From 607539e2b4a8dc802b9e06f6dd0e638d34ed535e Mon Sep 17 00:00:00 2001
From: Marvin Klein <32510006+MarvinKlein1508@users.noreply.github.com>
Date: Fri, 24 Apr 2026 15:13:52 +0200
Subject: [PATCH 1/3] Add part for content and actions in fluent-message-bar

---
 .../web-components/src/message-bar/message-bar.template.ts    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/web-components/src/message-bar/message-bar.template.ts b/packages/web-components/src/message-bar/message-bar.template.ts
index bc9ed59aafccf7..9219079aa90ed7 100644
--- a/packages/web-components/src/message-bar/message-bar.template.ts
+++ b/packages/web-components/src/message-bar/message-bar.template.ts
@@ -10,10 +10,10 @@ import type { MessageBar } from './message-bar.js';
 export function messageBarTemplate<T extends MessageBar>(): ElementViewTemplate<T> {
   return html<T>`
     <slot name="icon"></slot>
-    <div class="content">
+    <div class="content" part="content">
       <slot></slot>
     </div>
-    <div class="actions">
+    <div class="actions" part="actions">
       <slot name="actions"></slot>
     </div>
     <slot name="dismiss"></slot>

From a8da6223277dc423d2cbf9a41957cdbf438f5583 Mon Sep 17 00:00:00 2001
From: Marvin Klein <support@marvinkleinmusic.de>
Date: Fri, 24 Apr 2026 18:53:59 +0200
Subject: [PATCH 2/3] Add @csspart docs

---
 packages/web-components/src/message-bar/message-bar.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/web-components/src/message-bar/message-bar.ts b/packages/web-components/src/message-bar/message-bar.ts
index 7a3b5f8b0ab7f0..931446606818ab 100644
--- a/packages/web-components/src/message-bar/message-bar.ts
+++ b/packages/web-components/src/message-bar/message-bar.ts
@@ -9,6 +9,8 @@ import { MessageBarIntent, MessageBarLayout, MessageBarShape } from './message-b
  * @slot actions - Content that can be provided for the actions
  * @slot dismiss - Content that can be provided for the dismiss button
  * @slot - The default slot for the content
+ * @csspart content - The wrapper for the message
+ * @csspart actions - The wrapper for extra action buttons related to the message
  * @public
  */
 export class MessageBar extends FASTElement {

From 5e73627081ca4122073a3f360980840f50daddb4 Mon Sep 17 00:00:00 2001
From: Marvin Klein <support@marvinkleinmusic.de>
Date: Fri, 24 Apr 2026 19:07:08 +0200
Subject: [PATCH 3/3] run yarn change

---
 ...eb-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 change/@fluentui-web-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json

diff --git a/change/@fluentui-web-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json b/change/@fluentui-web-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json
new file mode 100644
index 00000000000000..4f567eda117538
--- /dev/null
+++ b/change/@fluentui-web-components-83c39762-3f94-4384-9c28-f1cb5fc76818.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Added part for content and actions in fluent-message-bar",
+  "packageName": "@fluentui/web-components",
+  "email": "support@marvinkleinmusic.de",
+  "dependentChangeType": "patch"
+}