mahmudalim / Vue-demo

Vue学习小demo

vue-small-project

vue小Demo-登录删除 生命周期-鈎子函數講解

<title></title> <script src="https://cdn.bootcss.com/vue/2.5.17/vue.min.js"></script>

<div id="app">
    <p>{{ message }}</p>
</div>

<script type="text/javascript">
    var app = new Vue({
        el: '#app',
        data: {
            message: "Hello, world."
        },
        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>