初识Vue--生命周期

当前位置:
首页 > temp > JavaScript教程 >

初识Vue--生命周期
初学Vue，写一些随记谨防忘记，不足之处谢谢指出！！！
本文可以直接复制自行创建一个HTML页面，查看结果。
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>生命周期</title>
    <script src="../js/vue.js"></script>
</head>
<body>
<div id="app">
    <button @click="dom()">点击</button>
    <hr/>
    <button @click="del()">销毁</button>
    {{msg}}
</div>
</body>
<script>
    new Vue({
        el: "#app",
        data: {
            msg: "我爱学Vue！！！"
        },

        /*创建之前，$el(并未接管#app) $data均为undefined*/
        beforeCreate() {
            console.log("---------------beforeCreate----------------")
            console.log("el：" + this.$el)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.$data)
            console.log(this)
        },

        /*创建，$el为undefined(并未接管#app)  $data已获取数据*/
        created() {
            console.log("---------------created----------------")
            console.log("el：" + this.$el)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.$data)
        },
        /*挂载之前，$el已接管#app  $data获取数据  但是并未将数据渲染*/
        beforeMount() {
            console.log("---------------beforeMount----------------")
            console.log("el：" + this.$el.innerHTML)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.$data)
        },
        /*挂载之前，$el已接管#app  $data获取数据  并将数据渲染  页面成型*/
        mounted() {
            console.log("---------------mounted----------------")
            console.log("el：" + this.$el.innerHTML)
            console.log(this.$el)
            console.log("data：" + this.$data)
        },
        beforeUpdate() {
            console.log("---------------beforeUpdate----------------")
            console.log("el：" + this.$el.innerHTML)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.msg)
        },
        updated() {
            console.log("---------------updated----------------")
            console.log("el：" + this.$el.innerHTML)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.msg)
        },
        beforeDestroy() {
            console.log("---------------beforeDestroy----------------")
            console.log("el：" + this.$el.innerHTML)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.msg)
        },
        destroyed() {
            console.log("---------------destroyed----------------")
            console.log("el：" + this.$el.innerHTML)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.msg)
        },
        methods: {
            dom() {
                this.msg = "我爱Vue-初学！！！"
                console.log(this)
            },
            del() {
                this.$destroy();
            }
        }

    });
</script>
</html>
栏目列表