Are you tired of receiving fake or incorrect email addresses on your website?
Do you want to ensure that your users provide valid email addresses? Then,
email checker JavaScript is the solution that you need. In this article, we
will explore everything you need to know about email checker JavaScript, from
its definition, benefits, implementation, to commonly asked questions.

What is Email Checker JavaScript?


Email checker JavaScript is a code snippet that verifies the validity of an
email address entered in a form field. It checks whether the email address
follows the correct format and whether the domain exists and is active. Email
checker JavaScript can be used in various web development frameworks,
including React, Angular, Vue, and jQuery. It is an essential tool for any
website that requires users to provide their email addresses, such as sign-up
forms, contact forms, and subscription forms.

Benefits of Email Checker JavaScript

The benefits of using email checker JavaScript are numerous. First, it ensures
that the email addresses provided by users are valid, reducing the number of
fake or incorrect email addresses captured. This, in turn, reduces the number
of bounced emails and increases the deliverability of your email campaigns.
Second, it enhances the user experience by providing real-time feedback on the
validity of the email address entered. Users can correct their email addresses
before submitting the form, reducing frustration and errors. Lastly, it
improves the security of your website by preventing spam bots from submitting
fake email addresses.

How to Implement Email Checker JavaScript


Implementing email checker JavaScript is straightforward. You can either use a
pre-built library or write your own code. Here is an example of how to
implement email checker JavaScript using jQuery:

$(document).ready(function() {  
$('form').submit(function(event) {  
var email = $('#email').val();  
if(!isValidEmail(email)) {  
alert('Please enter a valid email address.');  
function isValidEmail(email) {  
var regEx = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;  
return regEx.test(email);  

In this example, we use the jQuery library to select the form element and
attach a submit event listener to it. We then retrieve the value of the email
input field and pass it to the isValidEmail function, which checks whether the
email address follows the correct format using a regular expression. If the
email address is invalid, we prevent the form from submitting and display an
alert message.

Commonly Asked Questions

1. Can email checker JavaScript prevent all fake or incorrect email


No, email checker JavaScript can only verify the format and existence of an
email address. It cannot guarantee that the email address belongs to a real
person or that it is not a disposable email address.

2. What is the best regular expression for email validation?

The best regular expression for email validation is debatable and depends on
your requirements. However, the regular expression used in the example above
is a common and reliable one that covers most email addresses.

3. Can email checker JavaScript be used in server-side validation?

No, email checker JavaScript is a client-side validation tool. Server-side
validation is necessary to ensure that the email address is valid and belongs
to a real person.

4. Is email checker JavaScript compatible with all web browsers?

Email checker JavaScript is compatible with most modern web browsers,
including Google Chrome, Mozilla Firefox, Apple Safari, and Microsoft Edge.
However, some older versions of Internet Explorer may have issues with it.

5. Can email checker JavaScript be used for other form fields?

Yes, email checker JavaScript can be modified to validate other form fields,
such as phone numbers, addresses, and names. However, it requires different
regular expressions and validation logic.