JS implements two methods that contain at least letters, upper case numbers, and characters.

This article describes two methods of JS implementing password levels that include at least letters, upper case numbers, and characters. Share it for your reference. The details are as follows:

Preface

If the password is set too simple, it will be easily broken. Therefore, many websites set the password settings requirements quite strictly, generally 3-choose 2 letters, numbers, and characters, which are case-sensitive. For passwords that are set too simply, give an error message. Or display the password level (low, medium and high) to let the user set a high-level password. So how to use JS implementation?

The implementation code is as follows:

 function passwordLevel(password) { var Modes = 0; for (i = 0; i < password.length; i++) { Modes |= CharMode(password.charCodeAt(i)); } return bitTotal(Modes); //CharMode function function CharMode(iN) { if (iN >= 48 && iN <= 57)//Number return 1; if (iN >= 65 && iN <= 90) //Uppercase return 2; if ((iN >= 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; i++) { if (num & 1) modes++; num >>>= 1; } return modes; }}

use

Normal use

Use syntax: passwordLevel(string)

Verification rules: numbers, capital letters, lowercase letters, special characters

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

Running example:

 passwordLevel("123456") //Return 1passwordLevel("Abc'123456") //Return 4

Use in combination with jquery.validate.js:

 //Add verification method: contains at least two rules $.validator.addMethod("strongPsw",function(value,element){ if(passwordLevel(value)==1){returnfalse;} returntrue},"form not conforming");//Start verification $(".form").validate({ rules:{ pwd:{ required:true, //Required minlength:6, //Minimum length maxlength:32, //Maximum length strongPsw:true, //Password strength}, repwd:{ required:true, minlength:6, maxlength:32, equalTo:"#pwd" //Fill in the password again to the same } }});

For friends who are interested in password generation and strength detection, you can also refer to the online tools:

Password security online detection

High-strength password generator

Short link (short URL) online generation tool

I hope this article will be helpful to everyone's JavaScript programming.