JavaScript Email Validation

Email validation is a process of verifying the authenticity of an email address. JavaScript provides us with the necessary tools and syntax to perform this validation. In this article, we will explore how JavaScript can be used for email validation.

Syntax

The syntax used for email validation in JavaScript is as follows:

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

Here, validateEmail is the function that takes an email address as an argument and returns a boolean value indicating whether the email is valid or not. The regular expression used in the pattern variable checks whether the email address contains a valid format of characters and symbols.

Example

// Sample email addresses
const validEmail = "user@example.com";
const invalidEmail = "user@.com";

// Validate valid email
console.log(validateEmail(validEmail)); // Output: true

// Validate invalid email
console.log(validateEmail(invalidEmail)); // Output: false

Output

The output of the email validation function is either true or false depending on whether the email address passed as an argument is valid or not.

Explanation

The regular expression used in the email validation function checks the email address for the following things:

• The email address should not contain any whitespace characters.
• The email address should have an @ symbol.
• The email address should have a period . after the @ symbol.
• The email address should end with a valid domain name (e.g. .com, .edu, etc.)

If all of these conditions are met, the function returns true, indicating that the email address is valid.

Use

Email validation is an essential part of web development and is used in various forms and login pages to make sure that the user has entered a valid email address. Developers can use the JavaScript email validation function provided above to validate email addresses on their websites.

Important Points

• The regular expression used in the email validation function is case sensitive.
• The email validation function only checks whether an email address is formatted correctly. It does not verify whether the email address exists or not.

Summary

In this article, we discussed how JavaScript can be used for email validation. We examined the syntax, example, output, and explanation of the email validation function in JavaScript. We also discussed its use, important points, and summarized the key takeaways of the article.