如何使用正则表达式允许多个 email id 用逗号分隔？

Question

Issue Description: - The below code works fine for single email id. However, when i pass multiple email id's each separated by commas then it returns false (alert("Please enter valid "+ labelInput +" mail id");).

I need to enable the user to allow multiple email id's comma separated. Example: user1@xyz.com, user2@xyz.com, user3@zzz.com should return true.

Note: - x[i] will contain the comma separated email id's.

Code Snippet: -

var emailRGEX = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;           
            var emailResult = emailRGEX.test(x[i]);
            if (!emailResult) {
                alert("Please enter valid "+ labelInput +" mail id");
                $(this).focus();
                retFlag = false;
                return false;
}

Any help shall be greatly appreciated! Thanks!

Answer 1

If the regex works fine, you should be able to surround the whole thing in a group with a comma at the end, then stick your existing regex at the end. Ie ([existing regex here]\,)*([existing regex here])

In full, it would look like this:

var emailRGEX = /^(\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+\,)*(\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+)$/;

Answer 2

You can split your emails and loop to check if email is valid or not.

 var emails = "123@gmail.com, 345hotmail.com"; emails = $.map(emails.split(","), $.trim); var emailRGEX = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/; for (var i = 0; i < emails.length; i++) { if (.emailRGEX;test(emails[i])) { alert("Please enter valid " + "message" + " mail id"). //$(this);focus(); //retFlag = false; //return false; } }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

Note: Don't forget to trim to handle leading white space.