<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script type="text/javascript" src="https://cdn.jsdelivr.net/vue/2.1.3/vue.js"></script>
</head>
<style>
</style>

<body>
<div id="app">
<p>{{message}}</p>
数字：
</div>
<script>
var app = new Vue({
el: "#app",
data: {
message: "中国"
},

beforeCreate: function () { console.group('beforeCreate 创建前状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log("%c%s", "color:red", "data :" + this.$data); console.log("%c%s", "color:red", "message :" + this.message) }, created: function () { console.group('created 创建后状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log(this.$el) console.log("%c%s", "color:red", "data :" + this.$data); console.log(this.$data) console.log("%c%s", "color:red", "message :" + this.message) }, beforeMount: function () { console.group('beforeMount 挂载前状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log(this.$el) console.log("%c%s", "color:red", "data :" + this.$data); console.log(this.$data) console.log("%c%s", "color:red", "message :" + this.message) }, mounted: function () { console.group('mounted 挂载后状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log(this.$el) console.log("%c%s", "color:red", "data :" + this.$data); console.log(this.$data) console.log("%c%s", "color:red", "message :" + this.message) }, beforeUpdate: function () { console.group('beforeUpdate 更新前状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log(this.$el) console.log("%c%s", "color:red", "data :" + this.$data); console.log(this.$data) console.log("%c%s", "color:red", "message :" + this.message) }, updated: function () { console.group('updated 更新后状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log(this.$el) console.log("%c%s", "color:red", "data :" + this.$data); console.log(this.$data) console.log("%c%s", "color:red", "message :" + this.message) }, beforeDestroy: function () { console.group('beforeDestroy 销毁前状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log(this.$el) console.log("%c%s", "color:red", "data :" + this.$data); console.log(this.$data) console.log("%c%s", "color:red", "message :" + this.message) }, destroyed: function () { console.group('destroyed 销毁后状态==============') console.log("%c%s", "color:red", "el :" + this.$el); console.log(this.$el) console.log("%c%s", "color:red", "data :" + this.$data); console.log(this.$data) console.log("%c%s", "color:red", "message :" + this.message) }})

</script>
</body>

</html>

1.程序运行，控制台看输出：

2.控制台输入 app.message = 'test'


3.控制台输入 app.$destroy()