Password level: At least two JS implementations with letters, uppercase and lowercase numbers, and characters

Objective

Password, if set too simple, it is easy to be compromised, so many sites will set the password requirements are very strict, usually letters, numbers, characters 3 selected 2, case-sensitive. For passwords that are too simple to set, give them a wrong hint. or the password level (Low medium high) display, let the user set the advanced password. So how to use JS to achieve it?

Code

Links: https://gist.github.com/xuanfeng/a44f20cb4569d5b4cd5e

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function passwordlevel(password) {     var modes = 0     for (i = Span class= "CRAYON-CN" >0; i < password. Length; i++) { Modes |= charmode(password. charCodeAt(i));     } return bittotal(Modes); //charmode function function charmode(in) { if (in >=) && in <= 57< c17>)//Digital return 1; if (in >= && in <= 90< c17>) //capital Letter return 2; If ((Inch >= 97 && iN <= 122 | | (in >= 65 && in <= 90) //case return 4; Else return 8; //special characters     } //bittotal function function bittotal(num) { modes = 0;         for (i = 0; i < 4< Span class= "Crayon-sy" >; i++) { /span> if (num & 1) modes+ +; num >>>= 1;         } return modes;     }}

Use normal use

Use Syntax: Passwordlevel (String)

Validation rules: Numeric, uppercase, lowercase, special characters

Function Result: Returns the number of rules contained in the password

Running Examples:

12	passwordlevel("123456") //return 1 passwordlevel("ABC ' 123456") //Return 4

Combined with Jquery.validate.js

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//Add validation method: Contains at least two rules$. Validator. Addmethod ( "STRONGPSW" function (value< Span class= "Crayon-sy" >, element) { if(passwordlevel(value) = = 1){return false ; } return true }, "format not Compliant"); //start validation$(". Form"). Validate({ rules: { pwd: { required: true, //Required minlength: 6, //min. length maxlength: max. //Maximum length strongpsw: true, //Password strength         }, repwd: { required: true, minlength: 6, maxlength: equalto: "#pwd" //re-fill the password to be consistent         }    }});

Password level: At least two JS implementations with letters, uppercase and lowercase numbers, and characters