterangepicker({
            ranges: {
                'Today': [moment(), moment()],
                'Yesterday': [moment().subtract(1, 'days'), moment().subtract(1, 'days')],
                'Last 7 Days': [moment().subtract(6, 'days'), moment()],
                'Last 30 Days': [moment().subtract(29, 'days'), moment()],
                'This Month': [moment().startOf('month'), moment().endOf('month')],
                'Last Month': [moment().subtract(1, 'month').startOf('month'), moment().subtract(1, 'month').endOf('month')]
            },
            startDate: moment().subtract(29, 'days'),
            endDate: moment()
        }, function (start, end) {
      alert( 'Date is between' + start.format('YYYY-MM-DD h:m') + 'and' + end.format('YYYY-MM-DD h:m')}

I ran into some issues because I wasn't aware that moment().endOf() mutates the input date, so I used this work around.

let thisMoment = moment();
let endOfMonth = moment(thisMoment).endOf('month');
let startOfMonth = moment(thisMoment).startOf('month');

You can do this without moment.js

A way to do this in native Javascript code :

var date = new Date(), y = date.getFullYear(), m = date.getMonth();
var firstDay = new Date(y, m, 1);
var lastDay = new Date(y, m + 1, 0);

firstDay = moment(firstDay).format(yourFormat);
lastDay = moment(lastDay).format(yourFormat);

moment startOf() and endOf() is the answer you are searching for.. For Example:-

moment().startOf('year');    // set to January 1st, 12:00 am this year
moment().startOf('month');   // set to the first of this month, 12:00 am
moment().startOf('week');    // set to the first day of this week, 12:00 am
moment().startOf('day');     // set to 12:00 am today

There would be another way to do this:

var begin = moment().format("YYYY-MM-01");
var end = moment().format("YYYY-MM-") + moment().daysInMonth();

As simple we can use daysInMonth() and endOf()

const firstDay = moment('2016-09-15 00:00', 'YYYY-MM-DD h:m').startOf('month').format('D')
const lastDay = moment('2016-09-15 00:00', 'YYYY-MM-DD h:m').endOf('month').format('D')

First and Last Date of current Month In the moment.js

console.log("current month first date");
    const firstdate = moment().startOf('month').format('DD-MM-YYYY');
console.log(firstdate);

console.log("current month last date");
    const lastdate=moment().endOf('month').format("DD-MM-YYYY"); 
console.log(lastdate);