xhr.upload.onProgress used instead xhr.upload.onLoad

Author: Mehmetyaz

pkgs/http/lib/src/base_request.dart

@@ -101,7 +101,7 @@ abstract class BaseRequest {
   ///
   /// If defined, this callback will be called when the upload progress changes.
   ///
-  /// In browser, uses XMLHttpRequest's "xhr.upload.onLoad" event.
+  /// In browser, uses XMLHttpRequest's "xhr.upload.onProgress" event.
   ///
   /// In IO, uses the yield length of the stream. The total length of the bytes
   /// yielded by the stream at any given moment is "uploaded" and the total

pkgs/http/lib/src/browser_client.dart

@@ -52,7 +52,7 @@ class BrowserClient extends BaseClient {
     var completer = Completer<StreamedResponse>();
 
     if (request.onUploadProgress != null) {
-      xhr.upload.onLoad.listen((event) {
+      xhr.upload.onProgress.listen((event) {
         if (event.lengthComputable) {
           request.onUploadProgress!(event.total!, event.loaded!);
         }