diff --git a/core/misc/tabledrag.js b/core/misc/tabledrag.js
index 9ece3b65eca80d49e07f03139e609479b5568e63..eeed3eb19cd4f5f12eb9392dc39378797ab09e15 100644
--- a/core/misc/tabledrag.js
+++ b/core/misc/tabledrag.js
@@ -1247,12 +1247,7 @@
         ? de.clientHeight
         : b.offsetHeight);
     this.windowHeight = windowHeight;
-    let scrollY;
-    if (document.all) {
-      scrollY = !de.scrollTop ? b.scrollTop : de.scrollTop;
-    } else {
-      scrollY = window.pageYOffset ? window.pageYOffset : window.scrollY;
-    }
+    const scrollY = window.pageYOffset ? window.pageYOffset : window.scrollY;
     this.scrollY = scrollY;
     const trigger = this.scrollSettings.trigger;
     let delta = 0;