regex - Javascript multiple email regexp validation

Question

Normally validation of simple email is:

/^([A-Za-z0-9_-.])+@([A-Za-z0-9_-.])+.([A-Za-z]{2,4})$/

This will validate email like test@test.com

But how to validate if email is multiple?

entry 1: test@test.com, test1@test.com, test2@test.com
entry 2: test@test.com , test1@test.com , test2@test.com
entry 3: test@test.com, test1@test.com , test2@test.com
entry 4: test@test.com

This emails is a possible entries that user will input. Also expect thier is 2 or 3 or 4 or more emails sometimes.

Thanks for the answers.

Answer 1

Split the emails on a comma and validate the entries

var x = getEmails();
var emails = x.split(",");
emails.forEach(function (email) {
  validate(email.trim());
});

Where getEmails() gets the emails from the page, and validate runs your regex against the emails