I am using moment.js to compare two dates.
const somedayMom = moment(new Date(event.target.value)); // '2021-12-31'
const todayMom = moment();
if (moment(somedayMom).isSameOrAfter(todayMom)) {
} else {
}
Now from input I am getting '2021-12-31' and today is 31st December, so it should fall in if() block, but it falls into else part. What I am doing wrong here. please help
Use .format to include only year, month and day.
if (moment(somedayMom.format('YYYY-MM-DD')).isSameOrAfter(todayMom.format('YYYY-MM-DD'))) {
}
else {
}
PS. Formatting the first moment would be unneccessary in your scenaro if event.target.value returns a right string.
I wrote a simple piece of code to validate the format of a date.
The format of the date in my case is d/m/y
List of tests that I run successfully
10/12/2019 DATE OK
aa/12/2019 DATE KO
10-12-2019 DATE KO
But there is this case that surprises me:
32/12/2019 DATE OK
Why does this happen?
Do I need to add controls on the range of days and months?
$value = '32-12-2019';
$checkDate = \DateTime::createFromFormat('d/m/Y', $value);
if ($checkDate) {
print("DATE OK");
} else {
print("DATE KO");
}
I'm using
public static function validateDate($date, $format = 'Y-m-d')
{
$d = DateTime::createFromFormat($format, $date);
return $d && $d->format($format) === $date;
}
It validates correctness of date and required format
I am trying to use datetimepicker and I have these functions to override date formatting. In other places we use momentjs for date time formatting.
There is my plunker example.
Date.parseDate = function (input, format) {
return moment(input, format).toDate();
};
Date.prototype.dateFormat = function (format) {
return moment(this).format(format);
};
Use momentjs formats for datetimepicker:
format: "DD/MM/YYYY H:mm:ss",
formatTime: 'H:mm',
formatDate: 'DD/MM/YYYY',
But when using moment the "highlighted days" function does not work.
How to make that "highlighted days" function were working?
Found solution:
$(document).ready(function() {
var myFormatter = {
parseDate: function(vDate, vFormat) {
return moment(vDate, vFormat).toDate();
},
guessDate: function(vDateStr, vFormat){
return moment(vDateStr, vFormat).toDate();
},
parseFormat: function(vChar, vDate){
return vDate; // date string (I guess)
},
formatDate: function(vChar, vDate) {
return moment(vChar).format(vDate);
},
};
jQuery.datetimepicker.**setDateFormatter**(myFormatter);
jQuery('#datetimepicker').datetimepicker({
timepicker: true,
// 'd/m/y'format is requared for datetimepicker days HIGHLIGHT function to work!!!
//Date, time formating: http://php.net/manual/en/function.date.php
step: 15,
/*
// momentJs formating
format: "d/m/Y H:i:s",
formatTime: "H:i",
formatDate: "d/m/Y",
*/
format: "DD/MM/YYYY H:mm:ss",
formatTime: 'H:mm',
formatDate: 'DD/MM/YYYY', //I need to use this format, but it works only when using "d/m/Y" - so somewhere the php date formater is still used..
highlightedDates: [
"01/09/2016,,xdsoft_highlighted_mint",
"02/09/2016,,xdsoft_highlighted_mint",
"03/09/2016,,xdsoft_highlighted_mint",
"06.09/2016",
"07.09.2016",
"08.09.2016",
"12.09.2016,Christmas Eve,xdsoft_highlighted_mint",
"13.09.2016,Christmas Day,xdsoft_highlighted_mint",
"14.09.2016,Christmas Day,xdsoft_highlighted_mint",
"26.09.2016,,xdsoft_highlighted_mint"
]
});
There is working plunker example
The main issues are is my case is browserify/gulp modules concatenation.. And that datetimepicker is undefined under jquery...
So trying to change building to WebPack....
MomentJS has option "referanceTime" - http://momentjs.com/docs/#/displaying/calendar-time/ and it displays datetime like this Last Monday 2:30 AM
Problem is when I have date without time - it displays Last Monday 0:00 AM - how get rid of time when date hasn't got it?
Very similar to my answer here but slightly more advanced.
I believe the only way to customize calendar time is by using a custom locale. In your case, you need to use a custom function.
Here's a somewhat complex, but complete way to do it:
// Factory-type function that returns a function.
