preg: how to write a preg pattern to get domain name from an email?

Question

From an email address like something@gmail.com I want to fetch domain name gmail.com. i want to use that pattern on textbox value in Javascript.

Answer 1

A bit cleaner and up-to-date approach:

const email = "something@gmail.com"
const domain = email.includes('@') && email.split("@").pop()

Domain will be false if email doesn't contain @ symbol.

Answer 2

Why not just do this.

var email = "something@gmail.com", i = email.indexOf("@");
if (i != -1) {
   email = email.substring(i);
}

Regex isn't really required, you could also go email = email.split("@")[1];

Answer 3

Using a simple string split won't work on addresses like 'abc@abc'@example.com which is a valid address (technically). I believe splitting on @ and taking the last element should be fine, because no @ characters are allowed to appear in the domain.

Or, since you requested, a regex: [^@]+$