CSS units parser

//Open the file directly in the browser and run this script from the console
//Assumptions: The browser uses a <pre/> tag for showing the CSS code
var file = document.querySelector("pre");
var fileContent = file.innerHTML;

var newContent = fileContent.replace(/([\d.]+)(px)/g, function(m){
  var measure = parseFloat(m.split("px")[0]);
  var newMeasure = measure / 10;
  newMeasure = newMeasure.toFixed(2);
  newMeasure = newMeasure.replace(/(\.[0-9]*?)0+$/, "$1"); // remove trailing zeros
  newMeasure = newMeasure.replace(/\.$/, ""); // remove trailing dot

  return newMeasure+"rem";
});

file.parentNode.innerHTML = "<pre>"+newContent+"</pre>";