JSFiddle - React, Tailwind, and code Playground

by Leandro Amorim

HTML

<div id="teste"></div>

JavaScript

Number.prototype.leadingZeros = function (n) {
  var z = n - this.toString().length + 1;
  return Array(z<0?0:z).join("0") + this;
}

for (var i = 1; i < 1000; i++)
teste.innerHTML += 'txtNome' + i.leadingZeros(2) + '<br />'