Checking for Date Equality with Javascript

How can I check in JavaScript if two dates selected by the user are the same? The dates will be sent to this function as strings ("xx/xx/xxxx"). This level of detail is sufficient for my needs.

Below is the code I have written:

var valid = true;
var d1 = new Date($('#datein').val());
var d2 = new Date($('#dateout').val());
alert(d1 + "\n" + d2);
if (d1 > d2) {
    alert("Your check out date must be after your check in date.");
    valid = false;
} else if (d1 == d2) {
    alert("You cannot check out on the same day you check in.");
    valid = false;
}

The JavaScript alerts showing the converted dates look like this:

Tue Jan 25 2011 00:00:00 GMT-0800 (Pacific Standard Time)

Tue Jan 25 2011 00:00:00 GMT-0800 (Pacific Standard Time)

The test to determine if date 1 is greater than date 2 is functioning correctly. However, using the == or === operators does not change the 'valid' variable to false as expected.

Answer №1

To determine if two dates are equal, utilize the getTime() method. This function checks the numerical value of the date and can be used for comparison operations such as greater than/less than or equals.

UPDATE:

if (date1.getTime() === date2.getTime())

Answer №2

Instead of using getTime(), you can give this a shot:

(a >= b && a <= b)

Answer №3

let date1 = new Date($('#checkin').val());
let date2 = new Date($('#checkout').val());

Here are two straightforward methods to compare the dates:

  • if(date1.toString() === date2.toString())
  • if(+date1 === +date2)

Answer №4

To determine if the dates are the same, it is more efficient to compare their difference to zero rather than comparing them directly.

if (date1 - date2 === 0)

Answer №5

const dateString = "Wed Oct 07 2015 19:48:08 GMT+0200 (Central European Daylight Time)";

const dateOne = new Date(dateString);
const currentDate = new Date();

const isEqualDates = dateOne.getDate() === currentDate.getDate();

This code snippet compares two dates for equality.

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