code: function reqRegionForNetworkingError(resp, done) {
      if (!AWS.util.isBrowser()) {
        return done();
      }
      var error = resp.error;
      var request = resp.request;
      var bucket = request.params.Bucket;
      if (!error || error.code !== 'NetworkingError' || !bucket ||
          request.httpRequest.region === 'us-east-1') {
        return done();
      }
      var service = request.service;
      var bucketRegionCache = service.bucketRegionCache;
      var cachedRegion = bucketRegionCache[bucket] || null;
  
      if (cachedRegion && cachedRegion !== request.httpRequest.region) {
        service.updateReqBucketRegion(request, cachedRegion);
        done();
      } else if (!service.dnsCompatibleBucketName(bucket)) {
        service.updateReqBucketRegion(request, 'us-east-1');
        if (bucketRegionCache[bucket] !== 'us-east-1') {
          bucketRegionCache[bucket] = 'us-east-1';
        }
        done();
      } else if (request.httpRequest.virtualHostedBucket) {
        var getRegionReq = service.listObjects({Bucket: bucket, MaxKeys: 0});
        service.updateReqBucketRegion(getRegionReq, 'us-east-1');
        getRegionReq._requestRegionForBucket = bucket;
  
        getRegionReq.send(function() {
          var region = service.bucketRegionCache[bucket] || null;
          if (region && region !== request.httpRequest.region) {
            service.updateReqBucketRegion(request, region);
          }
          done();
        });
      } else {
        // DNS-compatible path-style
        // (s3ForcePathStyle or bucket name with dot over https)
        // Cannot obtain region information for this case
        done();
      }
     }
docs: For browser only. If NetworkingError received, will attempt to obtain
  the bucket region.
  
  @api private