<!DOCTYPE html>
<html>
<head>
<!-- 声明文档使用的字符编码 -->
<meta charset='utf-8'>
<title>Title of the document</title>
<script type="text/javascript" src="vue.js"></script>
</head>
<body>
<div id="app">
<p>总数: {{ total }}</p>
<my-component @increase="handleGetTotal" @reduce="handleGetTotal"></my-component>
</div>
</body>
<script>
Vue.component('my-component', {
template: '\
<div>\
<button @click="handleIncrease">+1</button>\
<button @click="handleReduce">-1</button>\
</div>',
data: function() {
return {
counter: 0
}
},
methods: {
handleIncrease: function() {
this.counter++;
this.$emit('increase', this.counter);
},
handleReduce: function() {
this.counter--;
this.$emit('reduce', this.counter);
}
}
})
var app = new Vue({
el: '#app',
data: {
total: 0
},
methods: {
handleGetTotal: function(total) {
this.total = total;
}
},
computed: {
}
})
</script>
</html>
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