regex password validation

1r'^
2  (?=.*[A-Z])       // should contain at least one upper case
3  (?=.*[a-z])       // should contain at least one lower case
4  (?=.*?[0-9])      // should contain at least one digit
5  (?=.*?[!@#\$&*~]) // should contain at least one Special character
6  .{8,}             // Must be at least 8 characters in length  
7$
8

1^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$%^&*-]).{8,}$
2

1^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\$%\^&\*])(?=.{8,})

1"^(?=.*[A-Za-z])(?=.*\d)(?=.*[@$!%*#?&])[A-Za-z\d@$!%*#?&]{8,}$"
2

1/^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z0-9])(?!.*\s).{8,15}$/

1function validate(password) {
2    return /^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])[A-Za-z0-9]{6,}$/.test(password);
3}
4
5Explanation:
6
7^               // start of input 
8(?=.*?[A-Z])    // Lookahead to make sure there is at least one upper case letter
9(?=.*?[a-z])    // Lookahead to make sure there is at least one lower case letter
10(?=.*?[0-9])    // Lookahead to make sure there is at least one number
11[A-Za-z0-9]{6,} // Make sure there are at least 6 characters of [A-Za-z0-9]
12$               // end of input
13