From 8388bd02875e436bbe8ab26c006edada49a4a5cb Mon Sep 17 00:00:00 2001
From: Thomas Heller <thomas.heller@dynatrace.com>
Date: Thu, 11 Feb 2021 11:55:51 +0000
Subject: [PATCH] fix(expandable-section): Fixes an issue where toggling the
 expandable section was triggering a form submission.

Fixes APM-283142
---
 .../expandable-panel/src/expandable-panel-trigger.ts        | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libs/barista-components/expandable-panel/src/expandable-panel-trigger.ts b/libs/barista-components/expandable-panel/src/expandable-panel-trigger.ts
index d958d80b4f..9f5b430c0d 100644
--- a/libs/barista-components/expandable-panel/src/expandable-panel-trigger.ts
+++ b/libs/barista-components/expandable-panel/src/expandable-panel-trigger.ts
@@ -36,7 +36,7 @@ import { DtExpandablePanel } from './expandable-panel';
     '[attr.aria-expanded]': 'dtExpandablePanel && dtExpandablePanel.expanded',
     '[attr.aria-controls]': 'dtExpandablePanel && dtExpandablePanel.id',
     '[tabindex]': 'dtExpandablePanel && dtExpandablePanel.disabled ? -1 : 0',
-    '(click)': '_handleClick()',
+    '(click)': '_handleClick($event)',
     '(keydown)': '_handleKeydown($event)',
   },
 })
@@ -66,7 +66,9 @@ export class DtExpandablePanelTrigger implements OnDestroy {
   }
 
   /** @internal Handles the trigger's click event. */
-  _handleClick(): void {
+  _handleClick(event: MouseEvent): void {
+    event.preventDefault();
+    event.stopPropagation();
     if (this.dtExpandablePanel && !this.dtExpandablePanel.disabled) {
       this.dtExpandablePanel.toggle();
     }