The comparison of dates is returning false despite the fact that the dates are actually the same

I am facing an issue with my datepicker where it is not taking the date "12/31/9999" even though the maxDate is set to today.

https://i.sstatic.net/gjBoV.png

Despite inputting the date in the correct format, the comparison in the code returns false. Here is how I have implemented it:

private CheckDate(form: FormGroup, group: any) {
     if (form.controls["date"].value == new Date("12/31/9999")) {
         //form.controls["date"].valid = true;
         (group.questions["date"] as DateTimePickerQuestion).maxDate = null;
     }
}

On comparing form.controls["date"].value to new Date("12/31/9999"), it consistently returns false and fails to execute the intended code block.

I am puzzled by this behavior. Below are the values from the immediate window for reference:

new Date("12/31/9999")
Fri Dec 31 9999 00:00:00 GMT-0500 (Eastern Standard Time) {}
form.controls["date"].value
Fri Dec 31 9999 00:00:00 GMT-0500 (Eastern Standard Time) {}
form.controls["date"].value == new Date("12/31/9999")
false

Answer №1

I concur with the advice given by Heretic Monkey. It appears that you are attempting to make a comparison between two distinct entities. I suggest converting both values into either strings or dates first before proceeding. When it comes to standardizing date formats for comparison, I usually utilize the datePipe method (since sometimes the formats can vary greatly, such as in the examples below:

01/10/2020 - First of October

01/10/2020 - 10th of January

Therefore, ensure that you are comparing objects of the same type and using the same date format! :)

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