From 5794d8a9542c48b7ad1e7c17e1fd1b9dc83568c5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adomas=20Ven=C4=8Dkauskas?= <adomas.ven@gmail.com>
Date: Thu, 12 Jun 2025 14:28:08 +0300
Subject: [PATCH] Restore split menu button fix (d96afa44, regression b2ad17d6)

---
 chrome/content/zotero/elements/splitMenuButton.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/chrome/content/zotero/elements/splitMenuButton.js b/chrome/content/zotero/elements/splitMenuButton.js
index 600bf9b613..a71a6f6064 100644
--- a/chrome/content/zotero/elements/splitMenuButton.js
+++ b/chrome/content/zotero/elements/splitMenuButton.js
@@ -58,6 +58,20 @@
 
 		connectedCallback() {
 			this.append(this.contentFragment);
+			
+			// Prevent DOM-attached mouse handlers from running in the dropmarker area
+			for (const eventType of ['mousedown', 'mouseup', 'click']) {
+				const handler = this.getAttribute('on' + eventType);
+				if (!handler) {
+					continue;
+				}
+				this['on' + eventType] = null;
+				this.addEventListener(eventType, (event) => {
+					if (!this._isEventInDropmarkerBox(event)) {
+						eval(handler).bind(this);
+					}
+				});
+			}
 		}
 
 		disconnectedCallback() {