From 5e099a65afe9695592e2b355806d8cddcae3a9ed Mon Sep 17 00:00:00 2001
From: Darcy Wong <darcy_wong@sil.org>
Date: Wed, 10 Jan 2024 13:28:45 +0700
Subject: [PATCH] fix(web): Add null check of offsetParent for longpress keys

---
 web/src/engine/osk/src/input/gestures/browser/subkeyPopup.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/web/src/engine/osk/src/input/gestures/browser/subkeyPopup.ts b/web/src/engine/osk/src/input/gestures/browser/subkeyPopup.ts
index e29521bb423..20cfdb341f1 100644
--- a/web/src/engine/osk/src/input/gestures/browser/subkeyPopup.ts
+++ b/web/src/engine/osk/src/input/gestures/browser/subkeyPopup.ts
@@ -288,7 +288,8 @@ export default class SubkeyPopup implements GestureHandler {
     const _Box = vkbd.topContainer;
     let rowElement = (e.key as OSKBaseKey).row.element;
     let ss=subKeys.style;
-    var x = e.offsetLeft + (<HTMLElement>e.offsetParent).offsetLeft + 0.5*(e.offsetWidth-subKeys.offsetWidth);
+    let parentOffsetLeft = e.offsetParent ? (<HTMLElement>e.offsetParent).offsetLeft : 0;
+    var x = e.offsetLeft + parentOffsetLeft + 0.5*(e.offsetWidth-subKeys.offsetWidth);
     var xMax = vkbd.width - subKeys.offsetWidth;
 
     if(x > xMax) {