JSFiddle - React, Tailwind, and code Playground

HTML

<label id=lbInfo> Enter number </label> <br/>
<input type="input" text="Enter number here" id="tbInput" /><br/>
<input type="submit" value="Submit" id="tbSubmit" /><br/>
<label id=lbResult>Result: </label><br/>

JavaScript

document.getElementById("tbSubmit").addEventListener("click", function(){
    var input = GetInput();
    if (!ValidateInput(input))
    	  ShowError(input)
    else
    {
      var primes = GetPrimeNumbers(input);
      ShowPrimeNumber(primes);
    }
});
function GetInput()
{
	return document.getElementById("tbInput").value;;
}
function ValidateInput(input)
{
  var intInput = parseInt(input);
  return Number.isInteger(intInput) && intInput >= 0 && intInput <= 10000;
}
function ShowMessage(message)
{
  	document.getElementById("lbResult").textContent = message;
}
function ShowError(input)
{
  var response = "Result: " + input + " is not a positive number less than 10001";
	ShowMessage(response);
}
function GetPrimeNumbers(max)
{
  var sieve = [], i, j, primes = [];
  for (i = 2; i <= max; ++i) {
      if (!sieve[i]) {
          // i has not been marked -- it is prime
          primes.push(i);
          for (j = i << 1; j <= max; j += i) {
              sieve[j] = true;
          }
      }
  }
  return primes;
}
function ShowPrimeNumber(primes)
{
    var response = "Result: " + primes;
  	ShowMessage(response);
}