From c7620bc3fc4874d224f46aeb44f5039d9e3af331 Mon Sep 17 00:00:00 2001
From: Sam El-Husseini <sam.elhusseini@gmail.com>
Date: Mon, 23 Mar 2020 16:32:27 -0700
Subject: [PATCH] Fix issue #714 bubbling event when hitting a tree control
 group (#3761)

---
 core/components/tree/treecontrol.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core/components/tree/treecontrol.js b/core/components/tree/treecontrol.js
index 0c559c97d..3ec32654a 100644
--- a/core/components/tree/treecontrol.js
+++ b/core/components/tree/treecontrol.js
@@ -372,6 +372,10 @@ Blockly.tree.TreeControl.prototype.getNodeFromEvent_ = function(e) {
     if (target == this.getElement()) {
       break;
     }
+    // Don't bubble if we hit a group. See issue #714.
+    if (target.getAttribute('role') == Blockly.utils.aria.Role.GROUP) {
+      return null;
+    }
     target = target.parentNode;
   }
   return null;