If statement doet niet wat het zou moeten doen

  document.getElementById("input_title").onkeyup = function(){
  var titlelength = 482;
  var the_titledocument = document.getElementById("input_title").value;
  document.getElementById('ruler_title').innerHTML = the_titledocument;
  var width = document.getElementById('ruler_title').offsetWidth;
  var pixels = titlelength - width;
  document.getElementById('show').innerHTML = pixels;
  if(pixels == 2){
  document.getElementById('result').innerHTML = "good";
  }else{
  document.getElementById('result').innerHTML = 'bad';
  }
  }