Develop Reference

Moment JS from yyyy-mm-ddthh:mm:ss to MM-DD-YY mm:ss [duplicate]

I want to parse the following string with moment.js 2014-02-27T10:00:00 and output
day month year (14 march 2014)
I have been reading the docs but without success
http://momentjs.com/docs/#/parsing/now/

I always seem to find myself landing here only to realize that the title and question are not quite aligned.
If you want a moment date from a string:
const myMomentObject = moment(str, 'YYYY-MM-DD')
From moment documentation:
Instead of modifying the native Date.prototype, Moment.js creates a wrapper for the Date object.
If you instead want a javascript Date object from a string:
const myDate = moment(str, 'YYYY-MM-DD').toDate();

You need to use the .format() function.
MM - Month number
MMM - Month word
var date = moment("2014-02-27T10:00:00").format('DD-MM-YYYY');
var dateMonthAsWord = moment("2014-02-27T10:00:00").format('DD-MMM-YYYY');
FIDDLE

No need for moment.js to parse the input since its format is the standard one :
var date = new Date('2014-02-27T10:00:00');
var formatted = moment(date).format('D MMMM YYYY');
http://es5.github.io/#x15.9.1.15

moment was perfect for what I needed. NOTE it ignores the hours and minutes and just does it's thing if you let it. This was perfect for me as my API call brings back the date and time but I only care about the date.
function momentTest() {
var varDate = "2018-01-19 18:05:01.423";
var myDate = moment(varDate,"YYYY-MM-DD").format("DD-MM-YYYY");
var todayDate = moment().format("DD-MM-YYYY");
var yesterdayDate = moment().subtract(1, 'days').format("DD-MM-YYYY");
var tomorrowDate = moment().add(1, 'days').format("DD-MM-YYYY");
alert(todayDate);
if (myDate == todayDate) {
alert("date is today");
} else if (myDate == yesterdayDate) {
alert("date is yesterday");
} else if (myDate == tomorrowDate) {
alert("date is tomorrow");
} else {
alert("It's not today, tomorrow or yesterday!");
}
}

How to change any string date to object date (also with moment.js):
let startDate = "2019-01-16T20:00:00.000";
let endDate = "2019-02-11T20:00:00.000";
let sDate = new Date(startDate);
let eDate = new Date(endDate);
with moment.js:
startDate = moment(sDate);
endDate = moment(eDate);

Maybe try the Intl polyfill for IE8 or the olyfill service ?
or
https://github.com/andyearnshaw/Intl.js/

(getDate() - 1) function is getting the value zero if the current date is 1

My Requirement:
I'm having to fields Start Date and End Date, If the End Date is left empty while saving the record, the End Date Field value is populated with plus 1 year based on the entered from date.
My Issue:
If the Start Date is "9/1/2016" and the End Date is Left Empty means it should automatically populate the End Date value as "8/31/2016" but it returning the End Date value as "9/0/2016" and also i'm getting the following ERROR MESSAGE
Error: JS_EXCEPTION
INVALID_FLD_VALUE You have entered an Invalid Field Value Invalid Date for the following field: custrecord_end_date
CODE:
SCRIPT : CLIENT SCRIPT, EVENT :SaveRecord
function saveRecord(scriptContext) {
var newRecord= scriptContext.currentRecord;
var fromDate = new Date(newRecord.getValue('custrecord_created_date'));
var endDate = newRecord.getValue('custrecord_end_date');
if (endDate == null || endDate == '') {
//getting plus 1 year based on the From Date
tempEndDate = addingPlusYearOfTheCurrentDate(fromDate);
//setting the value to the End Date Field
newRecord.setValue('custrecord_end_date', tempEndDate);
}
}
// Add Plus Year from the Start Date when the End Date is Empty
function addingPlusYearOfTheCurrentDate(fromDate ) {
var date = new Date();
var Month = (fromDate.getMonth() + 1);
var Dates = (fromDate.getDate() - 1);
var Year = (fromDate.getFullYear() + 1);
var last_Day = new Date(Month + '/' + Dates + '/' + Year);
log.debug('last_Day:', last_Day);
return last_Day;
}

