diff --git a/clang/lib/Format/FormatTokenLexer.cpp b/clang/lib/Format/FormatTokenLexer.cpp
--- a/clang/lib/Format/FormatTokenLexer.cpp
+++ b/clang/lib/Format/FormatTokenLexer.cpp
@@ -120,8 +120,11 @@
       Tokens.back()->Tok.setKind(tok::starequal);
       return;
     }
-    if (tryMergeTokens(JSNullishOperator, TT_JsNullishCoalescingOperator))
+    if (tryMergeTokens(JSNullishOperator, TT_JsNullishCoalescingOperator)) {
+      // Treat like the "||" operator (as opposed to the ternary ?).
+      Tokens.back()->Tok.setKind(tok::pipepipe);
       return;
+    }
     if (tryMergeTokens(JSNullPropagatingOperator,
                        TT_JsNullPropagatingOperator)) {
       // Treat like a regular "." access.
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -2294,6 +2294,11 @@
 
 TEST_F(FormatTestJS, NullishCoalescingOperator) {
   verifyFormat("const val = something ?? 'some other default';\n");
+  verifyFormat(
+      "const val = something ?? otherDefault ??\n"
+      "    evenMore ?? evenMore;\n",
+      "const val = something ?? otherDefault ?? evenMore ?? evenMore;\n",
+      getGoogleJSStyleWithColumns(40));
 }
 
 TEST_F(FormatTestJS, Conditional) {