From c94f72de0fc0598df9d3e6a7c10dcbbc37004fe0 Mon Sep 17 00:00:00 2001
From: Sebastian Markbage <sebastian@calyptus.eu>
Date: Wed, 19 Oct 2022 18:28:51 -0400
Subject: [PATCH] Add extra fetch properties if there were any

---
 packages/react/src/ReactFetch.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/react/src/ReactFetch.js b/packages/react/src/ReactFetch.js
index a67c2c09a11e1..7c39cefdf3f92 100644
--- a/packages/react/src/ReactFetch.js
+++ b/packages/react/src/ReactFetch.js
@@ -118,6 +118,9 @@ if (enableCache && enableFetchInstrumentation) {
         // of the body so that it can be read multiple times.
         return match.then(response => response.clone());
       };
+      // We don't expect to see any extra properties on fetch but if there are any,
+      // copy them over. Useful for extended fetch environments or mocks.
+      Object.assign(fetch, originalFetch);
     } catch (error) {
       // Log even in production just to make sure this is seen if only prod is frozen.
       // eslint-disable-next-line react-internal/no-production-logging