Not sure why you expected to be able to subtract 1 from 1 and get anything other than 0, but you can solve this problem by using the Date object's setFullYear() and setDate().
function addingPlusYearOfTheCurrentDate(fromDate) {
var date = new Date(fromDate);
date.setFullYear(date.getFullYear() + 1);
date.setDate(date.getDate() - 1);
return date;
}
console.log(addingPlusYearOfTheCurrentDate(new Date(2015, 10, 1)));

You should use the method nlapiStringToDate() for string to date conversions, as NetSuite gives date field value as string, which you must convert to date, and before you set back date, you must use nlapiSetFieldValue(YOUR_FIELD_ID, nlapiStringToDate(dateObject))
Please see below on suggested usage on reading and setting date fields.
function saveRecord(scriptContext) {
var newRecord = scriptContext.currentRecord;
var fromDate = nlapiStringToDate(newRecord.getValue('custrecord_created_date'));
var endDate = nlapiStringToDate(newRecord.getValue('custrecord_end_date'));
if (endDate == null || endDate == '') {
//getting plus 1 year based on the From Date
tempEndDate = addingPlusYearOfTheCurrentDate(fromDate);
//setting the value to the End Date Field
newRecord.setValue('custrecord_end_date', nlapDateToString(tempEndDate));
}

Parsing strings with the Date constructor (and Date.parse, they are equivalent for parsing) is strongly recommended against since parsing is almost entirely implementation dependent and inconsistent. Manually parse strings with a custom function or use a library.
Adding a year to a Date is fairly simple, but it seems you want the date that is one day prior to the same date next year. So add one year then subtract one day.
// Parse m/d/y format string to a Date and validate the result
function parseMDY(s) {
var b = s.split(/\D/);
var d = new Date(b[2], --b[0], b[1]);
return d && d.getMonth() == b[0]? d : new Date(NaN);
}
// Add 1 year to a Date
function addYear(d) {
if (Object.prototype.toString.call(d) != '[object Date]') return;
d.setFullYear(d.getFullYear() + 1);
d.setDate(d.getDate() -1);
return d;
}
var d = parseMDY('9/1/2016');
console.log(d.toLocaleString())
addYear(d);
console.log(d.toLocaleString())
Note that for 29 February, adding one year gives 1 May, then subtracting one day will give 28 February.

Is this a 1.0 or 2.0 script?
NetSuite's 1.0 API offers a couple date manipulation methods that might be helpful to you here: nlapiAddMonths and nlapiAddDays, as well as the Date-String conversion methods.
Here's an example of what you could do in 1.0
// 1.0 API does not pass scriptContext to saveRecord
function saveRecord() {
// Use nlapiStringToDate instead of raw Date constructor
var fromDate = nlapiStringToDate(nlapiGetFieldValue('custrecord_created_date'));
// Instead of the full extra conditional, just use || as fallback
var endDate = nlapiStringToDate(nlapiGetFieldValue('custrecord_end_date')) ||
calculateEndDate(fromDate);
// setting the value to the End Date Field
nlapiSetFieldValue('custrecord_end_date', nlapiDateToString(endDate));
}
/** #param fromDate {Date} */
function addYear(fromDate) {
return nlapiAddMonths(fromDate, 12);
}
/** #param fromDate {Date} */
function dayBefore(fromDate) {
return nlapiAddDays(fromDate, -1);
}
/** #param startDate {Date} */
function calculateEndDate(startDate) {
// add 1 year first, then subtract one day
return dayBefore(addYear(startDate));
}
If you're using 2.0 just add a comment, and I will try to update the example if I can. If you've got any questions about how this works, feel free to let me know as well.

javascript - compare dates in different formats

I have 2 dates which I need to compare to see if one is greater than the other but they are in different formats and I'm not sure of the best way to compare the 2.
The formats are:
1381308375118 (this is var futureDate)
which is created by
var today = new Date(); today.setHours(0, 0, 0, 0); var futureDate = new Date().setDate(today.getDate() + 56); //56 days in the future...
And the other format is
2013/08/26
Any ideas how I can compare the 2?

