How do I read binary data to a byte array in Javascript?

Question

I want to read a binary file in JavaScript that would be gotten through XMLHttpRequest and be able to manipulate that data. From my researching I discovered this method of r

Answer 1

function load_binary_resource(url) {
  var byteArray = [];
  var req = new XMLHttpRequest();
  req.open('GET', url, false);
  req.overrideMimeType('text\/plain; charset=x-user-defined');
  req.send(null);
  if (req.status != 200) return byteArray;
  for (var i = 0; i < req.responseText.length; ++i) {
    byteArray.push(req.responseText.charCodeAt(i) & 0xff)
  }
  return byteArray;
}

See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Sending_and_Receiving_Binary_Data for more details