<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 示例</title>
</head>
<body>
<div id="app">
<p>总数：{{total}}</p>
<my-component @increase="handleGetTotal" @reduce="handleGetTotal"></my-component>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script>
<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;
}
}
});
</script>
</body>
</html>注意：组件里data方法与，Vue对象里data的不同！
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