JSFiddle - React, Tailwind, and code Playground

by booktu8

JavaScript

let nTemp = 0;
 const num = "41272819900727341X";
 const arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
 const arrCh = ["1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"];
 for (let i = 0; i < 17; i++) {
   nTemp += num[i] * arrInt[i];
 }
 const valnum = arrCh[nTemp % 11];
 console.log(nTemp, valnum)
 console.log(valnum, num.substr(17, 1))