JavaScript Program to Validate An Email Address

To understand this example, you should have the knowledge of the following JavaScript programming topics:

Example: Using Regex

// program to validate an email address

function validateEmail(email_id) {
    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');



The email address is valid
The email address is not valid

In the above program, the regular expression pattern


checks if an email address is valid or not.

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.

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