Without using a 3rd party library, you can create new Date objects using both those formats, retrieve the number of milliseconds (since midnight Jan 1, 1970) using getTime() and then simply use >:
new Date("2013/08/26").getTime() > new Date(1381308375118).getTime()

I strongly recommend using datejs library.
Thus this can be written in one single line:
Date.today().isAfter(Date.parse('2013/08/26'))

I would make sure that I am comparing the "date" element of each format and exclude any "time" element. Then with both dates converted to milliseconds, simply compare the values. You could do something like this. If dates are equal it returns 0, if the first date is less that the second then return -1, otherwise return 1.
Javascript
function compareDates(milliSeconds, dateString) {
var year,
month,
day,
tempDate1,
tempDate2,
parts;
tempDate1 = new Date(milliSeconds);
year = tempDate1.getFullYear();
month = tempDate1.getDate();
day = tempDate1.getDay();
tempDate1 = new Date(year, month, day).getTime();
parts = dateString.split("/");
tempDate2 = new Date(parts[0], parts[1] - 1, parts[2]).getTime();
if (tempDate1 === tempDate2) {
return 0;
}
if (tempDate1 < tempDate2) {
return -1;
}
return 1;
}
var format1 = 1381308375118,
format2 = "2013/08/26";
console.log(compareDates(format1, format2));
On jsfiddle

Maybe you can use Date.parse("2013/08/26") and compare with former one

Follow these steps to compare dates
Each of your date must to passed through Date object i.e. new Date(yourDate).
Now dates will have same format and these will be comparable
let date1 = new Date()
let date2 = "Jan 1, 2019"
console.log(`Date 1: ${date1}`)
console.log(`Date 2: ${date2}`)
let first_date = new Date(date1)
let second_date = new Date(date2)
// pass each of the date to 'new Date(yourDate)'
// and get the similar format dates
console.log(`first Date: ${first_date}`)
console.log(`second Date: ${second_date}`)
// now these dates are comparable
if(first_date > second_date) {
console.log(`${date2} has been passed`)
}

JavaScript - Get system short date format

Is there any way to get system short date format in JavaScript?
For example whether system's short date is in American format eg. m/d/Y or in european eg. d/m/Y
Please note:
This is not question about formatting date or calculating it based on geolocation, but about getting the format from the OS/system

After a pinch of research I concluded that technically it's not possible to get regional settings -and by this, date format- but you can do several other things. Pick one of these options:a) The already mentioned -and outdated- "toLocaleString()" function:
var myDate = new Date(1950, 01, 21, 22, 23, 24, 225);
var myDateFormat = myDate.toLocaleString();
alert (myDateFormat);
ISSUES:1) You can't "myDateFormat.replace" to get the date mask as month is not stored as "01", "02", etc in the string but as text instead, based on locale (like "February" in English but it's "Φεβρουάριος" in Greek and who knows what in e.g. Klingon).2) Different behavior on different browsers3) Different behavior on different OS and browser versions...b) Use the toISOString() function instead of toLocaleString(). You won't get the locale date mask but get a date from which you can tell where's which part of the date (ie where "month" or "day" is in that string). You can also work with getUTCDate(), getUTCMonth() and getUTCDay() functions. You still can't tell what date format the client uses, but can tell which Year/Month/Day/etc you work with when you grab a date; use the code above to test the functions I mentioned here to see what you can expect.c) Read
Inconsistent behavior of toLocaleString() in different browser article and use the (IMHO great) solution described there

for my case i used a custom date that i know what number is day, what is month and what is year so it can possible with a simple replace statement.
let customDate = new Date(2222, 11, 18);
let strDate = customDate.toLocaleDateString();
let format = strDate
.replace("12", "MM")
.replace("18", "DD")
.replace("2222", "yyyy");

It is not possible. You can get culture from user browser and use some js libraries to convert to correct date format. http://code.google.com/p/datejs/

