Develop Reference

How to create Google calendar link date in Javascript 2022?

In 2022 the create Google calendar event link looks like this:
https://calendar.google.com/calendar/u/0/r/eventedit?sf=true&output=xml&text=sometext&location=somelocation&details=somedetails&dates=20220418T013000Z/20220416T020000Z
How do you formate such date in Javascript?
const formatDate = (date) => {
???
};
const myDate = new Date();
const myFormattedDate = formatDate(myDate);
console.log(myFormattedDate)
expecting output:
20220418T013000Z
Any nice looking and easy solution (rather than getHours(),getMinutes(),etc.)?

JS Dates have an inbuilt .toISOString() method which gets the right format, then just remove special characters:
let date = new Date();
let isoDate = date.toISOString()
let formattedDate = isoDate.replace(/[^\w\s]/gi, '');
console.log(formattedDate)

Getting 'NaN' while trying to convert a string of date to milliseconds [duplicate]

This question already has answers here:
Why does Date.parse give incorrect results?
(11 answers)
Closed 2 years ago.
Tried this:
1.
const today = new Date('28.08.2020');
const milliseconds = today.getTime();
const today = Date.parse("28.08.2020")
var today = new Date('28.08.2020');
var milliseconds = today.getMilliseconds();
Getting NaN while trying to convert a string of date to milliseconds

Better to change date format to YYYY-MM-DD as suggested in other answer
Or you can do something like this
var from = '28.08.2020'.split(".");
var today = new Date(from[2], from[1] - 1, from[0]);
const milliseconds = today.getTime();
console.log(milliseconds);

You use the incorrect format. If you get the date from backend you should convert it.
const date = '28.08.2020';
const [day, month, year] = date.split('.');
const validDate = new Date();
validDate.setFullYear(year);
validDate.setDate(day);
validDate.setMonth(month);
// or just
const validDate2 = new Date(year, month, day);
const milliseconds = validDate.getTime();
const milliseconds2 = validDate2.getTime();
console.log(milliseconds)
console.log(milliseconds2)
After this conversion you can use the date as you want

Assuming that you do not want to manually parse the string, you could try to use moment library, which allows one to provide custom dateString patterns used for parsing the date, like demonstrated below
const dateString = '28.08.2020';
const date = moment(dateString, "DD.MM.YYYY");
console.log("date", date); // displayed zulu time might be different than your local timezone
console.log("milliseconds", date.valueOf());
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.27.0/moment.min.js"></script>
Please take a note that moment will accept the date in your local timezone, which may pose some issues. If you want to make up for it, you should look up moment-timezone library

Oh, in that case you can change the imput to the "yyyy-mm-dd", is that a posibility?
const date = '28.08.2020';
let dateFromat = date.split('.');
dateFromat = `${dateFromat[2]}-${dateFromat[1]}-${dateFromat[0]}`;
const today = new Date(dateFromat);
const milliseconds = today.getTime();
output: 1598572800000

the dating format is wrong.
new Date('2020-08-28') should work

Change format date in JavaScript

I want to change the format in JavaScript, to be Year-month-day
I used this code to get 3 months before, but the format that was generated became like this 9/19/2019.
This my code:
var d = new Date();
d.setMonth(d.getMonth() - 3);
var x = d.toLocaleDateString();
console.log(x);

You can get Year, Month and Date and use string interpolation like below
var d = new Date();
d.setMonth(d.getMonth() - 3);
var formattedDate = `${d.getFullYear()}-${(d.getMonth() + 1)}-${d.getDate()}`;
console.log(formattedDate);

You can use momentjs, a lightweight and handy library for this purpose:
var d = moment(new Date()).subtract(3, 'months').format('dd-MMM-yyyy);

var x = d.toISOString().substring(0,10);
console.log(x);
//it will give you the format of y-m-d

You are using the toLocaleDateString() which will format to the result you received which is expected.
Reference Mozilla's Docs on Date() to get the right function for you there :)
Most instances you are able to just piece it together yourself similar to:
const date = `${date.getYear()}/${date.getMonth()}/${date.getDay()}`;
It's not a nice solution but there are a lot of restrictions with OOTB Date()

Remove Seconds/ Milliseconds from Date convert to ISO String

I have a date object that I want to
remove the miliseconds/or set to 0
remove the seconds/or set to 0
Convert to ISO string
For example:
var date = new Date();
//Wed Mar 02 2016 16:54:13 GMT-0500 (EST)
var stringDate = moment(date).toISOString();
//2016-03-02T21:54:13.537Z
But what I really want in the end is
stringDate = '2016-03-02T21:54:00.000Z'

There is no need for a library, simply set the seconds and milliseconds to zero and use the built–in toISOString method:
var d = new Date();
d.setSeconds(0,0);
document.write(d.toISOString());
Note: toISOString is not supported by IE 8 and lower, there is a pollyfil on MDN.

