function(error) {
      // A full list of error codes is available at
      // https://firebase.google.com/docs/storage/web/handle-errors
      console.log(error);

      switch (error.code) {
        case "storage/unauthorized":
          // User doesn't have permission to access the object
          break;

        case "storage/canceled":
          // User canceled the upload
          break;

        case "storage/unknown":
          // Unknown error occurred, inspect error.serverResponse
          break;
      }
    }