JQuery validation plugin regex validate only matches

Question

Yes, yet another question on regex with the JQuery validation plugin. I've followed all the examples I've found but for some reason cannot get this to validate only regex matches. It validates everything regardless of what regex I use (going for dollar amount under 100, optional $ and optional decimal up to hundredths place):

$.validator.addMethod("regexp", function (value, element) {
    return this.optional(element) || /^\$?\d{0,2}(\.\d{1,2}$)?/.test(value);
}, 'Please enter a valid USD format under $100, dollar sign optional.');

$("#formname").validate({
    debug: true,
    rules: {
        textbox: {
            required: true,
            regexp: true
        }
    }
});

JSFIDDLE DEMO

what is your validation criteria that you want to make ? e.g. what are you trying to filter out ? — CME64
– CME64, Commented Jul 5, 2013 at 1:47
Validate only input that matches the regex. Show the error message for everything else. — reflexiv
– reflexiv, Commented Jul 5, 2013 at 1:57
then why do you need a library for that ? you don't , just regex and events (keyup, keydown and change) is all what you need — CME64
– CME64, Commented Jul 5, 2013 at 1:59
I'm open to whatever works but this is part of a larger form that I'm validating. Other parts work using the plugin, I just extracted the part that's not working for some reason. It seems so easy just not sure if I'm missing something obvious. — reflexiv
– reflexiv, Commented Jul 5, 2013 at 2:00
the problem could be in the regex so I need you to explain to me what you want to do with it. so that I can re-build another one for you. — CME64
– CME64, Commented Jul 5, 2013 at 2:06

Anirudha · Accepted Answer · 2013-07-05 03:00:52Z

1

This should do

/^[$]?\d{1,2}([.]\d{1,2})?$/

answered Jul 5, 2013 at 3:00

Anirudha

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2 Comments

reflexiv Over a year ago

Thanks but the regex doesn't appear to be the problem, it's the plugin and/or the jquery. I plug your regex into jsfiddle.net/8fskm/6 and it does not require the input to match the regex. The input always validates, doesn't matter what regex pattern the rule is set to. It's like the plugin isn't even checking, so that indicates a problem with the jquery.

reflexiv Over a year ago

Just double checked it again (forgot to hit run after changes I guess) and I was wrong you are right, thanks!

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