<html>
<head>
<meta charset="utf-8" />
<title>vue-router-demo</title>
<link href="index.css" rel="stylesheet" />
<script src="vue.js"></script>
<script src="vue-router.js"></script>
</head>
<body>
<div id="app">
<p>{{ message }}</p>
</div>
<script>
var app = new Vue({
el: '#app',
data: {
message: "monkeyWang is boy"
},
beforeCreate: function () {
console.group('beforeCreate 创建前状态===============》');
console.log("%c%s", "color:red", "el : " + this.$el); //undefined
console.log("%c%s", "color:red", "data : " + this.$data); //undefined
console.log("%c%s", "color:red", "message: " + this.message)
},
created: function () {
console.group('created 创建完毕状态===============》');
console.log("%c%s", "color:red", "el : " + this.$el); //undefined
console.log("%c%s", "color:red", "data : " + this.$data); //已被初始化
console.log("%c%s", "color:red", "message: " + this.message); //已被初始化
},
beforeMount: function () {
console.group('beforeMount 挂载前状态===============》');
console.log("%c%s", "color:red", "el : " + (this.$el)); //已被初始化
console.log(this.$el);
console.log("%c%s", "color:red", "data : " + this.$data); //已被初始化
console.log("%c%s", "color:red", "message: " + this.message); //已被初始化
},
mounted: function () {
console.group('mounted 挂载结束状态===============》');
console.log("%c%s", "color:red", "el : " + this.$el); //已被初始化
console.log(this.$el);
console.log("%c%s", "color:red", "data : " + this.$data); //已被初始化
console.log("%c%s", "color:red", "message: " + this.message); //已被初始化
},
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.$data);
console.log("%c%s", "color:red", "message: " + this.message);
},
updated: function () {
console.group('updated 更新完成状态===============》');
console.log("%c%s", "color:red", "el : " + this.$el);
console.log(this.$el);
console.log("%c%s", "color:red", "data : " + this.$data);
console.log("%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.$data);
console.log("%c%s", "color:red", "message: " + this.message);
},
destroyed: function () {
console.group('destroyed 销毁完成状态===============》');
console.log("%c%s", "color:red", "el : " + this.$el);
console.log(this.$el);
console.log("%c%s", "color:red", "data : " + this.$data);
console.log("%c%s", "color:red", "message: " + this.message)
}
})
</script>
</body>
</html>
作者：monkeyWang
链接：https://www.zhihu.com/question/52917848/answer/150661534
来源：知乎
