Regex and jquery validate. Negate expression

Question

I'm working on a addition method for the jquery validate plugin which must detect if 3 or more consecutive identical characters are entered, and prompt a message. To do so I need to negate a regex expression. This is my method:

$.validator.addMethod("pwcheckconsecchars", function (value) {
    return /(.)\1\1/.test(value) // does not contain 3 consecutive identical chars
}, "The password must not contain 3 consecutive identical characters");

The code above shows the error message when no consecutive identical characters have been entered, so I need to negate the expression /(.)\1\1/ so that it only appears when the error has been made.

This jsfiddle shows my code so far: http://jsfiddle.net/jj50u5nd/3/

Thanks

Regarding your jsFiddle, you should really combine all of those various regular expressions into one. There is no need to have FIVE custom methods! You could even incorporate the min/max length rules into it replacing seven rules at once. — Sparky, Feb 09 '15 at 17:50
@Sparky. The validation rules were set based on business requirements that I can't modify. The thing is that I'd need to show a custom message for each rule not passed. Would that be possible with just a method that gathers all rules? — Adorablepolak, Feb 09 '15 at 18:15
@Pointy. That's not working. Any other suggestion on how to fix this? — Adorablepolak, Feb 09 '15 at 18:16
Enter "AAAa1" and it's working fine for me: http://jsfiddle.net/jj50u5nd/6/ — Sparky, Feb 09 '15 at 18:22

score 1 · Accepted Answer · answered Feb 09 '15 at 18:30

As stated by Pointy in the comments, use a ! character to negate or invert the result.

$.validator.addMethod("pwcheckconsecchars", function (value) {
    return !/(.)\1\1/.test(value); // does not contain 3 consecutive identical chars
}, "The password must not contain 3 consecutive identical characters");

Enter a "AAAa1" into the demo below, it satisfies enough of the other rules to demonstrate this particular method is working.

DEMO: http://jsfiddle.net/jj50u5nd/6/

Regex and jquery validate. Negate expression

1 Answers1