Function newRequest

packages/engine.io-client/lib/transports/polling-xhr.ts:344–361

(opts)

}

function newRequest(opts) {
  const xdomain = opts.xdomain;

  // XMLHttpRequest can be disabled on IE
  try {
    if ("undefined" !== typeof XMLHttpRequest && (!xdomain || hasCORS)) {
      return new XMLHttpRequest();
    }
  } catch (e) {}

  if (!xdomain) {
    try {
      return new globalThis[["Active"].concat("Object").join("X")](
        "Microsoft.XMLHTTP",
      );
    } catch (e) {}
  }
}