jQuery date validation

[JBellTek]

I am writing a date validation function using jQuery, and seem to have run into a snag. Before I go into detail on the actual date, I run a quick regex to make sure that the format is right, but it is returning false on some dates that I know are valid. For instance, 01/22/2010 is fine, but it fails 11/22/2010. I know it has to be my regex string, but I don't know what I am doing wrong. Thoughts?

     jQuery.validator.addMethod("date", function(value, element) {
         var pass = this.optional(element) || /^(\d{2})(\/\d{2})(\/\d{4})$/.test(value);
         if (pass == false) {
           errorMsg = ('Must be in Date format mm/dd/yyyy');
           return 0;
         } else {
           etc.

 

[BillyRayPreachersSon]

I don't think your regerx is at fault, as both of these show "true" for me:

alert(/^(\d{2})(\/\d{2})(\/\d{4})$/.test('01/22/2010'));
alert(/^(\d{2})(\/\d{2})(\/\d{4})$/.test('11/22/2010'));

Therefore, I'd suggest debugging your function further (put a breakpoint in at the start to ensure "value" is what you think it really is).

Dan



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[feherke]

Hi

Just because we are talking about debugging. Pointless parenthesis ( () ) makes the debugging of regular expressions harder. Beside that, unnecessary capturing of groups slows down the matching.

[gray]// no[/gray]
[fuchsia]/^(\d{2})(\/\d{2})(\/\d{4})$/[/fuchsia][teal].[/teal][COLOR=darkgoldenrod]test[/color][teal]([/teal]value[teal])[/teal]

[gray]// yes[/gray]
[fuchsia]/^\d{2}\/\d{2}\/\d{4}$/[/fuchsia][teal].[/teal][COLOR=darkgoldenrod]test[/color][teal]([/teal]value[teal])[/teal]

Feherke.

http://free.rootshell.be/~feherke/

 

[JBellTek]

BillyRayPreachersSon:

You are correct. I have fixed this problem, and it was not the regex at fault. Using breakpoints did help me find the error farther down in the code.

feherke:
Thank you for your input. I have been attempting to better my skills with regex, and your comment helps me to refine my abilities.