in events guide, only alert tagName if event exists

chrisvfritz · chrisvfritz · commit 03093c1c0a89 · 2017-01-18T23:24:13.000-05:00
diff --git a/src/v2/guide/events.md b/src/v2/guide/events.md
@@ -67,7 +67,9 @@ var example2 = new Vue({
       // `this` inside methods points to the Vue instance
       alert('Hello ' + this.name + '!')
       // `event` is the native DOM event
-      alert(event.target.tagName)
+      if (event) {
+        alert(event.target.tagName)
+      }
     }
   }
 })
@@ -91,7 +93,9 @@ var example2 = new Vue({
   methods: {
     greet: function (event) {
       alert('Hello ' + this.name + '!')
-      alert(event.target.tagName)
+      if (event) {
+        alert(event.target.tagName)
+      }
     }
   }
 })

Original file line number	Diff line number	Diff line change
`@@ -67,7 +67,9 @@ var example2 = new Vue({`
`67`	`67`	// `this` inside methods points to the Vue instance
`68`	`68`	`alert('Hello ' + this.name + '!')`
`69`	`69`	// `event` is the native DOM event
`70`		`- alert(event.target.tagName)`
	`70`	`+ if (event) {`
	`71`	`+ alert(event.target.tagName)`
	`72`	`+ }`
`71`	`73`	`}`
`72`	`74`	`}`
`73`	`75`	`})`
`@@ -91,7 +93,9 @@ var example2 = new Vue({`
`91`	`93`	`methods: {`
`92`	`94`	`greet: function (event) {`
`93`	`95`	`alert('Hello ' + this.name + '!')`
`94`		`- alert(event.target.tagName)`
	`96`	`+ if (event) {`
	`97`	`+ alert(event.target.tagName)`
	`98`	`+ }`
`95`	`99`	`}`
`96`	`100`	`}`
`97`	`101`	`})`