Minimum eight characters, at least one letter and one number:"^(?=.*[A-Za-z])(?=.*d)[A-Za-zd]{8,}$"Minimum eight characters, at least one letter, one number and one special character:"^(?=.*[A-Za-z])(?=.*d)(?=.*[@$!%*#?&])[A-Za-zd@$!%*#?&]{8,}$"Minimum eight characters, at least one uppercase letter, one lowercase letter and one number:"^(?=.*[a-z])(?=.*[A-Z])(?=.*d)[a-zA-Zd]{8,}$"Minimum eight characters, at least one uppercase letter, one lowercase letter, one number and one special character:"^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[@$!%*?&])[A-Za-zd@$!%*?&]{8,}$"Minimum eight and maximum 10 characters, at least one uppercase letter, one lowercase letter, one number and one special character:"^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[@$!%*?&])[A-Za-zd@$!%*?&]{8,10}$"
r'^(?=.*[A-Z])// should contain at least one upper case(?=.*[a-z])// should contain at least one lower case(?=.*?[0-9])// should contain at least one digit(?=.*?[!@#$&*~])// should contain at least one Special character.{8,}// Must be at least 8 characters in length
$
functionvalidate(password){return/^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])[A-Za-z0-9]{6,}$/.test(password);}Explanation:^// start of input (?=.*?[A-Z])// Lookahead to make sure there is at least one upper case letter(?=.*?[a-z])// Lookahead to make sure there is at least one lower case letter(?=.*?[0-9])// Lookahead to make sure there is at least one number[A-Za-z0-9]{6,}// Make sure there are at least 6 characters of [A-Za-z0-9]
$ // end of input
// minimum 8 characters , minimum one specil charecter , minimum one uppercase and one lowercase letter required/^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[@$!%*?&])[A-Za-zd@$!%*?&]{8,}$/
^Startanchor(?=.*[A-Z].*[A-Z])Ensure string has two uppercase letters.(?=.*[!@#$&*])Ensure string has one special case letter.(?=.*[0-9].*[0-9])Ensure string has two digits.(?=.*[a-z].*[a-z].*[a-z])Ensure string has three lowercase letters..{8}Ensure string is of length 8.
$ End anchor.
^ # start-of-string(?=.*[0-9]) # a digit must occur at least once(?=.*[a-z]) # a lower case letter must occur at least once(?=.*[A-Z]) # an upper case letter must occur at least once(?=.*[@#$%^&+=]) # a special character must occur at least once(?=S+$) # no whitespace allowed in the entire string
.{8,} # anything, at least eight places though
$ # end-of-string
// Match at least one uppercase letter, // at least one lowercase letter, // at least one digit // and includes 12 or more symbolsString validPassRegex ="^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=S+$).{12,}$";// and special characters:String validPassRegex2 ="^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])(?=S+$).{8,}$";