How to make validation with the following conditions?

Question

Username : at least 5 letters and all lowercase letters Password : is a combination of 2-digit numbers followed by the symbol "@" or the symbol "&" and followed by 4 uppercase letters

Example : Username : meatball / jungernaut Password : 21@YOUR / 74&GOOD

IAM TRY

var slt = "gordonbam"
var sltk = "12@BANA"
var username =  /[1-5][A-Z]/g;
var password = /[1-2](@|&)\w[1-4][A-Z]/g;

var result1 = slt.match(username);
var result2 = sltk.match(password);

console.log(result1);
console.log(result2);

Provide any solutions you have tried. More likely to get help from the community when doing so. — rc_dz, Nov 15 '19 at 03:20
why I find it very difficult to understand regular expressions ? — kui beatbox, Nov 15 '19 at 03:26
PLEASE see [Reference - Password Validation](https://stackoverflow.com/q/48345922/3600709). DO NOT VALIDATE PASSWORDS ON CLIENT SIDE — ctwheels, Nov 15 '19 at 03:28

Emma · Accepted Answer · 2019-11-15T03:28:02.607

Maybe,

^[0-9]{2}[@&][A-Z]{4}$

and

^[a-z]{5,}$

might work OK for pass and username.

If you wish to simplify/modify/explore the expression, it's been explained on the top right panel of regex101.com. If you'd like, you can also watch in this link, how it would match against some sample inputs.

RegEx Circuit

jex.im visualizes regular expressions:

const regex = /^\d{2}[@&][A-Z]{4}$/gm;
const str = `21@YOUR
74&GOOD
74&aaaa
74&AAAz`;
let m;

while ((m = regex.exec(str)) !== null) {
    // This is necessary to avoid infinite loops with zero-width matches
    if (m.index === regex.lastIndex) {
        regex.lastIndex++;
    }
    
    // The result can be accessed through the `m`-variable.
    m.forEach((match, groupIndex) => {
        console.log(`Found match, group ${groupIndex}: ${match}`);
    });
}

function password(pw) { fpassword = /[0-9]{3}[*][a-z]{3}$/; console.log(fpassword.test(pw)); } password("111*sss"); password("123*try"); — kui beatbox, Nov 16 '19 at 04:40

score 0 · Answer 2 · answered Nov 15 '19 at 05:33

0

for Username:

^([a-z]*[a-z]){5}[a-z]*$

for Password:

^[0-9]{2}[@][A-Z]{4}$

try this and if there is any problem then comment me

answered Nov 15 '19 at 05:33

Milan Tejani

372
5
21

How to make validation with the following conditions?

2 Answers2

RegEx Circuit