使用angularJS和Reg Exp从电子邮件地址中删除“ +”号

Question

I was tasked with making email address with a "+" sign invalid for registry. I'm new to regex and my research into it led me to believe it's best to state what you want in a valid input and not what you don't want. I used RegexBuddy's simplified RFC 2822 and removed the plus signs from it, to get that expression:

       [a-z0-9!#$%&'*/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?

while passing RB's test feature (ie invalidating "aaa+aa@gmail.com"), it fails to correctly invalidate same input when I use the same expression as the ng-pattern

Answer 1

A quick solution

To remove + symbol

"aaa+aa@gmail.com".replace(/\+/g,''); // -> aaaaa@gmail.com

To validate

var email = "aaa+aa@gmail.com";
var valid = email.match(/\+/g) ? false : true;
if(valid) {
  console.log("Email Id doesn't contain +");
} else {
  console.log("Email Id contains + Invalid");
}

Answer 2

Regex to match if email contains + :

if (/\+/im.test(email)) {
    alert("INVALID " + email );
} else {
    alert("VALID " + email);
}

http://jsfiddle.net/tuga/6gWvJ/3/

Regex to replace the + from email address:

email = email.replace(/\+/, "");

http://jsfiddle.net/tuga/7VFNA/2/