How to validate an email address in JavaScript?

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Khushi Singh · Answer

Email validation using JavaScript ensures that the user input is in the right format before submission. Commonly used are
regular expressions (RegExp), employed to check if the email follows the standard pattern
(username@domain.com).
A normal regular expression would usually check that:It contains an arbitrary mix of letters, numbers, dots, and underscores directly before the @ symbol.The domain name must have genuine TLDs such as .com/.net/.org and it should have at least one suitable dot.
Another means would be to use the input field type="email", which provides an elementary validation in HTML, but generally, JavaScript validation seems to be better to allow greater customization and control.and 
Another means is using third-party libraries such as validator.js for intense email validations. These libraries would also take care of edge cases like internationalized domain names or not so common formats of emails.
JavaScript can confirm an email format but cannot tell if that email actually exists. Such actions would usually require server-side validation, for example, sending a confirmation email or an API-based email validation service.
Following a well-structured approach enhances user experience and prevents the submission of invalid email addresses in web applications.

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How to validate an email address in JavaScript?

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