Convert Date from one format to another format in JavaScript

Question

I have a string of a date in javascript in format #1. I need to convert it to format #2.

The problem starts when one format is "dd/mm/yy" and the other is "mm/dd/yy".

The formats change dynamically and I have the formats as strings, but I need a function like

   Date newDate = convert(currentDate, currentFormatString, newFormatString).

How can I do it?

Answer 1

You should look into momentjs, which is a javascript date/time library. With that, you can easily convert between dates of different format. In your case, it would be:

string newDate = moment(currentDate, currentFormatString).format(newFormatString)

For example, moment("21/10/14", "DD/MM/YY").format("MM/DD/YY") would return "10/21/14"

Answer 2

It seems that you should use the library of query-dateformat git hub for jquery-dateformat
or you can use the normal function like date-time-formate, use the library to config the formate template

Answer 3

You can use the above described answer of momnet.js or the function below for splitting and using it

For using moment.js make sure you enter your old and new format in upper case

function parseDate(strDate) {

    var dateFormat = $('#currentDateFormat').val();

    var str;
    var res;

    var strFormat = dateFormat.split('.');
    if (strFormat.length != 3)
        strFormat = dateFormat.split('/');
    if (strFormat.length != 3)
        strFormat = dateFormat.split('-');

    str = strDate.split('.');
    if (str.length != 3)
        str = strDate.split('/');
    if (str.length != 3)
        str = strDate.split('-');


    if (strFormat[0].substr(0, 1) == 'd' && strFormat[1].substr(0, 1) == 'M' &&             
        strFormat[2].substr(0, 1) == 'y') // for dd MM yyyy
        res = new Date(str[2], str[1], str[0]);

    if (strFormat[0].substr(0, 1) == 'M' && strFormat[1].substr(0, 1) == 'd' &&
        strFormat[2].substr(0, 1) == 'y') // for MM dd yyyy
        res = new Date(str[2], str[0], str[1]);

    if (strFormat[0].substr(0, 1) == 'y' && strFormat[1].substr(0, 1) == 'M' &&
        strFormat[2].substr(0, 1) == 'd')
        res = new Date(str[0], str[1], str[2]);

    if (strFormat[0].substr(0, 1) == 'y' && strFormat[1].substr(0, 1) == 'd' &&         
        strFormat[2].substr(0, 1) == 'M')
        res = new Date(str[0], str[2], str[1]);

    return res;
}