Validate corporate emails in validate.js script

Question

How is it possible to validate corporate emails in Validate.js plugin? To prevent users from entering a non-corporate emails. Of emails like @gmail.com, @yahoo.com, @hotmail.com.

That's the part of email validation in Validate.js main script:

email: function( value, element ) {
            return this.optional( element ) || /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/.test( value );
        }

Answer 1

A clean way to solve this is to extract the domain name into a variable (by taking a substring after the @) and then to check the value against an array of domains.

Doing this in a regex is creating a nightmare for whoever is going to read this code in the future!

Example:

var email = "name@example.com";
var domainName = email.slice((email.indexOf("@") + 1), email.length);

and then check if domainName is in the list of domains.

Answer 2

Add the exceptions and validate against them..

In your case, you can use multile regex and validate against them like this..

  var regex1 =   what-ever-regex-is-@yahoo.com
  var regex2 =   what-ever-regex-is-@hotmail.com
  var regex3 =   what-ever-regex-is-@gmail.com
  var regex4 =   what-ever-regex-is-@live.com

and use ! in-front of return..that means if one of them would be existing, your check would return true but ! will change the sign so that will be false and use it in your code accordingly.

 email: function( value, element ) {
        return (this.optional( element ) || 
 /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@yahoo.com$/.test( value ) 
    || /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@hotmail.com$/.test( value )  );
    }

Another way could be to merge all of these knows domains in one regex and check against it.