From 5e2cb55c1ab19a7add8a611a060499ab6f9804fe Mon Sep 17 00:00:00 2001
From: Matt Driscoll <mdriscoll@esri.com>
Date: Mon, 25 Nov 2024 11:16:31 -0800
Subject: [PATCH] fix(dialog): fix error when initially opened. #10860

---
 .../calcite-components/src/components/dialog/dialog.tsx   | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/calcite-components/src/components/dialog/dialog.tsx b/packages/calcite-components/src/components/dialog/dialog.tsx
index 71665087c9c..f4da3a62dba 100644
--- a/packages/calcite-components/src/components/dialog/dialog.tsx
+++ b/packages/calcite-components/src/components/dialog/dialog.tsx
@@ -401,7 +401,13 @@ export class Dialog
   }
 
   private handleOpenedChange(value: boolean): void {
-    this.transitionEl.classList.toggle(CSS.openingActive, value);
+    const { transitionEl } = this;
+
+    if (!transitionEl) {
+      return;
+    }
+
+    transitionEl.classList.toggle(CSS.openingActive, value);
     onToggleOpenCloseComponent(this);
   }