Enforce Password Strength

function isStrongPassword(password) { 
  // Minimum 8 characters, at least one uppercase letter, one lowercase letter, one number, and one special character
  const strongRegex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[!@#$%^&*()_+\-=\[\]{};':"\|,.<>/?]).{8,}$/;
  return strongRegex.test(password);
}

console.log(isStrongPassword("P@ssword123")); // true
console.log(isStrongPassword("password")); // false (no uppercase, no special char, no number)

How it works: The `isStrongPassword` function checks if a password meets specific strength criteria using a lookahead-based regular expression. It ensures the password is at least 8 characters long and contains at least one lowercase letter, one uppercase letter, one digit, and one special character. This is crucial for enhancing application security by enforcing good password practices during user registration or password changes.