// Used to set argument (fstr) without using `bind` (since bind changes `this`)
var stripZeroTime = function (fstr) {
return function () {
if (this.format("H:mm:ss") === "0:00:00") { // if midnight
return fstr.replace("LT", "") //remove time
.replace("at", "") //remove at
.replace(/\s+/g, ' ').trim(); //strip extra spaces
}
return fstr;
}
}
moment.locale('en-cust', {
calendar: {
lastDay: stripZeroTime('[Yesterday at] LT'), // Default format strings
sameDay: stripZeroTime('[Today at] LT'),
nextDay: stripZeroTime('[Tomorrow at] LT'),
lastWeek: stripZeroTime('[last] dddd [at] LT'),
nextWeek: stripZeroTime('dddd [at] LT'),
sameElse: stripZeroTime('L')
}
});
Demo with test cases
A simpler way would be to just strip off the 0:00:00 when it's midnight.
function stripMidnight(m){
if(m.format("H:mm:ss") === "0:00:00"){
return m.calendar().replace("0:00:00","");
}else{
return m.calendar();
}
}
Since 2.10.5 we can define our own render engine by invocation (second parameter of calendar function) - http://momentjs.com/docs/#/displaying/calendar-time/
But now we can use only strings not function to define pattern
I am trying to use momentjs to check if a given date is today or in the future.
This is what I have so far:
<script type="text/javascript" src="http://momentjs.com/downloads/moment.min.js"></script>
<script type="text/javascript">
var SpecialToDate = '31/01/2014'; // DD/MM/YYYY
var SpecialTo = moment(SpecialToDate, "DD/MM/YYYY");
if (moment().diff(SpecialTo) > 0) {
alert('date is today or in future');
} else {
alert('date is in the past');
}
</script>
The code is evaluating my date (31st of Jan 2014) as a date in past.
Any idea what I am doing wrong?
You can use the isSame function:
var iscurrentDate = startTime.isSame(new Date(), "day");
if(iscurrentDate) {
}
After reading the documentation: http://momentjs.com/docs/#/displaying/difference/, you have to consider the diff function like a minus operator.
// today < future (31/01/2014)
today.diff(future) // today - future < 0
future.diff(today) // future - today > 0
Therefore, you have to reverse your condition.
If you want to check that all is fine, you can add an extra parameter to the function:
moment().diff(SpecialTo, 'days') // -8 (days)
Since no one seems to have mentioned it yet, the simplest way to check if a Moment date object is in the past:
momentObj.isBefore()
Or in the future:
momentObj.isAfter()
Just leave the args blank -- that'll default to now.
There's also isSameOrAfter and isSameOrBefore.
N.B. this factors in time. If you only care about the day, see Dipendu's answer.
// Returns true if it is today or false if it's not
moment(SpecialToDate).isSame(moment(), 'day');
You can use the isAfter() query function of momentjs:
Check if a moment is after another moment.
moment('2010-10-20').isAfter('2010-10-19'); // true
If you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.
moment('2010-10-20').isAfter('2010-01-01', 'year'); // false
moment('2010-10-20').isAfter('2009-12-31', 'year'); // true
http://momentjs.com/docs/#/query/is-after/
Update
moment().isSame('2010-02-01', 'day'); // Return true if we are the 2010-02-01
I have since found the isSame function, which in I believe is the correct function to use for figuring out if a date is today.
Original answer
Just in case someone else needs this, just do this:
const isToday = moment(0, "HH").diff(date, "days") == 0;
or if you want a function:
isToday = date => moment(0,"HH").diff(date, "days") == 0;
Where date is the date you want to check for.
Explanation
moment(0, "HH") returns today's day at midnight.
date1.diff(date2, "days") returns the number of days between the date1 and date2.
invert isBefore method of moment to check if a date is same as today or in future like this:
!moment(yourDate).isBefore(moment(), "day");
To check if it is today:
If we compare two dates which contain also the time information isSame will obviously fail. diff will fail in case that the two dates span over the new day:
var date1 = moment("01.01.2016 23:59:00", "DD.MM.YYYY HH.mm.ss");
var date2 = moment("02.01.2016 00:01:00", "DD.MM.YYYY HH.mm.ss");
var diff = date2.diff(date1); // 2seconds
I think the best way, even if it is not quick and short, is the following:
var isSame = date1.date() == date2.date() && date1.month() == date2.month() && date1.year() == date2.year()
To check if it is in the future:
As suggested also by other users, the diff method works.
var isFuture = now.diff(anotherDate) < 0
If you only need to know which one is bigger, you can also compare them directly:
var SpecialToDate = '31/01/2014'; // DD/MM/YYYY
var SpecialTo = moment(SpecialToDate, "DD/MM/YYYY");
if (moment() > SpecialTo) {
alert('date is today or in future');
} else {
alert('date is in the past');
}
Hope this helps!
