JAVASCRIPT

find email domain javascript

function solution(address) {
    return address.substring(address.lastIndexOf('@') + 1);
}

email id domain check javascript

var myemail = 'test@yahoo.com'

if (/@yahoo.coms*$/.test(myemail)) {
   console.log("it ends in @yahoo");
} 

extract email the user name from email address with javascript

var name = str.match(/^([^@]*)@/)[1];