I'm using the Jquery Validate plugin to validate facebook usernames, and by default it can have letters, numbers, and periods.
Ex: joao, joao22, joao.maluco22
How to validate this with jQuery Validate?
The default methods are as follows:
jQuery.validator.addMethod("lettersonly", function(value, element) {
return this.optional(element) || /^[a-z]+$/i.test(value);
}, "Somente letras");
Adds a method to the validator
$.validator.addMethod("validarUsuario", function(value, element) {
return this.optional( element ) || /^[a-zA-Z0-9.]+$/.test( value );
}, 'Informe um usuário válido.');
Adds a rule bound to a class, so inputs with class validar-usuario will be validated by this new rule validarUsuario . You can add more than one rule too, for example, make the field mandatory, also adding the required rule.
$.validator.addClassRules("validar-usuario", {
"validarUsuario": true
});
Your input looks like this:
<input type="text" class="validar-usuario" id="ipt_usuario">