From 206c8bf13a230464b24cff7834f8bf16d69b374a Mon Sep 17 00:00:00 2001
From: Rich Trott <rtrott@gmail.com>
Date: Sat, 18 Sep 2021 12:03:19 -0700
Subject: [PATCH] tools,doc: fix misrendering of consecutive JS blocks

Our markdown-to-html tool was assuming that any consecutive JS blocks
were ESM vs CJS alternatives, but that is not always the case, resulting
in both a confusing interface and invalid HTML.
---
 tools/doc/html.mjs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/doc/html.mjs b/tools/doc/html.mjs
index 298a82a7cf0ace..34431ad9d829b2 100644
--- a/tools/doc/html.mjs
+++ b/tools/doc/html.mjs
@@ -227,7 +227,8 @@ export function preprocessElements({ filename }) {
               nextNode.lang !== node.lang) {
             // Saving the highlight code as value to be added in the next node.
             node.value = highlighted;
-          } else if (isJSFlavorSnippet(previousNode)) {
+          } else if (isJSFlavorSnippet(previousNode) &&
+                     previousNode.lang !== node.lang) {
             node.value = '<pre>' +
               '<input class="js-flavor-selector" type="checkbox"' +
               // If CJS comes in second, ESM should display by default.