From e2eb096ed2498ef1d2617beed5e80627385af6d3 Mon Sep 17 00:00:00 2001
From: Andrew Hyndman <ahyndman@dropbox.com>
Date: Tue, 2 Apr 2024 16:40:56 -0400
Subject: [PATCH] Fix edge case

---
 src/networkIdleObservable.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/networkIdleObservable.ts b/src/networkIdleObservable.ts
index cb2c692..bc43678 100644
--- a/src/networkIdleObservable.ts
+++ b/src/networkIdleObservable.ts
@@ -186,7 +186,7 @@ class ResourceLoadingIdleObservable {
       (element instanceof HTMLImageElement && element.complete) ||
       (element instanceof HTMLLinkElement && !element.href) ||
       (element instanceof HTMLScriptElement && !element.src) ||
-      (element instanceof HTMLIFrameElement && !element.src)
+      (element instanceof HTMLIFrameElement && (!element.src || element.src === 'about:blank'))
     ) {
       return;
     }