From a9ba59dccc4712571530fd785bb9aa6cc277bea8 Mon Sep 17 00:00:00 2001
From: Lars Trieloff <lars@trieloff.net>
Date: Mon, 4 Mar 2024 12:20:41 +0100
Subject: [PATCH] feat(resources): add missingresource checkpoint behind
 feature toggle

---
 src/index.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/index.js b/src/index.js
index 864a1aa..845da27 100644
--- a/src/index.js
+++ b/src/index.js
@@ -171,6 +171,15 @@ function addLoadResourceTracking() {
       .forEach((entry) => {
         sampleRUM('loadresource', { source: entry.name, target: Math.round(entry.duration) });
       });
+
+    if (window.origin === 'business.adobe.com') {
+      // feature flagged for now
+      list.getEntries()
+        .filter((entry) => entry.responseStatus === 404)
+        .forEach((entry) => {
+          sampleRUM('missingresource', { source: entry.name, target: entry.hostname });
+        });
+    }
   });
   observer.observe({ type: 'resource', buffered: true });
 }