From fa43947154a5e8e1c262292b28881f76c1c1f458 Mon Sep 17 00:00:00 2001
From: "Kenneth G. Franqueiro" <kfranqueiro@users.noreply.github.com>
Date: Thu, 5 Mar 2026 13:36:41 -0500
Subject: [PATCH] Middleware: Don't apply HTML transformations to non-HTML
 responses

---
 site/src/middleware.ts              | 2 ++
 site/src/pages/museum/api/search.ts | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/site/src/middleware.ts b/site/src/middleware.ts
index 9b570ff2..ce4a0924 100644
--- a/site/src/middleware.ts
+++ b/site/src/middleware.ts
@@ -9,6 +9,8 @@ import GithubSlugger from "github-slugger";
  */
 const addHeadingIds: MiddlewareHandler = async (_, next) => {
   const response = await next();
+  if (response.headers.get("Content-Type") !== "text/html") return response;
+
   const $ = load(await response.text());
   const slugger = new GithubSlugger();
 
diff --git a/site/src/pages/museum/api/search.ts b/site/src/pages/museum/api/search.ts
index 4813013d..e49eac68 100644
--- a/site/src/pages/museum/api/search.ts
+++ b/site/src/pages/museum/api/search.ts
@@ -30,5 +30,7 @@ export const GET: APIRoute = async () => {
       });
   }
 
-  return new Response(JSON.stringify(pageResults));
+  return new Response(JSON.stringify(pageResults), {
+    headers: { "Content-Type": "application/json" },
+  });
 };