Use the simplest one to check for future date
if(moment().diff(yourDate) >= 0)
alert ("Past or current date");
else
alert("It is a future date");
if firstDate is same or after(future) secondDate return true else return false. Toda is firstDate = new Date();
static isFirstDateSameOrAfterSecondDate(firstDate: Date, secondDate: Date): boolean {
var date1 = moment(firstDate);
var date2 = moment(secondDate);
if(date1 && date2){
return date1.isSameOrBefore(date2,'day');
}
return false;
}
There is isSame, isBefore and isAfter for day compare moment example;
static isFirstDateSameSecondDate(firstDate: Date, secondDate: Date): boolean {
var date1 = moment(firstDate);
var date2 = moment(secondDate);
if (date1 && date2) {
return date1.isSame(date2,'day');
}
return false;
}
static isFirstDateAfterSecondDate(firstDate: Date, secondDate: Date): boolean {
var date1 = moment(firstDate);
var date2 = moment(secondDate);
if(date1 && date2){
return date1.isAfter(date2,'day');
}
return false;
}
static isFirstDateBeforeSecondDate(firstDate: Date, secondDate: Date): boolean {
var date1 = moment(firstDate);
var date2 = moment(secondDate);
if(date1 && date2){
return date1.isBefore(date2,'day');
}
return false;
}
I wrote functions that check if a date of Moment type is a Day that Passed or not, as functional and self-descriptive functions.
Maybe it is could to help someone.
function isItBeforeToday(MomentDate: Moment) {
return MomentDate.diff(moment(0, 'HH')) < 0;
}
function isItAfterToday(MomentDate: Moment) {
return MomentDate.diff(moment(0, 'HH')) > 0;
}
Select yesterday to check past days or not with help of moment().subtract(1, "day");
Reference:- http://momentjs.com/docs/#/manipulating/subtract/
function myFunction() {
var yesterday = moment().subtract(1, "day").format("YYYY-MM-DD");
var SpecialToDate = document.getElementById("theDate").value;
if (moment(SpecialToDate, "YYYY-MM-DD", true).isAfter(yesterday)) {
alert("date is today or in future");
console.log("date is today or in future");
} else {
alert("date is in the past");
console.log("date is in the past");
}
}
<script src="http://momentjs.com/downloads/moment.js"></script>
<input type="date" id="theDate" onchange="myFunction()">
function isTodayOrFuture(date){
date = stripTime(date);
return date.diff(stripTime(moment.now())) >= 0;
}
function stripTime(date){
date = moment(date);
date.hours(0);
date.minutes(0);
date.seconds(0);
date.milliseconds(0);
return date;
}
And then just use it line this :
isTodayOrFuture(YOUR_TEST_DATE_HERE)
If we want difference without the time you can get the date different (only date without time) like below, using moment's format.
As, I was facing issue with the difference while doing ;
moment().diff([YOUR DATE])
So, came up with following;
const dateValidate = moment(moment().format('YYYY-MM-DD')).diff(moment([YOUR SELECTED DATE HERE]).format('YYYY-MM-DD'))
IF dateValidate > 0
//it's past day
else
//it's current or future
Please feel free to comment if there's anything to improve on.
Thanks,
i wanted it for something else but eventually found a trick which you can try
somedate.calendar(compareDate, { sameDay: '[Today]'})=='Today'
var d = moment();
var today = moment();
console.log("Usign today's date, is Date is Today? ",d.calendar(today, {
sameDay: '[Today]'})=='Today');
var someRondomDate = moment("2012/07/13","YYYY/MM/DD");
console.log("Usign Some Random Date, is Today ?",someRondomDate.calendar(today, {
sameDay: '[Today]'})=='Today');
var anotherRandomDate = moment("2012/07/13","YYYY/MM/DD");
console.log("Two Random Date are same date ? ",someRondomDate.calendar(anotherRandomDate, {
sameDay: '[Today]'})=='Today');
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>
check with following:
let isContinue = moment().diff('2020-04-04T20:06:11+05:30')/1000
it is returning in seconds..
If will check as 2 mins condition then
if (isContinue < 120) {
..To check otp details or further logic
} else {
// otp is getting invalid
}
Simplest answer will be:
const firstDate = moment('2020/10/14'); // the date to be checked
const secondDate = moment('2020/10/15'); // the date to be checked
firstDate.startOf('day').diff(secondDate.startOf('day'), 'days'); // result = -1
secondDate.startOf('day').diff(firstDate.startOf('day'), 'days'); // result = 1
It will check with the midnight value and will return an accurate result. It will work also when time diff between two dates is less than 24 hours also.