add random number of digits to Streamlabs' host alert message in the viewer count

modifyStreamlabsHostingAlertViewerCount.js

var randomNumber = function(length, isLengthRandom = false) {
  var number = 0;
  actualLength = isLengthRandom?
    parseInt(Math.random()*length)+1:
    length;
  number = parseInt(Math.random()*Math.pow(10, actualLength));
  return number;
}
var formatEachLetter = function(str, format, indicator) {
  var formatted = "";
  for(var i=0; i<str.length; i++) {
    formatted += format.replace(indicator, str[i]);
  }
  return formatted;
}

var modifyNumber = setInterval(function() {
  var numberDom = document.
    querySelector("#alert-message > span:nth-child(2) > span");
  numberDom.innerHTML = 
    numberDom.innerHTML.trim() +
    formatEachLetter(
      ""+randomNumber(3, true), 
      '<span class="animated-letter None">#</span>', 
      "#"
    );
  clearInterval(modifyNumber);
}, 20);