diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index b241fe94909f..57f30276b364 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -442,6 +442,9 @@ private:
               Style.Language == FormatStyle::LK_JavaScript)
             Left->Type = TT_DictLiteral;
         }
+        if (CurrentToken->is(tok::comma) &&
+            Style.Language == FormatStyle::LK_JavaScript)
+          Left->Type = TT_DictLiteral;
         if (!consumeToken())
           return false;
       }
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 90a12941bb12..6f494db71d15 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -259,6 +259,13 @@ TEST_F(FormatTestJS, ContainerLiterals) {
                "  b: b,\n"
                "  'c': c,\n"
                "};");
+
+  // Dict literals can skip the label names.
+  verifyFormat("var x = {\n"
+               "  aaa,\n"
+               "  aaa,\n"
+               "  aaa,\n"
+               "};");
 }
 
 TEST_F(FormatTestJS, MethodsInObjectLiterals) {