Email Validation in JavaScript

JavaScript is an open source programming language. It is specifically designed to create web-centric applications. It is lightweight, interpreted and a lot faster as compared to other languages. This means that JavaScript can be utilized to develop web applications with a good design.

The email validation using JavaScript is a significant aspect of the UX of a web application. It helps in inputting the forms correctly and ensures that only the valid information is being passed to the server from the client-side of the application.

What is Validation?

Validation is most often defined as the checking of user input values. It is a vital part of web applications and it improves the UX. We can validate a lot of things like Email, Password, Date, Mobile numbers and so on.

Client-side validation with the use of JavaScript helps to speed the validation of the form data since it is faster in processing the data compared to a server.

Now that we understand a bit about validation, let us go ahead and implement email validation in JavaScript.

How to validate email utilizing JavaScript?

Email validation is one of the important checks to validate an HTML form. Email is a string or subset of ASCII characters divided by @ in two parts. One part holds the personal data and the other part holds the domain name where the email is registered.

1. HTML5 Input Validation

The inclusion of native input validation means that you no longer need to check for data accuracy and provide a smooth user experience, only with JavaScript or server-side validation; HTML5 now has basic built-in form validation. These attributes let you set rules and limitations for user input on form elements.

Syntax:

Code:

Output:

2. Advanced Regex for Comprehensive Validation

Regular expressions are a fantastic way to validate the formatting of inputs. This includes things like special characters, sub domains, and top-level domains, which is why a regex for a valid email should be advanced.

Code:

Output:

FAQs

1) What is validation for an email?

Email validation is a set of procedures used to determine whether an email address is in the correct syntax and complies with the specifications for email addresses.

2) How to validate an email with regex?

Use this regex pattern: /^[\w\.-]+@[a-zA-Z\d\.-]+\.[a-zA-Z]{2,}$/

3) How do I validate email format?

You may validate its shape via regex or use built-in e-mail validation capabilities.

4) How to validate email in JavaScript without regex?

We could either go with HTML5 input element built-in with type="email" or utilize the email input validation in JavaScript.

5) What is the regex code for email validation in JavaScript?

The regex code for email validation in JavaScript is:

/^[\w\.-]+@[a-zA-Z\d\.-]+\.[a-zA-Z]{2,}$/

Conclusion

One of the most important aspects of developing web applications that have a reliable and easy to use interface is Email validation in JavaScript, from simple string in between returns to regex checks, or even utilize HTML5 features.