Validate an Email ID using Regex ?

There are many articles already posted on this by Nishat, Ankur etc. I am trying to recollect the things and put it in a manner so that one can directly use it without any hassle.

1. Using inbuilt Regex option in Service catalog :-

When we add variables to service catalog, we can use default Regex validation option available for Email ID, IP address, Zip code, Number and URL.

2. Customized Email ID validation :

If Email ID requirement is like below:

/*

1. max length = 30

2. before @ 4 to 16

3. after @ and before . 3 to 10

4. ending with .com or .co.in

5. first letter small case alphabet

*/

2.1 ]

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

if (isLoading || newValue === '') {

return;

}

var regex = /[a-z][a-zA-Z0-9.-]{3,15}@[a-zA-Z0-9]{3,10}.(com|co.in)/;

newValue = newValue.toString();

var isValidFormat = regex.test(newValue);

if(!isValidFormat){

g_form.addErrorMessage('Please enter valid email address.');

g_form.addErrorMessage('1. max length = 30');

g_form.addErrorMessage('2. before @ 4 to 16');

g_form.addErrorMessage('3. after @ and before . 3 to 10');

g_form.addErrorMessage('4. ending with .com or .co.in');

g_form.addErrorMessage('5. first letter small case alphabet');

g_form.clearValue('u_email_new');

}

}

2.2]

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

if (isLoading || newValue === '') {

return;

}

var email = g_form.getValue('u_email_new');

if(!email.match(/[a-z][a-zA-Z0-9.-]{3,15}@[a-zA-Z0-9] {3,10}.(com|co.in)/)){

g_form.addErrorMessage('Please enter a valid email ID);

g_form.setValue('u_email_new','');

}

}

2.3]

function onSubmit() {

g_form.hideErrorBox('u_email_new');

var email = g_form.getValue('u_email_new');

return validateEmail(email);

}

function validateEmail(email) {

if (!email || email.trim().length <= 0)

return true;

var regex = /[a-z][a-zA-Z0-9.-]{3,15}@[a-zA-Z0-9] {3,10}.(com|co.in)/;

if (!regex.test(email)) {

g_form.showErrorBox('u_email_new', getMessage('Invalid Email ID'));

return false;

}

return true;

}

If this article is useful for you to understand Email validation , please take some time and efforts to mark article as Helpful. Thank you for your time !!!

Warm Regards,

Rishikesh