.day() 使用 Moment.js 返回错误的日期

Question

I am using Moment.js to parse a string and get the day, month and year separately:

var date = moment("12-25-1995", "MM-DD-YYYY");
var day = date.day();        

However, day is not 25—it's 1. What is the correct API method?

Answer 1

The correct function to use is .date() :

date.date() === 25;

.day() gives you the day of the week. This works similarly to javascript's .getDate() and .getDay() functions on the date object .

If you want to get the month and year, you can use the .month() and .year() functions.

Answer 2

This how to get parts of date:

var date = moment("12-25-1995", "MM-DD-YYYY");

if (date.isValid()) {

    day = date.date(); 
    console.log('day ' + day);

    month = date.month() + 1;
    console.log('month ' + month);

    year = date.year(); 
    console.log('year '+ urlDateMoment.year());

} else {
    console.log('Date is not valid! ');
}

Answer 3

You can use moment().format('DD') to get the day of month.

var date = +moment("12-25-1995", "MM-DD-YYYY").format('DD'); 
// notice the `+` which will convert 
// the returned string to a number.

Good Luck...

Answer 4

.day(), is getting the day number of the week which output values ( 1 - 7 ) starting from Monday.

If the day is

1. Monday will output 1
2. Tuesday will output 2
3. Wednesday will output 3
4. Thursday will output 4
5. Friday will output 5
6. Saturday will output 6
7. Sunday will output 7

To get the day of the month as @David mentioned, you need to use .date() Ex:

const today = moment().date()