While this is easily solvable with plain JavaScript (see RobG's answer), I wanted to show you the Moment.js solution since you tagged your questions as "momentjs":
moment().seconds(0).milliseconds(0).toISOString();
This gives you the current datetime, without seconds or milliseconds.
Working example: http://jsbin.com/bemalapuyi/edit?html,js,output
From the docs: http://momentjs.com/docs/#/get-set/

A non-library regex to do this:
new Date().toISOString().replace(/.\d+Z$/g, "Z");
This would simply trim down the unnecessary part. Rounding isn't expected with this.

A bit late here but now you can:
var date = new Date();
this obj has:
date.setMilliseconds(0);
and
date.setSeconds(0);
then call toISOString() as you do and you will be fine.
No moment or others deps.

Pure javascript solutions to trim off seconds and milliseconds (that is remove, not just set to 0). JSPerf says the second funcion is faster.
function getISOStringWithoutSecsAndMillisecs1(date) {
const dateAndTime = date.toISOString().split('T')
const time = dateAndTime[1].split(':')
return dateAndTime[0]+'T'+time[0]+':'+time[1]
}
console.log(getISOStringWithoutSecsAndMillisecs1(new Date()))
function getISOStringWithoutSecsAndMillisecs2(date) {
const dStr = date.toISOString()
return dStr.substring(0, dStr.indexOf(':', dStr.indexOf(':')+1))
}
console.log(getISOStringWithoutSecsAndMillisecs2(new Date()))

This version works for me (without using an external library):
var now = new Date();
now.setSeconds(0, 0);
var stamp = now.toISOString().replace(/T/, " ").replace(/:00.000Z/, "");
produces strings like
2020-07-25 17:45
If you want local time instead, use this variant:
var now = new Date();
now.setSeconds(0, 0);
var isoNow = new Date(now.getTime() - now.getTimezoneOffset() * 60000).toISOString();
var stamp = isoNow.replace(/T/, " ").replace(/:00.000Z/, "");

Luxon could be your friend
You could set the milliseconds to 0 and then suppress the milliseconds using suppressMilliseconds with Luxon.
DateTime.now().toUTC().set({ millisecond: 0 }).toISO({
suppressMilliseconds: true,
includeOffset: true,
format: 'extended',
}),
leads to e.g.
2022-05-06T14:17:26Z

You can use the startOf() method within moment.js to achieve what you want.
Here's an example:
var date = new Date();
var stringDateFull = moment(date).toISOString();
var stringDateMinuteStart = moment(date).startOf("minute").toISOString();
$("#fullDate").text(stringDateFull);
$("#startOfMinute").text(stringDateMinuteStart);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.11.2/moment.js"></script>
<p>Full date: <span id="fullDate"></span></p>
<p>Date with cleared out seconds: <span id="startOfMinute"></span></p>

let date = new Date();
date = new Date(date.getFullYear(), date.getMonth(), date.getDate());
I hope this works!!

To remove the seconds and milliseconds values this works for me:
const date = moment()
// Remove milliseconds
console.log(moment.utc(date).format('YYYY-MM-DDTHH:mm:ss[Z]'))
// Remove seconds and milliseconds
console.log(moment.utc(date).format('YYYY-MM-DDTHH:mm[Z]'))

We can do it using plain JS aswell but working with libraries will help you if you are working with more functionalities/checks.
You can use the moment npm module and remove the milliseconds using the split Fn.
const moment = require('moment')
const currentDate = `${moment().toISOString().split('.')[0]}Z`;
console.log(currentDate)
Refer working example here:
https://repl.it/repls/UnfinishedNormalBlock

In case for no luck just try this code
It is commonly used format in datetime in the SQL and PHP
e.g.
2022-12-25 19:13:55
console.log(new Date().toISOString().replace(/^([^T]+)T([^\.]+)(.+)/, "$1 $2") )

Convert datetime object into specific string Javascript

I have a date in the format dd.MM.yyyy HH:mm, for example 31.01.2014 11:24. How can I obtain, in javascript, the string "/Date(1391160281569)/"?

Here is an approach
var date = "31.01.2014 11:24";
var sp1 = date.split(/[:. ]/);
var newDate = new Date(sp1[2], (+sp1[1] - 1), sp1[0], sp1[3], sp1[4]);
var milliSeconds = newDate.getTime();
var urFormat = "/Date(" + milliSeconds + ")/";
alert(urFormat)
JSFiddle

I took me a while but i got this:
var theStringVersion = "/Date("+$.now()+")/";
Of course, for a real date, i would have to get the timestamp for it.