From a5cbfa2aabb97baef156525dcf8bdf7e24680e0e Mon Sep 17 00:00:00 2001
From: Brandon <robertsbt@gmail.com>
Date: Tue, 19 Feb 2019 16:00:03 +0000
Subject: [PATCH] docs: backport fix to event-binding example for production
 build (#28423)

Examples are run in production mode and the methods weren't optional.

PR Close #28423
---
 aio/content/examples/event-binding/src/app/app.component.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/aio/content/examples/event-binding/src/app/app.component.ts b/aio/content/examples/event-binding/src/app/app.component.ts
index 2dc9515d40..f8f4d0ef4b 100644
--- a/aio/content/examples/event-binding/src/app/app.component.ts
+++ b/aio/content/examples/event-binding/src/app/app.component.ts
@@ -11,17 +11,17 @@ export class AppComponent {
   currentItem = { name: 'teapot'} ;
   clickMessage = '';
 
-  onSave(event: KeyboardEvent) {
+  onSave(event?: KeyboardEvent) {
     const evtMsg = event ? ' Event target is ' + (<HTMLElement>event.target).textContent : '';
     alert('Saved.' + evtMsg);
     if (event) { event.stopPropagation(); }
   }
 
-  deleteItem(item: Item) {
+  deleteItem(item?: Item) {
     alert(`Delete the ${item}.`);
   }
 
-  onClickMe(event: KeyboardEvent) {
+  onClickMe(event?: KeyboardEvent) {
     const evtMsg = event ? ' Event target class is ' + (<HTMLElement>event.target).className  : '';
     alert('Click me.' + evtMsg);
   }