<!DOCTYPE html> <html> <head> </head> <body> <input type="email" id="email" /> <button onclick="validateEmail()">Validate Email</button> <script> function validateEmail(){ var email = document.getElementById('email').value; let regex = /^(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i; if (regex.test(email)) { alert('Valid Email Address'); } else { alert('Invalid Email Address'); } } </script> </body> </html>