JavaScript Program to Validate An Email Address

Have you ever considered how important it is to use a verified email address when communicating via electronic mail? Email systems perform address verification just like postal workers do to ensure messages are delivered to the correct people. JavaScript's email address validator is a lifesaver when you need to make sure an email address is correct.

Since it now takes only a few lines of code in JavaScript to verify an email address, the process has become much more accessible. This article serves as a quick reference for building an email address validator in JavaScript. By checking the user-entered email address against a database, this program helps eliminate any mistakes that could occur when sending the email.

We also have an interactive JavaScript course where you can learn JavaScript from basics to advanced and get certified. Check out the course and learn more from here.

Program to Validate An Email Address Using Regex

The test() method returns true if there is a match in the string with the regex pattern. The regular expression (regex) describes a sequence of characters used for defining a search pattern.

// JavaScript Program to validate an email address

function validateEmail(email_id) {

// regex pattern for validation of email address... 
    const regex_pattern =      /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    
    if (regex_pattern.test(email_id)) 
        console.log('The email address is valid');
    
    else 
        console.log('The email address is not valid');
}

validateEmail('abc12345@gmail.com');
validateEmail('hello6996@com');
validateEmail('regex@com');

The email address is valid
The email address is not valid
The email address is not valid

Conclusion

Ultimately, validating an email address is crucial to the security and efficacy of electronic mail. Validity checks for email addresses can be performed quickly and easily with the help of a JavaScript program. How to verify an email address with a set of interactive questions written in JavaScript is the subject of this blog.

This blog explains how to write code that prompts the user for an email address and checks that address against a predefined list of valid addresses using regular expressions. Using this tool, you can check if the user's entered email address is properly formatted and meets other requirements for an email address.