Including a hyphen in a regex character bracket?

Question

$.validator.addMethod(\'AZ09_\', function (value) { 
    return /^[a-zA-Z0-9.-_]+$/.test(value); 
}, \'Only letters, numbers, and _-. are allowed\');

Answer 1

Escaping using \- should be fine, but you can also try putting it at the beginning or the end of the character class. This should work for you:

/^[a-zA-Z0-9._-]+$/