If you are building a website, it is essential to ensure that the data entered
by users is valid and accurate. One of the most critical pieces of information
that users are required to input is their email address. Email validation is
an important process that ensures that the email address entered by the user
is valid and that the data entered is accurate. This article will discuss the
email validation code in HTML, which is a crucial component of web
development.

What is Email Validation?

Email validation is the process of verifying that an email address is valid
and that it belongs to a real person or entity. When a user enters their email
address into a form on your website, you need to ensure that the email address
is valid and that the user has entered it correctly. This is important because
it ensures that any communication you send to the user will reach them, and it
also helps to prevent spam and other unwanted email.

Email Validation Code in HTML

The HTML5 specification introduced a new input type called email, which is
designed to help with email validation. The email input type ensures that the
value entered in the form field is a valid email address. When a user enters
an email address into an email input field, the browser automatically checks
the format of the email address to ensure that it is valid. The email input
type also provides a built-in validation message that appears if the user
enters an invalid email address.

To use the email input type, you need to add the following code to your HTML
form:

<input type="email" name="email" required>

The required attribute is used to specify that the email field is mandatory,
and the email input type ensures that the value entered in the email field is
a valid email address.

Custom Email Validation Code in HTML

If you need to perform custom email validation, you can use JavaScript to
validate the email address entered by the user. The following is an example of
how to validate an email address using JavaScript:

function validateEmail(email) {
var re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
return re.test(email);
}

var email = document.getElementById("email").value;
if (!validateEmail(email)) {
alert("Please enter a valid email address.");
}

The above code uses a regular expression to validate the email address entered
by the user. The regular expression checks that the email address contains an
@ symbol and a dot, and that it does not contain any spaces.

Conclusion

Email validation is an essential part of web development, and it ensures that
the data entered by users is accurate and valid. The email validation code in
HTML5 makes it easier to perform email validation, and it provides a built-in
validation message that appears if the user enters an invalid email address.
If you need to perform custom email validation, you can use JavaScript to
validate the email address entered by the user.