Vue的生命周期
Vue生命周期的钩子函数：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
<title>Title</title>
</head>
<body>
<div id="app">
{{name}}
</div>
<script>
const app = new Vue({
el:"#app",
data:{
name:"eric"
},
methods:{
init:function(){
console.log(123)
}
},
beforeCreate(){
console.group("BeforeCreate");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
},
created(){
console.group("Created");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
},
beforeMount(){
console.group("BeforeMount");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
},
mounted(){
console.group("Mounted");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
},
beforeUpdate(){
console.group("BeforeUpdate");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
},
updated(){
console.group("Updated");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
},
beforeDestroy(){
console.group("BeforeDestroy");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
},
destroyed(){
console.group("Destroyed");
console.log(this.$el);
console.log(this.name);
console.log(this.init);
}
})
</script>
</body>
</html>
Vue的生命周期的钩子 LifeCycle hooks
数据监听之前：beforeCreate()；
监听数据变化：created()；
虚拟dom加载完成前：beforeMount()；
页面真实加载完成后：mounted()；
数据改变前执行的函数：beforeUpdate()；
数据改变后执行的函数：updated()；
Vue实例销毁前：beforeDestroy()；
Vue实例销毁后：destroyed()s