domenic

function processBodyChunkwiseWithProgress(res, processChunk) {
  const dummyEventTarget = document.createElement("div"); // why isn't EventTarget constructible? :(

  const lengthComputable = res.headers.has("Content-Length");
  const total = res.headers.get("Content-Length") || 0;
  let loaded = 0;
  
  // Using http://underscorejs.org/#throttle
  const fireProgressThrottled = _.throttle(fireProgress, 50, { trailing: false });