Do nothing for action clicks (#702)

* Do nothing for action clicks

* [AUTOMATED]: Prettier Code Styling

* Address comment

packages/messaging/src/controllers/sw-controller.ts

@@ -159,11 +159,15 @@ export class SWController extends ControllerInterface {
     ) {
       // Not an FCM notification, do nothing.
       return;
+    } else if (event.action) {
+      // User clicked on an action button.
+      // This will allow devs to act on action button clicks by using a custom
+      // onNotificationClick listener that they define.
+      return;
     }
 
     // Prevent other listeners from receiving the event
     event.stopImmediatePropagation();
-
     event.notification.close();
 
     const msgPayload: MessagePayload = event.notification.data[FCM_MSG];

packages/messaging/test/sw-controller.test.ts

@@ -517,6 +517,28 @@ describe('Firebase Messaging > *SWController', () => {
       expect(event.stopImmediatePropagation.callCount).to.equal(0);
     });
 
+    it('should do nothing for action clicks', async () => {
+      const waitUntilSpy = sandbox.spy();
+      const event: any = {
+        notification: {
+          data: {
+            FCM_MSG: {
+              notification: {}
+            }
+          },
+          close: sandbox.spy()
+        },
+        waitUntil: waitUntilSpy,
+        stopImmediatePropagation: sandbox.spy(),
+        action: 'action1'
+      };
+      const swController = new SWController(app);
+
+      swController.onNotificationClick(event);
+
+      expect(event.stopImmediatePropagation.callCount).to.equal(0);
+    });
+
     it('should handle FCM notification without a notification data field', async () => {
       const waitUntilSpy = sandbox.spy();
       const event: any = {