<!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>vue生命周期学习</title>
<script src="https://cdn.bootcss.com/vue/2.5.16/vue.js"></script>
</head>
<body>
<div id="app">
<h1>{{message}}，这是在outerHtml中</h1>
</div>
</body>
<script>
var app = new Vue({
el: ‘#app‘,
data: {
message: 10
},
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创建完毕状态------‘);
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);
},
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.$data);
console.log("%c%s", "color:red","message: " + this.message);
},
mounted: function() {
console.group(‘------mounted 挂载结束状态------‘);
console.log("%c%s", "color:red","el : " + this.$el);
console.log(this.$el);
console.log("%c%s", "color:red","data : " + this.$data);
console.log("%c%s", "color:red","message: " + this.message);
},
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>
</html>
beforeCreate
created
没有el
（2）除了el，我们还会用到template，template对生命周期的影响如下：
template代码
注：综合排名优先级：render函数>template选项>outer Html
mount
app.message=20来触发update事件。输出如下图：
update
destroy
beforeRouteEnter (to, from, next) {
# 在导航确认前被调用,即将挂载的新组件还没被创建。
# 不能获取组件实例 `this`
# 因为当守卫执行前，组件实例还没被创建
},
beforeRouteUpdate (to, from, next) {
# 在当前路由改变，但是该组件被复用时调用
# 可以访问组件实例 `this`
},
beforeRouteLeave (to, from, next) {
# 导航离开该组件的对应路由时调用
# 可以访问组件实例 `this`
}
原文：https://www.cnblogs.com/jianguo221/p/11782523.html