从电子邮件输入中仅复制域名

Question

I have an input field for email input and URl input field. On double click i copy mail's value to url like this

<script>
   function cp_mail() {
     document.getElementById("mail").value = document.getElementById("Url").value;
   }
 </script>  

Now i only want to copy domain name of email (from the "@" to the end) and insert on the begining of Url "www." .Any Ideas ?

Answer 1

Simply try this

var domainName = emailId.split("@").pop();

or

var domainName = emailId.split("@")[1];

This will split the emailId by @ which will return the array of 2 items, one before @ and one after @ . Second item (or last item) is what you are looking for.

Now compute the URL as

var url = "www." + domainName;

DEMO

 var emailId = "abc@domainname.com"; var domainName = emailId.split("@")[1]; var url = "www." + domainName; alert(url);

Answer 2

you can write like this

var email="test@domain.com";
var domainName = 'www.' + email.split('@')[1]