Function doCallback

src/Fetch.js:750–756

(f)

  var fetchAttrSynchronous = !!(fetchAttributes & {{{ cDefs.EMSCRIPTEN_FETCH_SYNCHRONOUS }}});

  function doCallback(f) {
    if (fetchAttrSynchronous) {
      f();
    } else {
      callUserCallback(f);
    }
  }

  var reportSuccess = (fetch, xhr, e) => {
#if FETCH_DEBUG