I made a function to determine the client date format. The function determine
the date format separator, and also determine the 1st, 2nd and third part of
the date format.
getDateFormat(){
// initialize date value "31st January 2019"
var my_date = new Date(2019,0,31);
console.log(my_date.toLocaleDateString());
// Initialize variables
var separator="";
var first="";
var second="";
var third="";
var date_parts = [];
// get separator : "-", "/" or " ", format based on toLocaleDateString function
if (my_date.toLocaleDateString().split("-").length==3){
separator = " - ";
date_parts = my_date.toLocaleDateString().split("-");
}
if (my_date.toLocaleDateString().split("/").length == 3) {
separator = " / ";
date_parts = my_date.toLocaleDateString().split("/");
}
if (my_date.toLocaleDateString().split(" ").length == 3) {
separator = " ";
date_parts = my_date.toLocaleDateString().split(" ");
}
// get first part
if (date_parts[0]==2019){
first ="yyyy";
} else if (date_parts[0] == 31){
first = "dd";
} else{
if (date_parts[0].length<=2){
first ="mm";
}
else{
first="mmm";
}
}
// get second part
if (date_parts[1] == 2019) {
second = "yyyy";
} else if (date_parts[1] == 31) {
second = "dd";
} else {
if (date_parts[1].length <= 2) {
second = "mm";
}
else {
second = "mmm";
}
}
// get third part
if (date_parts[2] == 2019) {
third = "yyyy";
} else if (date_parts[2] == 31) {
third = "dd";
} else {
if (date_parts[2].length <= 2) {
third = "mm";
}
else {
third = "mmm";
}
}
// assembly
var format = first + separator + second + separator + third;
console.log(format);
return format;
}

I've created a workaround to determine which format the user's browser is using.
This is in C# but the logic is the same:
Here are the steps:
First try to convert the user's browser date into American format (mm-dd-yyyy). Convert.ToDateTime is using the American date format.
If that fails it means the user is using European format (dd-mm-yyyy).
However, this will only cover the day 13 to 31 because this is not a valid month.
If the conversion is successful, do another check to determine if the converted date is between the current UTC day + 1 day (to cover UTC+14) and current UTC day - 1 day (to cover UTC-12).
https://www.timeanddate.com/time/current-number-time-zones.html
If the converted date is out of the current date range, it means the user's browser is using European format (dd-mm-yyyy) and you can convert it to American format if you want.
string localeDateString = "01/11/2020"; // e.g. input is using European format (dd-mm-yyyy)
var localeDate = new DateTime();
try
{
localeDate = Convert.ToDateTime(localeDateString);
//var checkTheFormatOfDateInput = localeDate.ToLongDateString();
var currentDateTime = DateTime.UtcNow;
//var currentDateTime = Convert.ToDateTime("11/01/2020");
//var checkTheFormatOfCurrentDate = Convert.ToDateTime("11/01/2020").ToLongDateString();
var currentDateTimePositive = currentDateTime.AddDays(1);
var currentDateTimeNegative = currentDateTime.AddDays(-1);
var outOfCurrentDateRange = !(localeDate.Ticks > currentDateTimeNegative.Ticks && localeDate.Ticks < currentDateTimePositive.Ticks);
if (outOfCurrentDateRange)
{
localeDate = DateTime.ParseExact(localeDateString, "dd/MM/yyyy", CultureInfo.InvariantCulture);
}
}
catch
{
localeDate = DateTime.ParseExact(localeDateString, "dd/MM/yyyy", CultureInfo.InvariantCulture);
}
//var checkTheEndResultFormat = localeDate.ToLongDateString();
Below is the clean code wrapped in a method:
private DateTime ConvertAmericanOrEuropeanDateFormatToAmericanDateFormat(string localeDateString)
{
var localeDate = new DateTime();
try
{
localeDate = Convert.ToDateTime(localeDateString);
var currentDateTime = DateTime.UtcNow;
var currentDateTimePositive = currentDateTime.AddDays(1);
var currentDateTimeNegative = currentDateTime.AddDays(-1);
var outOfCurrentDateRange = !(localeDate.Ticks > currentDateTimeNegative.Ticks && localeDate.Ticks < currentDateTimePositive.Ticks);
if (outOfCurrentDateRange)
{
localeDate = DateTime.ParseExact(localeDateString, "dd/MM/yyyy", CultureInfo.InvariantCulture);
}
}
catch
{
localeDate = DateTime.ParseExact(localeDateString, "dd/MM/yyyy", CultureInfo.InvariantCulture);
}
return localeDate;
}

A very good but lengthy answer can here found here: https://stackoverflow.com/a/9893752/2484903
A shorter one here:
let customDate = new Date(2222, 3, 8);
let strDate = customDate.toLocaleDateString();
let format = strDate
.replace("04", "MM")
.replace("4", "M")
.replace("08", "dd")
.replace("8", "d")
.replace("2222", "yyyy")
.replace("22", "yy");
console.log(format);
We create a date object of a known date and then parse the outcome.
First we look for "04" (which corresponds to 3 from the date definition); that would be the two digit month format MM. If not found, it must be the single digit format M. Afterwards do the same for day and year.

