初識Vue--生命週期

時間 2020-01-09

標籤 vue 生命週期简体版

原文原文鏈接

初學Vue，寫一些隨便謹防忘記，不足之處謝謝指出！！！html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>生命週期</title>
    <script src="../js/vue.js"></script>
</head>
<body>
<div id="app">
    <button @click="dom()">點擊</button>
    <hr/>
    <button @click="del()">銷燬</button>
    {{msg}}
</div>
</body>
<script>
    new Vue({
        el: "#app",
        data: {
            msg: "我愛學Vue！！！"
        },

        /*建立以前，$el(並未接管#app) $data均爲undefined*/
        beforeCreate() {
            console.log("---------------beforeCreate----------------")
            console.log("el：" + this.$el)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.$data)
            console.log(this)
        },

        /*建立，$el爲undefined(並未接管#app)  $data已獲取數據*/
        created() {
            console.log("---------------created----------------")
            console.log("el：" + this.$el)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.$data)
        },
        /*掛載以前，$el已接管#app  $data獲取數據  可是並未將數據渲染*/
        beforeMount() {
            console.log("---------------beforeMount----------------")
            console.log("el：" + this.$el.innerHTML)
            console.log(this.$el)
            console.log("data：" + this.$data)
            console.log(this.$data)
        },
        /*掛載以前，$el已接管#app  $data獲取數據  並將數據渲染  頁面成型*/
        mounted() {
            console.log("---------------mounted----------------")
            console.log("el：" + this.$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 = "我愛Vue-初學！！！"
                console.log(this)
            },
            del() {
                this.$destroy();
            }
        }

    });
</script>
</html>

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