理解vue生命周期函数

<!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>
</head>
<body>
    <div id="app">
        <p id="ceshi">{{a}}</p>
        <input type="button" value="点击显示隐藏" @click="trigger">
        <my-component v-if="isShow"></my-component>
    </div>
    <script src="./vue.js"></script>
    <script>
    Vue.component('myComponent',{
        template:'<h1>自定义组件</h1>',
        beforeDestroy: function () {
            console.log('组件被销毁之前钩子函数');
        },
        destroyed: function () {
            console.log('组件被销毁钩子函数');
        }

    })
    var vm = new Vue({
        el:'#app',
        methods:{
            trigger:function(){
                this.isShow = !this.isShow;
            }
        },
        data:{
            isShow:true,
            a:100
        },
        beforeCreate:function(){
            console.log('=========beforeCreate start ===============')
            console.log('数据为' + this.a);
            console.log('元素的innerText为' + document.getElementById('ceshi').innerText);
            console.log('=========beforeCreate end ===============')
            console.log('                       ');
            console.log('                       ');
        },
        created:function(){
            console.log('=========created start ===============')
            console.log('数据为' + this.a);
            console.log('元素的innerText为' + document.getElementById('ceshi').innerText);
            console.log('=========created end ===============')
            console.log('                       ');
            console.log('                       ');
        },
        beforeMount:function(){
            console.log('=========beforeMount start ===============')
            console.log('数据为' + this.a);
            console.log('元素的innerText为' + document.getElementById('ceshi').innerText);
            console.log('=========beforeMount end ===============')
            console.log('                       ');
            console.log('                       ');
        },
        mounted:function(){
            console.log('=========mounted start ===============')
            console.log('数据为' + this.a);
            console.log('元素的innerText为' + document.getElementById('ceshi').innerText);
            console.log('=========mounted end ===============')
            console.log('                       ');
            console.log('                       ');
        },
        beforeUpdate:function(){
            console.log('=========beforeUpdate start ===============')
            console.log('数据为' + this.a);
            console.log('元素的innerText为' + document.getElementById('ceshi').innerText);
            console.log('=========beforeUpdate end ===============')
            console.log('                       ');
            console.log('                       ');
        },
        updated:function(){
            console.log('=========updated start ===============')
            console.log('数据为'+this.a);
            console.log('元素的innerText为'+document.getElementById('ceshi').innerText);
            console.log('=========updated end ===============')
            console.log('                       ');
            console.log('                       ');
        }
    })
    </script>
</body>
</html>
zhengwei1949 / myblog

理解vue生命周期函数 #110