It should do the job...
function getSystemDateLocale(){
let testDate = (new Date('2000-1-30')).toLocaleDateString()
if (testDate.substring(0,2) == '30') return 'EU'
else return 'US'
}

Use Date.CultureInfo.formatPatterns.shortDate

Date Parsing and Validation in JavaScript

How would I achieve the pseudo-code below in JavaScript? I want to include the date check in the second code excerpt, where txtDate is for the BilledDate.
If ABS(billeddate – getdate) > 31 then yesno “The date you have entered is more than a month from today, Are you sure the date is correct,”.
if (txtDate && txtDate.value == "")
{
txtDate.focus();
alert("Please enter a date in the 'Date' field.")
return false;
}

Generally speaking you work with Date-objects in javascript, and these should be constructed with the following syntax:
var myDate = new Date(yearno, monthno-1, dayno);
//you could put hour, minute, second and milliseconds in this too
Beware, the month-part is an index, so january is 0, february is 1 and december is 11 !-)
Then you can pull out anything you want, the .getTime() thing returns number of milliseconds since start of Unix-age, 1/1 1970 00:00, så this value you could subtract and then look if that value is greater than what you want:
//today (right now !-) can be constructed by an empty constructor
var today = new Date();
var olddate = new Date(2008,9,2);
var diff = today.getTime() - olddate.getTime();
var diffInDays = diff/(1000*60*60*24);//24 hours of 60 minutes of 60 second of 1000 milliseconds
alert(diffInDays);
This will return a decimal number, so probably you'll want to look at the integer-value:
alert(Math.floor(diffInDays));

To get the date difference in days in plain JavaScript, you can do it like this:
var billeddate = Date.parse("2008/10/27");
var getdate = Date.parse("2008/09/25");
var differenceInDays = (billeddate - getdate)/(1000*60*60*24)
However if you want to get more control in your date manipulation I suggest you to use a date library, I like DateJS, it's really good to parse and manipulate dates in many formats, and it's really syntactic sugar:
// What date is next thrusday?
Date.today().next().thursday();
//or
Date.parse('next thursday');
// Add 3 days to Today
Date.today().add(3).days();
// Is today Friday?
Date.today().is().friday();
// Number fun
(3).days().ago();

You can use this to check for valid date
function IsDate(testValue) {
var returnValue = false;
var testDate;
try {
testDate = new Date(testValue);
if (!isNaN(testDate)) {
returnValue = true;
}
else {
returnValue = false;
}
}
catch (e) {
returnValue = false;
}
return returnValue;
}
And this is how you can manipulate JS dates. You basically create a date object of now (getDate), add 31 days and compare it to the date entered
function IsMoreThan31Days(dateToTest) {
if(IsDate(futureDate)) {
var futureDateObj = new Date();
var enteredDateObj = new Date(dateToTest);
futureDateObj.setDate(futureDateObj.getDate() + 31); //sets to 31 days from now.
//adds hours and minutes to dateToTest so that the test for 31 days is more accurate.
enteredDateObj.setHours(futureDateObj.getHours());
enteredDateObj.setMinutes(futureDateObj.getMinutes() + 1);
if(enteredDateObj >= futureDateObj) {
return true;
}
else {
return false;
}
}
}

Hello and good day for everyone
You can try Refular Expressions to parse and validate a date format
here is an URL yoy can watch some samples and how to use
http://www.javascriptkit.com/jsref/regexp.shtml
A very very simple pattern would be: \d{2}/\d{2}/\d{4}
for MM/dd/yyyy or dd/MM/yyyy
With no more....
bye bye