Validate email address textbox using JavaScript

Question

I have a requirement to validate an email address entered when a user comes out from the textbox.
I have googled for this but I got form validation JScript; I don\'t wa

Answer 1

You should use below regex which have tested all possible email combination

     function validate(email) {
            var reg = "^[a-zA-Z0-9]+(\.[_a-zA-Z0-9]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*(\.[a-zA-Z]{2,15})$";
            //var address = document.getElementById[email].value;
            if (reg.test(email) == false) 
            {
                alert('Invalid Email Address');
                return (false);
            }  
     }

Bonus tip if you're using this in Input tag than you can directly add the regex in that tag example

Above you can see two attribute required & pattern in

required make sure it input block have data @time of submit &
pattern make sure it input tag validate based in pattern(regex) @time of submit

For more info you can go throw doc