ge load and add to head. (default) = 0ms load after timeout,
    // useXhr: 1, // Use XHR instead of fetch to report failures (if available),
    crossOrigin: "anonymous", // When supplied this will add the provided value as the cross origin attribute on the script tag
    // onInit: null, // Once the application insights instance has loaded and initialized this callback function will be called with 1 argument -- the sdk instance (DO NOT ADD anything to the sdk.queue -- As they won't get called)
    cfg: { 