diff --git a/javascript/net/grpc/web/grpc_generator.cc b/javascript/net/grpc/web/grpc_generator.cc
index 9811f3a..29e253a 100644
--- a/javascript/net/grpc/web/grpc_generator.cc
+++ b/javascript/net/grpc/web/grpc_generator.cc
@@ -1027,8 +1027,11 @@ void PrintMethodDescriptorFile(Printer* printer,
   printer->Print(
       vars,
       "/**\n"
-      " * @fileoverview gRPC-Web generated MethodDescriptors for $package$\n"
-      " * @enhanceable\n"
+      " * @fileoverview gRPC-Web generated MethodDescriptors for $package$\n");
+  if (vars["plugins"].empty()) {
+    printer->Print(" * @enhanceable\n");
+  }
+  printer->Print(
       " * @public\n"
       " */\n\n"
       "// GENERATED CODE -- DO NOT EDIT!\n\n\n"
@@ -1038,6 +1041,11 @@ void PrintMethodDescriptorFile(Printer* printer,
   printer->Print(vars,
                  "goog.provide('proto.$package_dot$$class_name$.$"
                  "method_name$MethodDescriptor');\n\n");
+  if (!vars["plugins"].empty()) {
+    printer->Print(vars,
+                   "goog.require('$plugins$.$package_dot$$class_name$.$"
+                   "method_name$MethodDescriptor');\n");
+  }
   printer->Print(vars, "goog.require('grpc.web.MethodDescriptor');\n");
   printer->Print(vars, "goog.require('grpc.web.MethodType');\n");
   printer->Print(vars, "goog.require('$in_type$');\n");
@@ -1507,6 +1515,7 @@ class GeneratorOptions {
   string OutputFile(const string& proto_file) const;
 
   string mode() const { return mode_; }
+  string plugins() const { return plugins_; }
   ImportStyle import_style() const { return import_style_; }
   bool generate_dts() const { return generate_dts_; }
   bool generate_closure_es6() const { return generate_closure_es6_; }
@@ -1516,6 +1525,7 @@ class GeneratorOptions {
  private:
   string file_name_;
   string mode_;
+  string plugins_;
   ImportStyle import_style_;
   bool generate_dts_;
   bool generate_closure_es6_;
@@ -1526,6 +1536,7 @@ class GeneratorOptions {
 GeneratorOptions::GeneratorOptions()
     : file_name_(""),
       mode_(""),
+      plugins_(""),
       import_style_(ImportStyle::CLOSURE),
       generate_dts_(false),
       generate_closure_es6_(false),
@@ -1566,6 +1577,8 @@ bool GeneratorOptions::ParseFromOptions(
       }
     } else if ("multiple_files" == option.first) {
       multiple_files_ = "True" == option.second;
+    } else if ("plugins" == option.first) {
+      plugins_ = option.second;
     } else if ("goog_promise" == option.first) {
       goog_promise_ = "True" == option.second;
     } else {
@@ -1620,6 +1633,7 @@ class GrpcCodeGenerator : public CodeGenerator {
     vars["package"] = package;
     vars["package_dot"] = package.empty() ? "" : package + '.';
     vars["promise"] = "Promise";
+    vars["plugins"] = generator_options.plugins();
 
     if ("binary" == generator_options.mode()) {
       vars["mode"] = GetModeVar(Mode::OP);
diff --git a/javascript/net/grpc/web/streambodyclientreadablestream.js b/javascript/net/grpc/web/streambodyclientreadablestream.js
index a2ecf38..f8b5c93 100644
--- a/javascript/net/grpc/web/streambodyclientreadablestream.js
+++ b/javascript/net/grpc/web/streambodyclientreadablestream.js
@@ -139,8 +139,8 @@ class StreamBodyClientReadableStream {
         const responseMessage = this.grpcResponseDeserializeFn_(response);
         const grpcStatus = StatusCode.fromHttpStatus(this.xhr_.getStatus());
         if (grpcStatus == StatusCode.OK) {
-          this.sendDataCallbacks_(responseMessage);
           this.sendMetadataCallbacks_(this.readHeaders_());
+          this.sendDataCallbacks_(responseMessage);
         } else {
           this.sendErrorCallbacks_(
               /** @type {!GrpcWebError} */ ({