The first thought, the
reference must be changed, from vue 2.5 to 3 or more
<!DOCTPYE html>
<html>
<head>
<title>ruguog</title>
</head>
<body>
<div id="app">
<input type="button" value="hamimelon!" @click="test"/>
</div>
<script src="https://unpkg.com/vue@next"></script>
<script>
Vue.createApp({
data() {
return {
name: 'Vue.js'
}
},
methods: {
greet(event) {
// `methods` 内部的 `this` 指向当前活动实例
alert('Hello ' + this.name + '!')
// `event` 是原生 DOM event
if (event) {
alert(event.target.tagName)
}
}
}
}).mount('#event-with-method')
</script>
</body>
</html>
Second thought: modified mount() and changed it to app.
Third thought: modified greet under methods and changed to test, following the instructions in @click.
<!DOCTPYE html>
<html>
<head>
<title>ruguog</title>
</head>
<body>
<div id="app">
<input type="button" value="hamimelon!" @click="test"/>
</div>
<script src="https://unpkg.com/vue@next"></script>
<script>
Vue.createApp({
data() {
return {
name: 'Vue.js'
}
},
methods: {
test(event) {
// `methods` 内部的 `this` 指向当前活动实例
alert('Hello ' + this.name + '!')
// `event` 是原生 DOM event
if (event) {
alert(event.target.tagName)
}
}
}
}).mount('#app')
</script>
</body>
</html>