<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script></head><body><div id="app"> <runoob :title="num"></runoob></div></body>xxxxxxxxxxxxxxxxxxxxVue.component('runoob', { template: '<h1>{{title}}自定义组件!</h1>', props: { title: [Number] }})// 创建根实例new Vue({ el: '#app', data:{ num: 123 }, created() { setTimeout(() => { this.num = 456 }, 3000) }})