<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>vue.js Hello World!</title>
<script type="text/javascript" src="https://cdn.bootcss.com/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<div id="counter-event-example">
<p>{{ total }}</p>
<button-counter v-on:increment="incrementTotal"></button-counter>
<button-counter v-on:increment="incrementTotal"></button-counter>
</div>
<script type="text/javascript">
/*
每个 Vue 实例都实现了事件接口 (Events interface)，即：
- 使用
$on(eventName)监听事件 - 使用
$emit(eventName)触发事件
*/
Vue.component('button-counter', {
template: '<button v-on:click="increment">{{ counter }}</button>',
data: function () {
return {
counter: 0
}
},
methods: {
increment: function () {
this.counter += 1
this.$emit('increment')
}
},
})
new Vue({
el: '#counter-event-example',
data: {
total: 0
},
methods: {
incrementTotal: function () {
this.total += 1
}
}
})
</script>
</body>
</html>